Quick answer: A USDA hardiness zone only tells you the average coldest winter temperature. It says nothing about sunshine hours, summer heat, humidity or growing season length. Two places in the same zone can have wildly different growing conditions for chillies. Before you follow anyone’s growing advice, compare their sunshine hours, average temperatures and season length to yours. That one step will save you more failed seasons than any new fertiliser or gadget.

I’ve been growing chillies for around 20 years now and I’ll tell you something that might surprise you coming from someone who runs a YouTube channel about growing chillies: a huge amount of the growing advice on the internet, mine included, comes with a massive asterisk that nobody really talks about.

By the end of this article, you’ll know what that asterisk is and you’ll have a simple way to figure out whose advice actually applies to where you’re growing.

Prefer to watch the video? Click the link below:

Where It All Started

I started growing chillies back in 2006. The Bhut Jolokia, the Ghost Pepper, was all over the news as the hottest chilli in the world. I wanted to grow it. But I also wanted the challenge of growing something in England that has no business growing in England.

The first attempt was brutal. But that struggle, that figuring things out, is why I started this channel. And here’s what I’ve noticed over the years, especially in the comments: people follow a grower, copy the schedule, the feeding, the timing and get completely different results. Sometimes worse, sometimes better. And they can’t figure out why.

The answer is almost always the same thing. Climate. Not skill, not effort, not which fertiliser you bought. Climate.

What Is a Hardiness Zone (And What It Doesn’t Tell You)

The USDA plant hardiness zone system was first published in 1960. It does one thing: it takes the coldest temperature recorded each winter over a 30 year period, averages those numbers and assigns a zone.

There are 13 zones. Zone 1 is the coldest, around −50°C. Zone 13 never drops below about 18°C. Each zone covers roughly 5.5°C, split into A and B subdivisions of about 2.5°C each.

That’s useful if you want to know whether a perennial can survive your winter. But that’s all it tells you. Nothing about sunshine. Nothing about summer temperatures. Nothing about humidity, rainfall, cloud cover or how long your growing season actually lasts.

Chillies are technically perennials. They can live for years in the right conditions. But most of us in temperate climates grow them as annuals, which means hardiness zones were never really designed for how we use them. They exist to tell you whether a plant can survive winter. That’s about it.

The problem is that people use their zone number as shorthand for their whole climate and that’s where it falls apart.

Same Zone, Completely Different World

When someone online says “I’m in Zone 8” and you think “me too, I’ll do what they do,” you might be making a big mistake.

I’m in Zone 8A. I share that exact same zone number with Dallas in Texas, Sacramento in California, and Canberra in Australia. Four places, same zone. Let’s see how they actually compare for growing chillies.

Zone 8A Growing Conditions Compared

Sacramento gets more than double my sunshine hours during the months that matter. Dallas’s average growing temperature is double mine. Same zone number. Completely different reality for growing chillies.

Daylight Isn’t the Same as Sunshine

You might think England should have an advantage here. In June, I get over 16 hours of daylight. That’s longer than Sacramento. But daylight and sunshine are not the same thing.

What kills us in the UK is cloud cover. Sacramento’s skies are clear for most of the growing season, with over 90% sunshine in June and July. I can have 16 hours of daylight and 4 hours of actual sun hitting the plants. That’s the difference that matters when you’re growing something that evolved in warm, sunny climates.

What This Means for Your Growing

Think about what this means in practice. A grower in Sacramento gets three times the light and significantly more heat. If they tell you to start seeds in March and use a particular feeding ratio, that advice is built for their conditions. It works because they’ve got the sun and the warmth to back it up.

I start my seedlings in January because I have to. I grow in greenhouses because I have to. Without them, my season is too short, too cool and too inconsistent to get reliable results from most varieties. The greenhouses give me some control over temperature and protect the plants from wind and rain, but they’re not magic. I’m still working with the same limited sunlight.

A grower in a warmer climate can put their plants outside, in the ground and let nature do the work. I need infrastructure just to get close to what they get for free.

If you’re in a climate like mine and you follow that Sacramento grower’s March start date, you might run out of season before your superhots ripen. If you’re in Sacramento and you follow my January start date, your plants will be massive and rootbound before your outdoor season even begins.

Neither piece of advice is wrong. Both are right for where they were developed. The problem is when you apply one to the other without adjusting.

Why Some Growers Seem Fussier Than Others

I grow 400 to 500 plants across multiple greenhouses with automated watering and feeding. That scale, combined with a climate that doesn’t cooperate, is why I lean so hard on precision. I can’t hand water each plant and adjust on the fly. I can’t rely on a long, warm, sunny season to paper over mistakes.

If my timing is off by a few weeks, I lose a chunk of my harvest. If my feeding is sloppy, I see it in the plants almost immediately because there’s no surplus of light and heat compensating for the shortfall.

If you’ve got 10 or 20 plants on a patio or in a small greenhouse, especially in a warmer climate, you’ve got the luxury of flexibility. You can watch each plant individually, adjust as you go, be a bit rough with your ratios, and the conditions will forgive you. You don’t need my level of detail.

But understand that the difference between your situation and mine isn’t that one of us is doing it wrong. It’s that our climates demand different levels of precision.

That’s also why I lean on scientific research, peer reviewed studies and university extension work. I’m not running controlled trials in a lab. I’m one grower with one setup. But when your margin of error is this thin, you’d rather base decisions on published research than on guesswork. I need to understand why something works, not just that it worked once for someone somewhere.

Forgiving Climates Can Be Misleading

This is something worth thinking about when you’re watching growers online. Someone in a warm, sunny climate can use rough feeding ratios, start later, water approximately and still get impressive looking results. The climate does the heavy lifting.

That doesn’t mean their method is optimal. It means the conditions are forgiving enough that precision doesn’t matter as much. I’m not saying my climate is the hardest to grow in, either. A grower in the tropics dealing with humidity, disease pressure and pests I’ve never seen could make the same argument about their own challenges. Every difficult climate forces you to get precise about something.

In mine, it’s light, heat and timing. The point is that when conditions are tight, you find out quickly what actually matters and what doesn’t.

The 4 Things to Check Before You Follow Anyone’s Advice

Here’s what I’m asking you to do. Before you follow anyone’s advice (mine included, or any other YouTuber, or some person on a forum) look up four things about that grower:

1. Their location

2. Their annual sunshine hours

3. Their average growing season temperatures

4. Their growing season length

Compare those to yours. If they’re close, their advice probably transfers well. If they’re wildly different, you’ll need to adapt it.

A quick web search for “[your city] annual sunshine hours” and “[your city] average monthly temperature” will give you what you need in about two minutes. That tiny bit of homework will save you more heartache than any grow light or feeding schedule ever could.

Frequently Asked Questions

What hardiness zone do I need to grow chillies?

Chillies can be grown in almost any hardiness zone, but the approach changes dramatically. In colder zones (7 and below), you’ll likely need to start seeds indoors in January or February, use grow lights and grow in a greenhouse or polytunnel. In warmer zones (9+), you can often direct sow later in the season and grow outdoors with minimal protection. The zone alone won’t tell you how to grow. You need to factor in sunshine hours and summer temperatures too.

Can I grow chillies in the UK?

Absolutely. I’ve been doing it for around 20 years in Zone 8A. The key is understanding that the UK’s limited sunshine and cooler summers mean you need to start earlier (January for superhots, February for milder varieties), use greenhouses or polytunnels where possible and choose varieties that suit a shorter season. Jalapeños, cayennes and many annuum types do well. Superhots need more time and care, but they’re far from impossible.

When should I start chilli seeds?

This depends entirely on your growing conditions, which is the whole point of this article. In the UK or similar climates with limited sunshine and short summers, starting superhots in January and milder varieties in February gives you the best chance of ripe fruit before the season ends. In warmer, sunnier climates, you might not need to start until March or even April. Check your local sunshine hours and last frost date, then compare them to the grower whose schedule you’re following.

Why are my chilli plants not fruiting?

There are several possible reasons, but one of the most overlooked is that you might be following a growing schedule that doesn’t match your climate. If you started too late for your conditions, or you’re not providing enough supplemental light or heat, your plants might flower but not have enough energy or time to set fruit. Other common causes include poor pollination (especially indoors), over feeding with nitrogen, temperature stress, or inconsistent watering.

Do I need a greenhouse to grow chillies in the UK?

You don’t strictly need one, but it makes a significant difference. A greenhouse extends your effective growing season, protects plants from wind and rain and gives you warmer temperatures during those crucial summer months. Without one, stick to faster maturing varieties and give them the sunniest, most sheltered spot you’ve got. A south facing wall can work wonders.

Over to You

Drop a comment and tell us where you’re growing and what zone you’re in. I’d genuinely love to know what conditions you’re working with, because the more we understand each other’s climates, the better the advice we can share.

If you want to see the full video version of this, including the comparison data on screen, you can watch it over on YouTube. And if you’re just getting started with chillies, have a look at our beginner’s guide to growing chillies for a full walkthrough of what you’ll need.

If I had my way, I’d move them out sooner than I actually do. When the sun starts shining, I get itchy feet. It doesn’t matter how good your grow lights are, they’re never going to compete with glorious sunshine. And by this time of year, the germination shed is getting very full.

But move them out too early and they don’t “toughen up”. They sulk, drop leaves, and stall for weeks. Move them out too late and you waste the best growing window.

Temperatures matter more than dates. That’s the simplest way I can put it.

Below, I’ll walk you through the practical temperature thresholds chilli growers need, how greenhouse timing changes things and what to do if you don’t have one. I’ll also share my lazy way to harden off so you can spend more time growing and less time fussing.

Quick answer: In the UK, don’t move chilli plants outside until frost risk has passed for your region (often mid-April in the south, May or later further north). Even then, aim for nights consistently above 10°C and daytime temperatures heading toward 16°C or higher. The real growth sweet spot is 20°C to 27°C, which for most of the UK means mid-June onwards.

If you’d prefer to watch the video instead of reading on, click the video below:

UK Last Frost Dates: Why Timing Varies Across the Country

The UK is roughly comparable to USDA growing zones 8 or 9, but local conditions vary a lot. Coastal gardens, urban heat islands, valleys, exposed hilltop sites… all different. The most important detail to nail down first is your last frost date.

As a rough guide:

• Southern England: often around March to mid-April.
• Midlands & Northern England: commonly mid-April to late April.
• Scotland and Northern Ireland: can push toward May to late May.

Where I am (the Midlands), mid to late April is my realistic limit for timing outdoor moves. It’s about the limit of what I was willing to accept when we moved here. I wouldn’t go any further north, because that really does create some extra challenges.

What a lot of people miss is that your last frost date is only your “don’t die” line. It’s not your “start growing well” line. Plants need more than just survival temperatures to actually do anything useful.

The Temperature Thresholds That Actually Matter

Frost isn’t just about “cold air”. The real problem is when the plant’s root system gets near freezing. If roots freeze, it’s game over.

Here are the temperature thresholds that guide my decisions:

Temperature	What Happens
0°C	Frost can kill, especially plants in pots where roots are more exposed.
6°C	Survives, but expect leaf drop and flower drop.
10°C	Prolonged periods here can trigger dormancy behaviour.
13°C	Alive, but slow and miserable. Won’t thrive.
16°C	The “magic number” where most chilli species start growing again.
20°C to 27°C	The sweet spot for strong growth, flowering, and fruiting.
32°C+	Heat stress becomes a factor (rare in the UK, but it happens).

Why a Single Cold Night Isn’t the Real Problem

A single chilly night isn’t always the problem. A quick dip below 10°C overnight is usually fine and most of the time the soil will have enough latent heat to keep root temperatures a bit higher anyway. The real issue is when the 24-hour average sits around 10°C or below for a sustained period. That’s when your plants stall hard. They’re not dying, but they’re not growing either and the longer they sit at that temperature, the longer it takes them to come out of dormancy once conditions recover. In a short UK season, that lost time adds up quickly.

If You Have a Greenhouse, You Can Move Earlier (But It’s Not Magic)

A greenhouse can buy you a few extra weeks on each end of the season, but it’s not some magical thing. It still gets very cold in there at night unless you have a heater.

My Greenhouse Strategy

I aim to move plants into the greenhouse about 2 to 3 weeks before my last frost date. I use a small heater set to the frost setting so the greenhouse stays above roughly 4°C. You don’t need it to be tropical in there (which would cost an absolute fortune), just enough that if temperatures dip, the frost setting kicks in and keeps the worst of it away.

There’s also a practical benefit in how greenhouses behave during the day: the soil warms up and acts like thermal mass. That means even if nighttime temperatures dip to around 3°C to 4°C, the roots don’t crash instantly because the soil retains some of that daytime warmth.

No Greenhouse? You’ve Still Got Options (Watch the Soil Temp)

If you don’t have a greenhouse, don’t worry. I’ve used simple protective setups before and they can do a solid job. In some of my earlier videos, you’ll see I had a plastic greenhouse that cost me about £20 and it worked perfectly fine.

• Cold frame: helps protect from wind and cold air, and traps a bit of warmth.
• Bottle cloches: grab a 2-litre Coke bottle, cut off the bottom and pop it over your seedling. Cheap and surprisingly effective.
• Cheap plastic greenhouse: the kind you can pick up for around £20. Not fancy, but it does the job if you manage ventilation.
• Raised beds: if you plant directly into the ground, the soil can stay cold for months. Raising the bed warms the soil up quite a bit faster.
• Pots: my favourite, because you can control temperatures far more effectively than ground planting. Even inside that cheap plastic greenhouse I mentioned, I used pots and that’s what helped me maintain temperatures and grow some amazing chilli plants.

One thing to keep in mind: covering the plant helps the air temperature, but cold soil still punishes roots. The air cover is only half the story. If you’re planting outside without a greenhouse, pots or raised beds can make a real difference to root zone temperature.

When to Move Chilli Plants Outside in the UK (The Practical Rule)

Even after the risk of frost passes, I don’t treat “no frost” as the finish line. Chilli plants grow best when temperatures are consistently in the 20°C to 27°C range.

For the UK, that usually means you start seeing the real boost in flowering and fruiting around mid-June (assuming the weather cooperates). After that, you can often expect strong growth through June, July, August, and sometimes into September.

The Decision Process I Use

1. Check your last frost date for your region (the rough regional guide above is enough).
2. If you’re moving earlier than that, you need night protection: greenhouse, frost heater, cold frame or cloches.
3. Aim for nights that aren’t regularly dipping into single digits, and especially avoid long stretches where averages sit around 10°C.
4. If you want real growth, wait until you’re closer to that 16°C restart point and then into the 20°C to 27°C range.

Reality Check for the UK

Even when frost risk is “done”, your plants often don’t get going until mid-June, depending on the year. That’s when you usually see massive growth and a lot of flowering and fruiting happening. If you’ve been growing for a few seasons, you’ll know that feeling of waiting… and waiting… and then suddenly everything kicks off at once.

The Lazy Way to Harden Off (UK Edition)

Hardening off is basically: stop babying the plant, but don’t shock it.

Most people do the full shade-to-sun routine, moving trays in and out every day. Fair enough. I’m lazier and it’s actually one of the reasons I like to bring my plants out a little earlier than some people might.

Why the Lazy Method Can Work Here

Earlier in the season, the sun is still quite low in the sky. It’s not directly overhead like it’s going to be later in summer. It comes in at an angle, so the light is genuinely less intense than it’ll be in a couple of months. That means plants can acclimatise without you doing a daily marching routine with trays.

My Lazy Hardening Off Method

If I’m moving plants out by mid-April at the latest (Midlands area), I can often just take them straight out. I don’t shade anything. The plants acclimatise naturally because the sun isn’t strong enough to cause damage at that time of year. I focus more on temperature protection than sun protection at that stage.

I’ve covered this in more detail in my “Hardening Off the Lazy Way” video, so have a look at that if you want the full walkthrough.

When You Should Harden Off More Carefully

If you’re moving plants out later in the year, when the sun is punchier, you should acclimatise more carefully:

• Put plants outside in sunshine for part of the day.
• Move them into shade or shelter for the rest.
• Increase the exposure over several days.

If you live somewhere like Florida or Spain where you get strong sunshine even earlier in the year, you’d likely fry your plants taking them straight outdoors without hardening off. Shade netting becomes essential in those climates, not just a nice idea.

6 Common Mistakes That Wreck Chilli Plants in Spring

1. Using your last frost date as the only rule. Temperatures can still be too low for growth even after frost risk has passed, leading to weeks of stalling.
2. Forgetting that pots freeze faster than soil. Roots in pots are more exposed than roots in the ground. They suffer first.
3. Moving plants out, then leaving them during a cold snap. The classic “I’ll risk it” moment. If a sharp cold spell is forecast, bring them in or cover them.
4. No ventilation under cloches or mini covers. A warm day plus trapped humidity equals problems. Pop the lid or open the end during the day.
5. Thinking “survival” equals “growth”. Temperatures between 6°C and 13°C might keep them alive, but they won’t be thriving. That’s time you can’t get back in a short UK season.
6. Planting straight into cold ground without protection. If you’re going outside without a greenhouse, the ground soil can stay cold for months. Pots or raised beds help you avoid this.

Quick tip while you’re planning your outdoor move: get some marigolds in alongside your chillies. They’ll attract hoverflies and ladybugs, which will help keep aphids in check once your plants are outside. It’s one of the easiest things you can do to give your plants a better chance.

Quick Checklist: Move Your Chilli Plants Outside with Confidence

• No frost risk, or you’ve got night protection sorted.
• Avoid prolonged periods where averages sit around 10°C or below.
• Aim for 16°C as a restart temperature, then 20°C to 27°C for strong growth.
• Use pots or raised beds if soil temperature is holding you back.
• Harden off carefully if the sun is strong when you move them out.

Frequently Asked Questions

How early can I move chilli plants outside in the UK?

If you have a greenhouse, moving plants out about 2 to 3 weeks before your last frost date can work, as long as nights are protected with a frost heater or similar. Without a greenhouse, wait until frost risk is very low and temperatures are trending warmer.

What temperature kills chilli plants?

Around 0°C is the danger zone. The critical point is when the root system drops below freezing and this happens faster in pots than in ground soil.

Will chillies survive at 6°C?

Usually yes, but expect stress. Leaf drop and flower drop are common at this temperature. They’ll survive, but they won’t be happy about it.

When do chilli plants start growing again?

16°C is a useful benchmark where most common chilli species resume growth. The real sweet spot for strong flowering and fruiting is 20°C to 27°C.

Do I need to harden off my chillies in the UK?

It depends on timing. If you’re moving plants out early in the season (around mid-April in my area), the sun is still low in the sky and less intense, so you can often skip the gradual shading routine. If you’re moving them out later when the sun is stronger, a gradual exposure over several days is worth doing.

What’s the best alternative to a greenhouse?

A cold frame is a solid option. Cloches work too, even a 2-litre bottle with the bottom cut off. A cheap plastic greenhouse (around £20) does a decent job if you ventilate it. If you’re planting into the ground, raised beds help the soil warm faster. Pots give you the most control overall because you can move them around as conditions change.

Can grow lights replace sunshine?

Grow lights are brilliant for getting seedlings started indoors, but they’re never going to compete with real sunshine. Once conditions are warm enough outside, your plants will do far better in natural light.

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If I can leave you with one guiding idea, it’s this: timing isn’t just a calendar date. It’s about protecting roots from frost and then steering your plants into the temperature range where growth actually restarts. Get that bit right and the rest follows.

I made that mistake for years. Loads of growth, very little fruit, and a creeping feeling that the plants were laughing at me. Once I simplified my feeding approach, the results changed pretty quickly.

This is the feeding plan I actually use: when to start, what to use, how often, and how to read the plant when something’s off. No overcomplication, no expensive specialist products you don’t need.

How to feed chilli plants: quick summary

Seedlings: plain water only. A light seaweed feed at quarter strength is fine after a couple of weeks.

After potting up: let fresh compost do the work for 3-4 weeks before adding liquid feed.

Final pot: start liquid feed 3-4 weeks after the last pot-up. Begin at half strength.

In season: alternate feed and plain water. Never feed every watering.

Late season: reduce feeding and watering so existing fruit ripens naturally.

Key NPK ratio: aim for roughly 3:1:5 (N:P:K), with high potassium once flowering starts.

Feeding is a top-up, not the main course

A good soil mix does the heavy lifting. Liquid feed fills in the gaps as the season progresses and it’s not supposed to be doing the heavy work from the start.

Feed too early or too heavily and you get leafy, lush plants that flower late and fruit reluctantly. Salt builds up in the compost, roots get stressed and you end up chasing deficiencies that the overfeeding caused in the first place. It’s a frustrating loop.

The mindset shift that helped me most: feed less than you think you should and only increase if the plant shows you it needs more. A slightly underfed plant still sets pods. An overfed one often won’t.

Understanding NPK: what actually matters for chillies

Every fertiliser label shows three numbers: nitrogen (N), phosphorus (P) and potassium (K), as percentages by weight. A 4-1-6 product contains 4% nitrogen, 1% phosphorus and 6% potassium.

• Nitrogen (N): drives leafy growth and builds the plant’s structure. The one most people oversupply. Too much nitrogen and you’ll get a beautiful, bushy plant with very few pods.
• Phosphorus (P): supports roots and early development. Most decent UK composts already have enough and you rarely need to add extra.
• Potassium (K): this is the one that matters most for chilli growers. Supports flowering, fruit set, fruit quality and stress tolerance. Once your plant starts flowering, potassium should be the dominant number.

The ratio I aim for: roughly 3 parts nitrogen to 1 part phosphorus to 5 parts potassium. Keep an eye on that K number.

Which feed to use

You don’t need anything specialist. These are the options that work well for UK growers:

Tomorite is the one I’d recommend to most people starting out. It’s cheap, it’s everywhere and the ratio is close to what chillies actually need. Start at about half the dilution shown on the bottle when you first begin feeding. Chilli Focus is also solid if you want something formulated specifically for capsicums.

Miracle-Gro’s high nitrogen content makes it less ideal once flowering starts. The plant already wants to shift energy toward fruit, and a nitrogen-heavy feed pulls it back toward leaves. It won’t cause disaster at low doses, but switch away from it as flowering begins.

When to start feeding: the seasonal rhythm

Seedling stage

Plain water. That’s it. Seed compost has enough nutrients for the first few weeks and feeding too early is one of the most common mistakes beginners make. You can add a very light seaweed feed at quarter strength after a couple of weeks if you want to, but genuinely, it’s not essential. Watch: The Right Way to Water Your Chilli Plants.

After each pot-up

Every time you move a plant into fresh compost, the clock resets. A mix amended with slow-release organics (chicken manure pellets and fish, blood and bone are what I use) will feed the plant for three to four weeks without any liquid feed on top. Hold off and let the compost work.

Final pot

Start supplemental liquid feeding three to four weeks after the last pot-up into the final container. Begin at half strength and build up gradually only if the plant responds well. There’s rarely a need to go above full label strength and going beyond it causes more problems than it solves.

Alternate feedings with plain water. One watering with feed, the next without. This is the single change that makes the most difference for most growers. It gives the plant time to process what it’s already been given and prevents salt from accumulating in the compost.

Late season

Pull back. Reduce feeding frequency and watering as the season winds down. You want existing fruit to ripen, not new vegetative growth. Keeping the feed going at full strength into autumn just delays harvest.

Blossom end rot: what it actually is

That dark, sunken patch at the base of a chilli is gutting to find, especially after you’ve put months into the plant. The good news is it’s not a disease and it’s not the end of the plant. It’s a calcium delivery problem.

Calcium moves passively with water through the plant and during periods of stress, rapid growth or irregular watering, it tends to favour leaves over fruit. Heavy feeding makes this worse. Salt build-up from overfeeding impairs calcium uptake even when there’s plenty of calcium in the soil.

Prevention is much easier than the cure. Work fish, blood and bone into your soil mix at the start of the season. It provides slow-release calcium across the whole growing period. Pair that with consistent watering, because calcium delivery tracks closely with water movement through the plant.

Eggshells mid-season won’t help. They break down far too slowly to correct an active deficiency. Prevent the problem from the start.

Magnesium and Epsom salts

Magnesium sits at the centre of every chlorophyll molecule and it’s what keeps leaves green. A deficiency shows up as yellowing between the veins on older leaves, with the veins themselves staying green. If you’re seeing that pattern, magnesium is usually the culprit.

Calcium and magnesium interact and too much of one can block uptake of the other. Worth knowing if you’re adding a lot of calcium supplementation.

If you need to correct a deficiency, a foliar spray of magnesium sulfate (Epsom salts) works quickly. About one teaspoon per litre, every two to three weeks. Only spray when you can see signs of deficiency. Healthy green leaves don’t need it.

Micronutrients and pH

Chillies also need iron, manganese, copper, zinc, boron and molybdenum in small amounts. A deficiency in any of these can limit growth or fruit quality even when the main NPK numbers look right.

Iron deficiency is the one to watch for. It shows as yellowing of young leaves with green veins, appearing on new growth rather than older leaves. This usually means pH is too high and locking out iron, rather than iron actually being absent from the soil.

A seaweed feed early in the season covers most trace element bases. Good complete feeds like Tomorite and Chilli Focus include them too. In container growing, micronutrient deficiencies are uncommon if you use a decent feed and refresh compost each season. Problems build up when you reuse the same soil for years without replenishing organic matter, or when pH drifts high.

Common mistakes and how to avoid them

• Feeding onto dry compost: never apply concentrated feed to bone-dry soil. Water first, give it 20-30 minutes to soak through, then feed. Concentrated nutrients hitting dry roots cause burn.
• Starting too early: seedlings and newly potted plants rarely need liquid feed. Waiting until plants are established in the final pot prevents most overfeeding problems before they start.
• Feeding every watering: alternate feed and plain water. One with feed, one without. Every time. This one change fixes a lot.
• Ignoring what the plant is telling you: feeding isn’t a fixed schedule, it’s a response to what you see. Healthy, dark green leaves don’t need more nitrogen. Pale new growth does. Read the plant rather than the calendar.

Reading your plant: what the leaves are telling you

Plants are pretty good at communicating when something’s off, once you know what to look for:

• Yellowing lower leaves: usually nitrogen. The plant is pulling nutrients from old growth to support new. Increase your N feed slightly.
• Yellowing between veins on older leaves, with veins staying green: magnesium deficiency. Try an Epsom salt foliar spray.
• Yellowing on new growth with green veins: iron deficiency. Check pH, it may be too high.
• Leaf edges curling or browning: potassium deficiency, or salt build-up from overfeeding. Flush the pot with plain water and hold off on feeding for a week or two before reassessing.

Three rules that cover most situations

1. Wait before you start feeding. Don’t begin liquid feed until plants are in their final pot, then wait another three to four weeks after that last pot-up. Fresh compost is doing the work, so let it.
2. Always start at half strength. Easy to increase, impossible to undo. Half the label dose is the right starting point every time you switch to a new feed or come back from a break.
3. Alternate with plain water. One watering with feed, the next without. Every single time. This one habit prevents more problems than any other.

Quick-reference feeding checklist

• Seedlings: plain water. Optional light seaweed at quarter strength after a couple of weeks.
• After potting up: trust the compost for 3-4 weeks. No liquid feed needed.
• Final pot: begin liquid feed 3-4 weeks after the last pot-up, at half strength.
• Throughout the season: alternate feed and plain water. Foliar magnesium only when you see signs of deficiency.
• Late season: reduce feed and watering. Let the fruit ripen.

How to feed chilli plants: Frequently asked questions

When should I start feeding my chilli plants?

Three to four weeks after the last pot-up into the final container. Before that, decent amended compost covers the plant’s needs. Seedlings need only plain water, or a very light seaweed spray at most. Watch Why Pot Up (4 minute bitesize video) to find out why potting up in stages is so important.

What is the best feed for chilli plants in the UK?

Tomorite is the most practical option for most growers. It’s cheap, widely available and has an NPK ratio close to what chillies need. Chilli Focus is a solid alternative if you want something formulated specifically for capsicums. Either way, start at half the recommended dilution.

How often should I feed chilli plants?

Alternate feed and plain water. One watering with diluted feed, the next with plain water. Never feed every time you water, as it leads to salt build-up and causes the deficiencies you’re trying to prevent.

How do I prevent blossom end rot?

Work fish, blood and bone into your soil mix at the start of the season for slow-release calcium. Keep watering consistent, as irregular watering is a key trigger. Avoid heavy feeding that drives rapid growth, because calcium delivery can’t keep pace with fast-expanding fruit tissue.

Can I use Epsom salts on chilli plants?

Yes, as a targeted correction when you can see signs of magnesium deficiency. That’s interveinal yellowing on older leaves. Foliar spray at about one teaspoon per litre, every two to three weeks. Don’t spray preventatively on healthy plants.

Can I overfeed chilli plants?

Yes and it’s the most common feeding mistake. Overfeeding causes excessive leafy growth, salt build-up in the compost, root burn and reduced fruit set. A slightly underfed chilli plant still sets pods. An overfed one often produces little but leaves.

Final thought

The best growing seasons I’ve had weren’t the ones where I fed the most. They were the ones where I got the timing right, started light and let the plant show me what it needed. Chillies are tougher than people think and they don’t need coddling, they need consistency.

If the feeding is sorted and you’re still not getting the results you want, the next thing to look at is usually watering or potting-up timing. Those three things together cover most problems. Get those right and the pods follow.

You haven’t. Leggy seedlings are one of the most common problems chilli growers run into and they’re almost always fixable, sometimes within days.

This guide covers why it happens, how to rescue seedlings that have already stretched, and how to set things up so it doesn’t come back.

What Does “Leggy” Actually Mean?

A leggy chilli seedling has:

• A long, thin stem with wide gaps between the leaves.
• A plant that leans, flops, or can’t hold itself upright.
• Sometimes pale or washed-out colouring.

It’s not a variety thing. It’s not your fault either, exactly. It’s your seedling telling you something in its environment is off and nine times out of ten, that something is light.

Prefer to watch a video on this topic? Click the link below:

Why Chilli Seedlings Go Leggy

1. Not Enough Light (the Big One)

When light is too weak, chilli seedlings stretch upward trying to find more of it. They’re doing exactly what they’re supposed to do in the wild, growing toward the sun. The problem is that in your propagator or on your windowsill, there’s not enough sun to actually reach.

Common causes:

• Windowsill light (especially in the UK between November and March) that’s just too weak.
• A grow light that’s further away than it should be.
• Light that’s only on for a few hours a day.

If you change nothing else, change the light. Everything else is secondary.

2. Too Warm With Weak Light

Heat mats and warm rooms are great for germination. But once the seedlings are up, warmth speeds growth and if the light isn’t keeping pace, that growth becomes spindly rather than compact. Basically, the plant is growing fast but not building anything useful.

3. No Airflow

Still air encourages thin stems. A bit of movement, even just a small fan on low, helps seedlings develop thicker, sturdier growth. It’s the same reason plants grown outside tend to be stockier than ones raised indoors.

4. Overwatering and Humidity Domes Left On Too Long

Wet compost combined with a sealed humidity dome can cause weak stems and, in some cases, little bumps or aerial roots forming up the stem. The plant is essentially trying to find moisture wherever it can.

How to Fix Leggy Chilli Seedlings

Step 1: Fix the Light Immediately

If you’re using a grow light, move it closer. If you’re on a windowsill, consider adding a proper light. UK spring daylight, especially January through March, isn’t strong enough for sturdy seedlings on its own.

You want light coming from above, not sideways. Sideways light is why plants lean toward windows.

Step 2: Add Gentle Airflow

A small fan on its lowest setting, just enough to make the seedlings wobble slightly, will start building stronger stems within a week or two. Don’t point it directly at them at full power. Just a light, consistent breeze is all you need.

Step 3: Pot Them Up Deeper (The Main Rescue Move)

This is the one most people don’t know about. Chillies can grow new roots along a buried stem. That means when you pot up, you can bury the leggy section underground and end up with a much more stable, better-rooted plant.

When you pot up, bury the stem right up to the first true leaves.

Not the seed leaves (the round cotyledons that came first). The first proper chilli leaves. Keep those above the soil; let everything below go under.

How to Pot Up a Leggy Seedling Properly

1. Choose a deeper pot than you think you need. You need enough depth to bury that stem without cramming the roots.
2. Handle it by a leaf, not the stem. Stems bruise easily. Leaves are more forgiving.
3. Plant it deep, up to the first true leaves. Everything below that line goes underground.
4. Firm the compost gently. Remove big air pockets but don’t compact it.
5. Water once to settle it in, then hold back. Let the compost dry a bit before the next watering.

You can overdo it. Don’t bury the true leaves and don’t keep the compost soaking wet after potting up. Wet compost + buried stem = rot risk. The goal is deep enough to stabilise, not underground entirely.

Why Are There Roots Growing Above the Soil?

This one comes up in the community fairly often. If you can see little bumps or root-like growths forming up the stem, it’s almost always down to too much moisture early on.

Typical causes:

• Humidity dome left on for weeks after germination.
• Compost kept constantly wet.
• Very little airflow in the grow space.

If you’re potting up anyway, just bury those aerial root bumps along with the rest of the stem. They’ll turn into proper roots once underground.

How to Prevent Leggy Seedlings Next Time

None of this requires expensive kit. It’s just about getting the conditions right from the start.

• Light: Strong, from above, switched on early after germination. Keep your grow light close enough to matter.
• Temperature: Warm for germination, slightly cooler once they’re up. Not cold, just not a sauna either.
• Watering: When needed, not on a schedule. Check the compost. Let the surface dry slightly between waterings.
• Airflow: A gentle fan. Thin stems are built in still air; thick ones need a bit of movement.

If you only do one thing: fix the light.

If you’re new to growing chillies then this article might be of interest too: Grow Chillies at Home Easily: The Bare Minimum You Need

Common Mistakes (Easy to Make, Easy to Fix)

• Leaving the humidity dome on for ages because the seedlings look comfortable.
• Running a heat mat after germination when the light isn’t strong enough to match the warmth.
• Keeping the grow light far away out of fear of burning the seedlings (most growers do this).
• Watering on autopilot instead of checking whether the plant actually needs it.

Seedlings don’t need constant attention. They need the right conditions. Get those right and the plant does the hard work.

Quick Recap

If your chilli seedlings are already leggy:

1. Move the light closer (or add one).
2. Add gentle airflow.
3. Pot up deep: bury the stem to the first true leaves.

To stop it happening again:

1. Strong light as soon as seeds germinate.
2. Don’t run it too warm with weak light.
3. Avoid constantly wet compost.
4. Add airflow.

For more tips on chilli seedling care, go to Chilli Seedling Care: Expert Tips.

Got a question about your seedlings? Drop it in the comments or bring it to the next livestream, it might just end up in the next article.

People overcomplicate chilli growing. After decades of doing this and getting it wrong as often as getting it right, I can tell you that the chilli growing fundamentals are genuinely simple. Yes, there are things you can add to improve your results. But you don’t need them to get started and you don’t need them to grow a decent harvest.

What You Actually Need (The One-Line Version)

Stick a seed in some soil, keep it warm until it germinates, give it light and water, feed it now and then. That’s it. By the end of the season, you’ll have chillies.

Everything below is the practical detail behind that one line.

If you’d rather watch my video on this then click below:

1. Seeds: Free or Bought

Everything starts with a seed. You can grab quality seed from chillichumpseeds.com or simply save seeds from a chilli you’ve already eaten.

The key: use fully ripe fruit. Jalapeño, for example, are green when unripe and red when ripe. Cut it open, take a few seeds, let them dry out fully, then plant.

Supermarket chillies are often cross-pollinated, so you might not get an identical plant, but you’ll still get healthy, productive results, and possibly something completely unique. Best of all, since you already bought the chilli to eat, the seeds are essentially free. For more information on saving chilli pepper seeds – take a look at this article: Save Pepper Seeds – How to Harvest Chilli Seeds.

2. Germination: Warm and Moist Is All You Need

Chilli seeds love warmth, especially heat-lovers like habaneros and other Capsicum chinense varieties. Drop seeds into cold compost on a draughty windowsill and they’ll sulk for weeks, or rot.

You don’t need a fancy propagator. Here’s the no-fuss method:

• Fill a small takeaway tub with cheap seed compost (not garden soil).
• Plant seeds at roughly the same depth as the seed’s length.
• Keep the compost damp, not soaked.
• Cover with cling film or a lid to hold in moisture.
• Place somewhere warm. The top of the fridge works brilliantly, or near anything that gives off gentle heat.

When the first green shoots appear, remove the cover and move them somewhere bright.

Check out Germinate Chilli Pepper Seeds Like a Pro for more detailed info.

3. Light: The Thing Most People Get Wrong

Once seedlings are up, light is everything. A south-facing windowsill (north-facing if you’re in the southern hemisphere) is your best free option.

If your seedlings are growing tall and spindly with big gaps between the leaves, that’s called being “leggy” and it just means they need more light. Move them closer to the window, or supplement with a cheap desk lamp or basic LED shop light positioned close to the plants.

You don’t need expensive LED grow panels to start. In my early days I used fluorescent tubes and cheap CFLs. They work.

4. Potting Up: When to Move Them On

When your plant has three or four sets of true leaves, it’s time for a bigger pot.

You don’t need special containers. Old ice cream tubs, takeaway boxes, even a cut-down water jug are all perfectly good. I tend to pot up in stages to encourage strong root development, but if you want to keep things simple, sowing into a larger pot from the start works too.

Just make sure whatever you use drains well. Use decent compost or garden soil. Chillies are hungry plants and will thank you for it.

5. Feeding and Watering

Two things kill more chilli plants than anything else: overwatering and not feeding at all.

Watering: Keep the soil moist but never waterlogged. Always let excess water drain away freely. If in doubt, let the top inch of soil dry out before watering again.

Feeding: Tomato feed is my go-to, it’s cheap and works brilliantly. Seaweed fertiliser is another favourite, gentle enough to use from seedling stage all the way through harvest. Start at half strength and feed every few waterings. Don’t overdo it.

6. Flowers, Fruit and Saving Seed

By the end of the season, flowers will set and develop into pods. Pick them when they ripen and enjoy them.

Want to grow the same plants again next year? Save seeds from fully ripe pods, dry them out properly and store in a cool, dry place. Do this season after season and you start developing plants that are genuinely yours, adapted to your climate, your setup, your taste.

The Bare Minimum Grow Chillies at Home Checklist

Everything you need to get started:

• Seeds: bought, or saved from a ripe supermarket chilli.
• Cheap seed compost: avoid raw garden soil for germination.
• Small containers: for germination, larger pots for growing on.
• Warmth: top of the fridge or somewhere that gives off gentle heat.
• Light: a sunny windowsill or basic lamp to stop seedlings going leggy.
• Simple fertiliser: tomato feed or seaweed, used at half strength.
• Patience: and a watering routine: moist, not waterlogged.

What to Add When You’re Ready to Level Up

Once the basics feel natural, there’s plenty you can add to improve your results: propagators, proper grow lights, a greenhouse or polytunnel, basic automation for watering and temperature. All of those things help. None of them are required to grow a decent plant and a good harvest.

FAQ

Can I use seeds from a supermarket chilli?

Yes. Harvest from a fully ripe pod, dry the seeds and plant. They may not grow true if the parent was cross-pollinated, but you’ll still get healthy plants and possibly something completely new and interesting.

How deep should I plant chilli seeds?

A reliable rule of thumb: as deep as the seed is long. That works for most small seeds.

Where’s the best spot to keep seed trays warm?

Top of the fridge is a classic. Anywhere that gives off gentle, consistent heat will do. Keep trays covered until germination, then remove the cover and move them straight to light.

My seedlings are leggy, what do I do?

They need more light. Move them to a sunnier windowsill, or get a basic lamp positioned close to the plants. Give them as many hours of good light as you can.

What fertiliser should I use?

Tomato feed or seaweed fertiliser. Start at half strength, feed every few waterings, and make sure the compost drains freely so roots don’t sit in wet soil.

Can I plant straight into a large pot from seed?

Yes, but it’s harder to keep a large pot warm during germination. Starting small and potting up is usually easier, and tends to produce stronger root systems.

If this helped, and you’d like guides on making hot sauce, fermentation or low-tech growing setups at home — let me know in the comments. Until next time, stay spicy.

I know what you’re thinking: “Shaun, it’s freezing outside, surely starting chilli seeds now is madness?” Your chilli seeds don’t actually care what’s happening outside though. They care about three things: warm compost, steady heat and not drowning. Everything else is just making your life easier so you can repeat the process next year without tearing your hair out.

This article will give you some of the basics and some of my methods with links to other resources to help you get the 2026 season off to a great start!

Why I Start Seeds in the Dead of Winter

Superhot chillies need time. If you want big, healthy plants that actually give you ripe pods before the season ends, you need to get them going early. Simple as that.

The trick is understanding that you’re not growing anything outside yet. You’re just creating this little warm bubble where seeds can wake up and get cracking. If you’ve got a heated propagator (or even just a heat mat) and some grow lights, what’s happening outside becomes completely irrelevant. It’s all about the temperature where the seed is sitting – in the compost.

For more detailed info, read ‘When to Plant Peppers – The Best Time‘ and ‘Planting Super Hot Chilli Pepper Seeds: A Comprehensive Guide‘.

Three Rules for Quick and Strong Chilli Seedlings

When I’m sowing at the beginning of the season, I stick to three basics which helps everything else fall into place and gives me a brilliant start to the season:

First up, warm, airy compost. Your standard multipurpose stuff can be a bit dense and heavy. Dense compost holds water. Too much water sitting around seeds slows germination and can suffocate the roots before they even get going. So I do two things to it: I sieve out the lumpy bits (so every cell feels the same), and I mix in a handful of vermiculite. Basically you’re turning “muddy sponge” into “fluffy sponge”, and seeds absolutely love fluffy.

Second, organisation. Sounds boring, I know. But when you’re sowing hundreds of seeds, if you don’t have a system, you’ll end up with labels that don’t match, varieties in the wrong cells, and this one tray of “mystery chillies” that you’ll spend all season pretending was intentional. I plan the tray layout before I plant anything: top left to bottom right, every time. I keep my seeds grouped by variety in little containers, so I’m not rummaging around mid-sow trying to find the next packet.

This is where SeedsIO really earns its keep for me. I use the tray planning feature to map out each cell before planting anything. I can tag trays with colours and IDs like “T1 (green)”. That way I know exactly what’s where, and next year I can just do it again without having to think too hard about it. Fast sowing is great. Fast sowing without mistakes is better.

Third, steady heat and humidity. I set my propagators to 28°C. Thermostats don’t hold one perfect number, mine usually floats between 27-29°C, and that’s absolutely fine. This combination of warmth and high humidity is what gets you faster, more even germination.

Can it be too hot? Yes it can, but you would be surprised how hot you can go! However I would try stay below 32℃ (90℉)

The Bit Most People Skip: Warm the Compost First

This is going to sound obvious but honestly, most people miss it: cold compost is a germination killer. While you will still get germination, it will just take longer.

Before I sow anything, I put the filled trays into the propagator area for at least 24 hours. Why? Because if your compost takes a full day to warm up after you’ve already sown the seeds, you’ve lost time straight away. When you start with warm compost, you get quicker sprouting, more even germination and way less of that “why are only three seeds doing anything?” panic that we’ve all had.

My Sowing Workflow (What I Do Every Time)

Here’s exactly what I do, in order:

1. Plan the tray layout in SeedsIO – get the varieties and cell positions mapped out.
2. Warm the filled compost in the propagator or grow area for 24 hours.
3. Make the holes with a dibber or pencil (Rule of thumb: twice the depth as the length of the seed).
4. Soak seeds appropriately (longer for older seeds. Fresh seeds don’t strictly need this, but it does help).
5. Label trays clearly (this saves so much hassle later).
6. Into the propagator at target temperature.

That’s it. Nothing fancy. Just repeatable and effective.

Propagator Settings: what I run for Superhots

I run my 100W propagators at 28°C. These particular ones are brilliant because they help keep temperatures stable even when the potting shed is cold. The Stewart Variable propagator is a favourite of mine. But if your seed starting space is relatively warm already, then a heatmat under a cheap propagator will do the job. Just bear in mind that the power (watts) of your heat element will dictate how much warmer than the ambient temperature your seed trays can get. For example with my 100W propagators you see in the video, I can raise my temperatures at least 10°C above the ambient temperature.

For humidity, I keep a shallow layer of water in the base of the propagator. This does two useful things: it keeps humidity up (which seeds love), and it acts as a kind of thermal buffer that helps spread the heat more evenly.

Some seed trays don’t have grooves underneath though, which caught me out when I started. If they’re sitting flat on a surface with water around them, the water can pool underneath and just stay there. That leads to miserable roots and seedlings that collapse.

I used to raise trays on little spacers, which works but it’s fiddly. The better fix? Put each seed tray on a small drip tray so water can’t get trapped underneath. Simple and it actually works.

Quick Troubleshooting (When Things Go Wrong Starting Chilli Seeds)

Seeds Aren’t Germinating? 

First thing to check is compost temperature. Cold compost is the most common reason seeds just sit there doing nothing. Also make sure your humidity and heat are staying steady inside the propagator. When you check the temperature, don’t rely on your thermostat. Test the temperature at the soil level.

Seedlings Wilting or Getting that Horrible Damp-off Thing? 

This is usually too wet, not enough air, or poor drainage. Make sure water isn’t pooling under flat-bottom trays: raise them or use drip trays. Once seedlings pop up, start giving them fresh air by cracking the lid open.

You Planted Way Too Many Seeds? (We’ve all done it) 

Welcome to the club. Pot up the strongest seedlings first, and thin the rest over time. And maybe, possibly, plan your space and pots before sowing next year? (Who am I kidding, I’ll never learn either.)

Start Chilli Pepper Seeds FAQ

What temperature to germinate superhot chilli peppers? 

Aim for 28°C. Small swings between 27-29°C are completely normal and fine.

What temperature to germinate chilli peppers like Jalapeno or Cayenne? 

28°C works well for these too (I stick to this for all my seeds). However you can get away with lower temperatures, down to around 20°C (68°F), but below this and your germination will be slower.

What temperature is too hot to germinate chilli peppers? 

Try stay below 32°C (90°F), although chilli peppers can survive higher temperatures, its not ideal.

How should I prep the compost? 

Use ordinary compost, sieve it to remove lumps, mix in vermiculite to lighten it and warm it for 24 hours before sowing.

How do I stop drowning the roots? 

Make sure water can drain away from the base. If your trays are flat-bottomed, raise them on spacers or sit them on drip trays.

Do I need special equipment for hundreds of seeds? 

No special compost needed. Organisation matters way more than fancy kit. A warm propagator, clear labels and a simple sowing order make it manageable.

A Quick Word on Seed Quality

Good seeds won’t fix cold compost or overwatering… but they absolutely give you a better start.

If you want good quality chilli seeds, grab them here: https://chillichumpseeds.com

Final notes

Winter seed starting is basically this: build a warm, humid bubble and keep it organised.

Warm compost. Steady heat. Decent drainage. Proper labels.

Do that, and you’ll be staring at little green hooks popping up in a few days, grinning like an absolute idiot. Which is exactly the right response, by the way.

Once your chilli seeds have sprouted, you’ll need this article Chilli Seedling Care: Expert Tips

It is that time of year again. I pick six chilli varieties each season for us to grow together, same plant and same timing, so we can compare progress through the season. If you want a guided way into chilli growing and a community to share results with, grab a kit and grow along.

How I chose this year’s six

I usually start with 12 to 15 candidates and narrow them down based on how they grow, how they taste and how well the seeds germinate. This year I kept a handful of kits aside for Patreons and YouTube members for the first week, just in case we run out of stock!

What is in the 2026 Seed Kit

This year’s selection focuses on flavour, usefulness and a bit of fun. There is something for everyone: mild, medium, hot and completely insane. Below I run through each variety and why I chose it.

CC Fushimi

This is my selectively bred take on the Japanese Fushimi. About four or five years ago I noticed variegation in one of my Fushimi plants: “half-white leaves, crinkle textures and striped pods”. I have been breeding that out for consistency, keeping the beauty while making it more reliable.

The pods are mild and mostly sweet, brilliant in the kitchen. I use them fried or fresh in a stir fry, and they make an excellent filler inside hot sauce. It is one of those plants that is as beautiful as it is useful.

Kimchi pepper

If you love kimchi, you will love this. This is the pepper I use to make the Gochugaru, the red flakes that give kimchi its colour and flavour. I sourced these seeds from a grower in Korea and they dry to a rich, dark red with a truly incredible aroma when drying.

The pods are thin skinned and I dry them slowly to protect the colour and the seeds. The colour is perfect for proper kimchi flakes, and the heat is gentle enough to notice but not overpowering. That balance makes them ideal for kimchi, soups, stews and even sauces. I have already used them in a hot sauce that came out beautifully and I may share that recipe soon.

Chinesicher Runzelhout

The name is a mouthful and roughly means Chinese chilli in German, but it was an experiment that paid off. It turned out to be one of the earliest and most productive plants of the year. The pods are gnarly, crinkled and very attractive.

Heat is mild to medium, about a poblano level. It performed fantastically in my hydro setup and I will try it in soil next season. If you want an easy, early producer that reliably gives loads of pods, this is a really fun plant to grow.

Rocoto Manzano

If you have never grown a capsicum pubescens, this is a special one to try. Look out for black seeds and hairy leaves. The pods are thick and juicy, roughly golf ball size, and begin very sweet and succulent on the palate.

Do not be fooled by that initial sweetness because these rapidly climb to around 150,000 Scoville. They are particularly well suited to cooler climates, like the UK, because they keep producing late into autumn when other plants are fading. If you need a variety that extends your season, these will please you.

CC Chonky Cayenne

This is a new variety I have developed over roughly four years. It started when I noticed some Cayenne plants producing shorter, fatter pods with the same flavour and heat but thicker walls and more flesh. I wanted more usable weight for sauce making, so I selectively bred for higher meat to seed ratio.

The result is the CC Chonky KN: same KN flavour, thicker juicier pods and far better yield for making sauces. It is very productive and performs well in cooler climates. I use KN a lot as a base in sauces, including in my Blazing Buffalo Extreme, and Chonky gives me much more usable flesh per pod.

MA Warthog

This one is for the heat freaks. The MA Warthog comes from Matthew Arthur’s project and is possibly the hottest thing I have ever eaten. It is not fully stable yet and my grow outs showed a lot of variation, but one red plant stood out as the healthiest, most productive and unquestionably the hottest.

I have saved seed from that red variety and that is what is in this year’s seed kit. I also had yellow and peach variants which I will be isolating and stabilising over the next few seasons. There will be a few packets of those variants on the Chili Chump Seeds website as they become available.

The plant itself is a beast. One plant produced four massive trays full of pods. As per the originator’s request, all profits from the warthog seeds will go to children’s charities. For 2026 I want to have some fun: let’s see who can grow the biggest MA Warthog. Tag me or send photos through my website and I will feature the best ones on the channel. If I can find a sponsor, there might even be a prize.

Where to get the Seed Kit

The ChilliChump Seed Kit 2026 is available now at chillichumpseeds.com. Quantities are limited but I have more stock this year than last year, so you should be able to get one. While you are on the site you will also find other seed varieties restocked, including old favourites and some brand new varieties I am excited about.

How to grow along with me

Order a kit, sow the seeds at the same time as me, and we can track progress through the season. Use the same plant choices and timing and share regular updates. Tag me on social or send photos through the website and I will show the best results.

Quick highlights

• CC Fushimi: mild, sweet, beautiful variegation and striped pods, great for frying and sauces.
• Kimchi pepper: thin-skinned, dries to perfect gochugaru colour, gentle heat, ideal for kimchi and sauces.
• Chinesicher Runzelhaut: early, prolific, mild-medium heat, excellent in hydro and soil.
• Rocoto Manzano: capsicum pubescens, hairy leaves, black seeds, sweet then extremely hot, great for cool climates.
• CC Chonky Cayenne: meatier KN pods, higher yield for sauce making, productive in cooler climates.
• MA Warthog: super hot, high variability but extremely productive, profits to children’s charities, grow contest for biggest pod.

FAQ

What is included in the ChilliChump Seed Kit 2026?

The kit contains seeds for six chilli varieties selected for the 2026 season: CC Fushimi, Kimchi pepper, Chinesicher Runzelhaut, Rocoto Manzano, CC Chonky Cayenne and the MA Warthog. It is designed so we can all grow the same plants and compare results.

Where can I buy the seed kit?

You can buy the kit at chillichumpseeds.com. There is more stock this year than last year but quantities remain limited.

Are the seeds suitable for cooler climates like the UK?

Yes. Several of the varieties, including Rocoto Manzano and CC Chonky Cayenne, are especially well suited to cooler climates and will keep producing late into autumn.

Is the MA Warthog safe to grow and eat?

The MA Warthog is a super hot chilli and should be treated with respect when handling and eating. The red variety included in the kit is the one I selected for heat and productivity.

Can I grow along with you and share my results?

Absolutely. Sow the kit at the same time as me, tag me or send photos through my website and I will share the best grows. There will be a friendly competition to grow the biggest MA Warthog this season.

Do you restock other seed varieties?

Yes, the online shop contains restocked favourites plus some new varieties. Check chillichumpseeds.com for the latest availability.

Final notes

This year’s seed kit is all about flavour, usefulness and fun. Whether you want mild chiles for cooking, peppers tailored for kimchi, meaty pods for sauce making, or a super hot challenge, there is something here for you. Grab your kit, grow along with me and let us see how the season unfolds.

Stay spicy!

What You’ll Need to Get Started

Making your own DIY free organic fertiliser is surprisingly straightforward. Here’s all you need:

• A bucket: Any size will do, but ideally something with a lid to keep things contained and make the process easier.
• Rainwater: This is essential because rainwater contains beneficial microbes and no chlorine, unlike tap water. If you only have tap water, leave it out for a while so chlorine can evaporate before using it.
• Plant material: Weeds, grass clippings, or other garden scraps make excellent base materials. Instead of throwing these away, you’re turning them into a valuable resource.

Boosting Your Fertiliser’s Nutrient Content

While standard garden waste will produce a balanced nutrient mix, you can supercharge your fertiliser by adding specific plants:

• Comfrey: This powerhouse plant is packed with potassium, which is especially beneficial for fruiting plants like tomatoes and chillies. Adding comfrey to your mix can improve the size, taste, and health of your harvest.
• Clover: Often mistaken for a weed, clover is excellent for fixing nitrogen in soil and staying lush even in drought conditions. It provides a natural nitrogen boost to your fertiliser, helping plants grow strong and green.

Preparing Your Plant Materials

To speed up the decomposition and fermentation process, it’s helpful to chop or break up your plant matter. You can use garden shears or an edging tool for this. Breaking down the weeds and clippings increases the surface area, allowing microbes to work faster and more efficiently.

For an extra nutrient boost, consider adding worm bin leachate (sometimes called worm tea). This liquid is the drippings collected from worm bins and is teeming with beneficial microorganisms that accelerate fermentation and enrich the fertiliser.

Fermentation: The Secret to Rich Organic Fertiliser

Once your bucket is filled with plant material and water, it’s important to keep everything submerged. Use a rock, bricks, or similar weight to press the plant matter below the surface. This helps create an anaerobic environment where fermentation can happen effectively.

Do not seal the bucket completely. Leaving the lid loose allows gases like CO₂ and methane to escape, preventing pressure build-up and messy spills.

Place the bucket outside in a sunny spot. The warmer the weather, the faster the fermentation process will proceed. Patience is key here—give it about a week before checking back.

Checking and Handling Your Fertiliser

After a week, open your bucket carefully—it will likely have a strong, pungent smell. This is normal and a sign that fermentation is underway. You’ll notice bubbles rising in the liquid; these are CO₂ produced by the microbes working their magic.

The plant material will have broken down significantly. You can leave some residue in the bucket to maintain the beneficial bacteria and speed up future batches. Remove excess solids if the bucket becomes too full, and add those to your compost pile. Thanks to fermentation, any seeds in the mix will no longer be viable, so they won’t cause weeds in your compost.

Using Your Concentrated Fertiliser Safely

The liquid you’ve produced is highly concentrated and should never be applied directly to plants without dilution. Stir the liquid well to mix the nutrients evenly, as some will settle at the bottom.

Mix your fertiliser at a ratio of about 10 parts water to 1 part fertiliser. Use a watering can or jug to dilute it properly before feeding your plants.

Feeding Schedule for Best Results

To maximize the benefits of your free fertiliser, apply it regularly but not every time you water. During early growth stages, feeding once every two weeks works well. When plants are actively growing and fruiting, increase to once a week or even twice a week for a nutrient boost.

For drip irrigation systems, avoid using this fertiliser as it can clog the emitters. Instead, apply it directly to the soil around your plants.

Keeping Your Fertiliser Cycle Going

One of the best parts about this method is that it’s sustainable and self-perpetuating. After each batch, leave some of the fermented plant matter in the bucket and keep adding fresh weeds or grass clippings. Mash them down and let the fermentation process restart quickly thanks to the existing beneficial bacteria.

This continuous cycle means you’ll always have a supply of nutrient-rich, free fertiliser for your garden, reducing waste and improving soil health season after season.

Conclusion: Free Fertiliser Made Simple and Effective

Creating your own organic fertiliser from garden leftovers is a rewarding way to support your plants naturally. By using a bucket, rainwater, and common garden waste like weeds and grass clippings, you can produce a potent fertiliser that’s rich in essential nutrients. Enhancing your mix with plants like comfrey and clover further boosts potassium and nitrogen, key elements for healthy, fruitful plants.

The fermentation process, aided by worm bin leachate and proper submersion, transforms ordinary plant scraps into a powerful liquid fertilizer. Remember to dilute it before use and follow a sensible feeding schedule for best results. Plus, keeping the cycle going means you’ll enjoy a steady supply of free fertiliser all year round.

Give this organic fertiliser method a try and watch your garden thrive sustainably and economically. Stay spicy and happy gardening!

Don’t panic though. Just because we’ve gone from “pleasantly mild” to “surface of Mercury” doesn’t mean your summer chilli plant care has to be a nightmare. Here’s how to keep your chillies happy when British weather decides to cosplay as the Sahara.

Summer Chilli Plant Care: Protecting from Heat Damage (Yes, In the UK)

Shade Solutions for Growing Chillies in Hot Weather I know, I know… providing shade for heat-loving plants in Britain feels like something from a parallel universe. But when temperatures consistently hit above 30°C (86°F), even your superhots start crying for mercy. Chuck some shade cloth over your polytunnel during peak afternoon heat, or use those old bedsheets you’ve been meaning to chuck out (shhhh… don’t tell Mrs ChilliChump).

If you’re growing chillies in containers and you can move them, move those pots somewhere with afternoon shade. Your habaneros will thank you for the break from the heat. For some extra tips on how to grow habaneros, check our this article: How To Grow Habanero Peppers 101

Air Circulation for Hot Weather Chilli Growing Stagnant air above 30°C is basically a death sentence when growing chillies in hot weather. Get some fans going in that greenhouse-turned-sauna, or make sure your outdoor pepper plants aren’t trapped in dead air pockets. Good airflow is essential for summer chilli plant care—it prevents overheating and keeps disease at bay, because the last thing you need is your stressed chillies getting attacked by fungal nasties too.

3 Tips to Get a MASSIVE Chilli Pepper Harvest

Mulching: Essential Summer Chilli Plant Care Pile on the organic mulch like your pepper harvest depends on it (because it does). Straw, newspaper, grass clippings… whatever you’ve got lying about. This isn’t just about looking tidy; that mulch layer is crucial for growing chillies in hot weather. It keeps your chilli roots cool and retains precious moisture that would otherwise evaporate.

Watering Chillies in Hot Weather: Summer Care Essentials

Deep, Consistent Watering for Summer Chilli Plant Care When growing chillies in hot weather, your plants need deep, consistent watering to maintain even soil moisture, but don’t turn them into swimming pools. Water early morning to reduce evaporation, then check again in the evening, especially during heatwaves.

Drip Irrigation for Hot Weather Chilli Growing If you’re getting serious about growing peppers (and the weather’s not improving), invest in a simple drip setup for your chilli garden. Set it on a timer and let it do the work while you’re having your morning coffee. Perfect for summer chilli plant care – consistent, slow watering that delivers moisture directly to the root zone without waste. You can see how I set mine up here: Avoid these greenhouse setup mistakes!

Avoid These Greenhouse Setup Mistakes!

Container Care for Chilli Plants If your chillies are in pots, check that soil moisture regularly. Containers dry out faster when temperatures soar.

Soil Moisture Testing for Pepper Plants Stick your finger 2 inches into the soil around your chilli plants. Dry? Time to water those peppers. Still damp? Leave it another day. Your finger’s still more reliable than any fancy gadget for checking if your chilli plants need water.

Humidity Management for Stressed Chillies

Greenhouse Humidity for Chilli Plants In your greenhouse (which is now basically a tropical conservatory whether you planned it or not), try “dampening down”… wet the floors and surfaces to raise humidity and cool the air. It’s like creating your own personal rainforest, minus the exotic birds.

Misting Chilli Plants A gentle misting of your chilli foliage can help lower leaf temperature and reduce stress. Just don’t go mad with it… too much moisture can invite fungal problems to your pepper party.

Creating Humid Microclimates for Summer Chilli Care Place your potted chillies on trays filled with damp gravel or clay pebbles. It creates a lovely humid microclimate around your plants, like a spa day for stressed peppers.

Feeding Chilli Plants During Summer

High-Potassium Feeding for Pepper Plants Feed your chilli plants with high-potassium liquid fertilizer (tomato feed works a treat) weekly once flowering starts. This supports fruiting even when your plants are dealing with challenging conditions.

Summer Feeding Schedule for Chilli Plants For young pepper plants, start with dilute feed and increase strength as they mature and adapt to our new weather patterns. Don’t overwhelm already stressed plants with massive nutrient dumps.

Plants Need a Drink Too Remember to water with plain water too in-between the feeding! You don’t want to overdo it with the fertiliser, especially with the warmer weather.

Well-Draining Soil for Chilli Plants Use well-draining soil to prevent root rot, because waterlogged roots in extreme conditions is a recipe for disaster. Your chillies need moisture, not swamp conditions. For my recipe (honed over years) take a look at this video: Ultimate Chilli Soil Recipe: Get Perfect Peppers!

Gradual Acclimatisation for Chilli Plants

Preventing Sunburn on Pepper Plants If you’re moving chilli plants outdoors or into stronger sunlight, acclimatise them gradually over a week or two. Even heat-loving peppers can get sunburned.

Monitoring Stress in Chilli Plants

Signs of Stress in Pepper Plants Watch for wilting, leaf scorch, or blossom drop on your chilli plants. These are your peppers’ way of saying “Crikey, it’s a bit warm, isn’t it?” Adjust your watering or shading accordingly.

Emergency Protection for Chilli Plants

When those 35°C+ days hit (yes, they’re a thing now):

• Instant shade for pepper plants: Any cover you can find… umbrellas, parasols, that gazebo gathering dust in the shed.
• Emergency watering for chilli plants: Deep soak that soil, even if it’s midday.
• Humidity boost: Wet down greenhouse floors, mist around (not on) plants.
• Monitor constantly: Stress can destroy pepper plants faster than you can say “global warming”.

The New Normal for UK Chilli Growing

Here’s the thing… we’re not in Kansas anymore, Dorothy. Or rather, we’re not in the mild, drizzly Britain we remember from ten years ago. These extreme weather events are becoming the norm, not the exception. Your chilli plants might be naturally heat-loving, but even they have limits when temperatures consistently hit above 30°C.

The good news? Chilli plants that survive proper stress often bounce back stronger and produce better, bigger pods. It’s like they’re saying “Right then, if you want challenging conditions, I’ll show you what tough really means.”

Key Takeaways for Growing Chillies in Our New Climate

Bottom line: Welcome to Britain 2.0, where we need extreme weather management strategies for our gardens and sun cream isn’t just for holidays anymore. Set your chilli garden up for these new conditions, and your pepper plants will keep producing while your neighbours wonder when Britain turned into Spain.

Whether you’re growing mild jalapeños or face-melting superhot chillies, these protection strategies will keep your pepper harvest going strong through whatever our increasingly dramatic weather throws at us.

Remember, successful chilli growing in modern Britain means adapting to our new reality. Your pepper plants are tough… they just need the right support to thrive when our “temperate” climate decides to have tropical mood swings.

Trust me… a bit of prep now saves a lot of tears later. Your chilli plants (and your sanity) will thank you for it in our brave new sweaty world.

Key Similarities Between Polytunnels and Greenhouses

Both provide shelter and protection for plants from too much rain and wind, and extend the growing season possibilities.

Shelter and Protection for Plants

When it comes to greenhouse vs polytunnel, both act as protective sanctuaries for plants, shielding them from extreme weather and pests. However, they do so in slightly different ways:

• Greenhouses: With their rigid frames and glass panels, greenhouses are particularly effective at insulating against cold weather, making them ideal for tender plants and seedlings. The clear glass not only keeps plants warm but also enhances the aesthetic appeal of your garden. Making them a perfect space for mastering chilli seedling care.
• Polytunnels: Known for their flexibility and cost-effectiveness, polytunnels use metal hoops covered with polythene to create a warm, protected environment. The polytunnel gardening setup is less permanent than a greenhouse, making it easier to move or adjust as needed.

Extension of the Growing Season

Both greenhouses and polytunnels allow you to start your planting season earlier and extend it later into the season, which is a boon for producing a more abundant harvest. Here’s how they compare:

• Greenhouses: Glass or polycarbonate greenhouses are excellent at retaining heat, which can be a major advantage for heat-loving plants.
• Polytunnels: While they heat up quickly, polytunnels also lose heat faster than greenhouses. However, they can be quickly adjusted to accommodate sudden weather changes, providing a more adaptable environment for a variety of plants.

Importance of Ventilation

I learned the hard way that good airflow is crucial no matter which you choose, to keep plants healthy. My first year growing chillies, I underestimated how fast a greenhouse can overheat on a sunny day.

The air got so hot and stuffy, my cherished plants wilted before my eyes. That painful lesson taught me that proper airflow is critical in both greenhouses and polytunnels to prevent diseases and manage internal temperatures:

• Greenhouses: Equipped with vents and sometimes automatic opening mechanisms, greenhouses offer sophisticated solutions to manage airflow, helping to keep the internal climate ideal for plant growth.
• Polytunnels: These structures typically include manual options for ventilation, such as rolling up the sides. Although this method is less refined than greenhouse systems, it is effective and straightforward to use.

One thing I learned last year – polytunnels get hot very quickly. Whilst some of my super hot chillies thrived, other chillies did not do so well with the heat.

Keep an eye on heat and moisture and be prepared to make changes.

Fundamental Differences – Greenhouse vs Polytunnel

The options differ in their structural materials, design, and flexibility. Polytunnels are usually made of polythene and are used for growing a variety of plants, while greenhouses often feature toughened glass panels and are designed to create the best possible growing conditions for specific plants.

Initial and ongoing costs also vary greatly between the two structures.

Structural Materials and Design

Choosing the right structure involves understanding the materials and construction of each option:

• Greenhouses: Offer durability and a classic look with materials like aluminum and glass. These materials are more resistant to weathering and can significantly enhance the visual appeal of your garden. But they take more time to install – why not watch the timelapse of my largest greenhouse being built?
• Polytunnels: Use simpler, more affordable materials like polythene stretched over metal hoops. This design allows for easier and cheaper modifications and expansions.

Initial and Ongoing Costs

Budget and value for money is a major consideration when choosing between a greenhouse and a polytunnel:

• Greenhouses: Demand a higher initial investment but generally have lower long-term maintenance costs, especially if constructed with durable materials like toughened glass.
• Polytunnels: Buying a polytunnel is cheaper upfront, they require the polythene covering to be replaced every few years, which can add to long-term costs.

Greenhouse vs Polytunnel: The Pros and Cons

Decision-Making Guide

When it comes time to deciding – greenhouse vs polytunnel, consider these factors:

1. Budget: Assess both the initial cost and potential long-term expenses.
2. Space: Whether you have a garden or an allotment, determine how much room you have and what structure best fits that space.
3. Climate: Match the structure to your local weather conditions—greenhouses for colder climates and polytunnels for areas with milder weather.
4. Plant Needs: Choose based on what you plan to grow. Delicate plants might thrive better in the controlled environment of a greenhouse, while hardier plants can benefit from the versatility of a polytunnel.

Greenhouse vs Polytunnel – Conclusion

In wrapping up, we’ve debated the pros and cons of greenhouse vs polytunnel and I’ve shared my thoughts and experiences, which I hope you found useful. We’ve covered practical factors like materials, cost, and purpose to guide you in making an informed decision.

Understanding these structures will lead to more efficient plant growth and better yields. 

Remember, deciding which structure is best is key to creating the perfect growing conditions for your plants in any climate.

Still not sure? Watch the video for a quick recap:

FAQs

1. What’s the main difference between greenhouse vs polytunnel?

The main difference lies in their structure and material. Greenhouses are often made of clear glass or plastic panels, offering more durability but at a higher cost. Polytunnels, on the other hand, use a metal frame covered with plastic sheeting—more affordable and easier to set up but may need replacing every few years.

2. Can both greenhouses and polytunnels extend my growing season?

Absolutely! Both constructions serve the same purpose—to protect your plants from bad weather conditions and create ideal growing conditions that can extend your growing season. Depending on where you are in the world and your setup it could provide you with year-round growing space.

3. Are there any cooling tips for greenhouses to prevent overheating?

Yes, indeed! To avoid vulnerable plants from overheating during hot days, you can shade or paint some of the glass to reduce the quantity of light coming in or keep all doors and vents open to achieve effective ventilation.

4. How often do I need to replace polytunnel covers?

Polytunnel covers typically need to be replaced every few years due to wear and tear from weather exposure—unlike greenhouses which types can last for many years without needing such frequent maintenance.

5. Which is better for taller plants, a greenhouse or polytunnel?

Greenhouses usually allow taller plants thanks to their solid structure with an opening on the roof or side vents that can also help manage temperature by providing similar cooling effects as found in commercial polytunnels.

6. How do shading needs differ between these structures?

Plants inside greenhouses might need more shading compared to those in polytunnels since clear glass can intensify sunlight exposure—polytunnels retain heat well but diffuse light more evenly across your plants.

I created a Beginners Guide to Growing Chillies in 2018, and I have been revamping it since 2022.

If you live in the UK, you’ll know that the weather is not ideal for chilli growing, but we can do a few things to optimize the process and maximize our chances of a bountiful harvest at the end of the season. 

How do you Germinate Chilli Seeds?

Many people ask, do I need to soak my seeds before planting them? 

I’ve tried various ways to improve the germination rate of chillies, and I’ve discovered that the best way is to try and replicate what happens in nature as closely as possible. 

So, if left up to nature, how do chillies spread their seeds far and wide?

As we know, most chillies are spicy, they contain capsaicin which burns, and it’s not just you and me that feel it, but other mammals do as well, so if a bear eats a Carolina Reaper, they will not be too pleased.  

Your dogs and cats will also not be delighted if you feed them Carolina Reapers, so please don’t!  

However, birds cannot sense the heat from capsaicin. The capsaicin, which makes chillies hot, does not affect birds whatsoever. Now it’s thought that this is a defence mechanism to help the chilli seeds be transported far and wide. Birds can spread those seeds further than mammals can. 

Now let’s consider what happens when a bird eats chillies and the seeds enter its stomach. The bird will fly off, and it’ll poop somewhere. Those seeds will propagate in the soil and become lovely chilli plants. Two things are happening: 

1. The bird poop is going to give those seeds nutrients to get started. 
2. The chemical scarification (the seed shell’s softening) happens in the bird’s stomach, allowing oxygen to get inside the seed to help the seed germinate. 

Scarification is very important for older seeds. It’s not so crucial for very fresh seeds, but still, it does help. Regardless of the age of my seeds, I now always follow the same process. 

The good news is that we don’t need the digestive fluids of a bird to be able to do our chemical scarification. But it might surprise you to know that you can get all you need from a nice cup of tea! The tannins found in English breakfast tea or chamomile tea work really well to replicate the process. 

Using Tea for Chemical Scarification Prior to Sowing Chilli Pepper Seeds

You don’t need to use a new tea bag; you can save up old tea bags and place them in a jug. Put some hot water in a jug with the tea bags and let that steep for about half an hour. Once the liquid is at room temperature, we’re ready to start the scarification of our seeds.  

Chemical Scarification with Hydrogen Peroxide

You can also use hydrogen peroxide for chemical scarification. You can buy a three per cent strength mix over the counter at a chemist or from amazon. There is an added benefit: if your seeds haven’t been appropriately dried or you’ve sourced seeds and the quality is questionable, hydrogen peroxide will help disinfect those seeds and eliminate any mould. 

You need a 30 to 1 mix for this process, which means 30 parts filtered water and one part hydrogen peroxide.

Tip #1: use gloves or a pair of small tongs! Touching the seeds can result in pain later, and they also tend to stick to your fingers!

I use small shot glasses to soak my seeds in as they’re cheap and reusable. Add as many seeds as you want to plant to the shot glass. You don’t need a lot of liquid, just enough to cover the seeds; you can use a squeezable bottle for ease to dispense the liquid. 

Make sure to label them, I write on the shot glass itself, but you can write a label and stick it on or use a tag and put it next to it. 

Soak the seeds for about 12 hours. I usually leave mine overnight.

Tip #2: to help you get better germination rates, put your seeds inside the fridge for a couple of days before soaking them in the tea. It tricks the seeds into thinking it’s gone through a winter cycle, and it’s now ready for spring when it starts warming up. Spring is when nature says, ‘
hey, we’ve got to start germinating.’

What Compost Should I Use to Sow Chilli Pepper Seeds?

Use good quality compost for germination. Just plain compost; make sure to sieve out any big particles to get a beautiful fine fluffy compost. You can buy compost, especially for seed starting, but it’s far more cost effective to purchase general compost because you can also use it when you pot up your chillies later in the season. 

If you’re planting various seeds, you’ll need a way to keep track of what you’ve planted. If you’re using seed starting trays, mark the rows horizontally and vertically and consider using my SeedsIO platform to record which varieties you’ve planted and where (it’s free).

If your compost has been sitting outside in the cold, let it come up to room temperature before you start planting your seeds.  

How Deep Do I Need to Plant My Chilli Seeds?

Fill your seed tray with compost. Place your seed on top of the soil, one or two per cell. You don’t need to bury the chilli seeds low down. 

If you want to ensure the success of that seed cell, planting a couple of seeds will allow you the opportunity to thin out the seedlings at a later stage.

Tip #3: seeds that float in the tea/hydrogen peroxide are not necessarily bad, so don’t throw them away.

The next step is to lightly cover the seeds with some of your compost.  

You can use things like vermiculite or perlite if you want to, but I like to use more of the compost I’ve already used. 

Don’t nudge your seeds into a different seed cell because you’ll be very upset when the chilli you get is not the one you expected!

I pat the compost down lightly, but you don’t have to do this. Just make sure that all your chilli seeds are covered, you don’t want them exposed to the air, and when you water them, you’ll be able to have another look and see whether any have been revealed. 

As an alternative to soil, you could use a coir plug. It’s essentially coconut fibre, you soak it in water, and it expands. You put the seed inside the coir. I don’t like using coir plugs too much. I find that it’s a lot simpler, cheaper and easier to move the seeds around when using soil.

What’s the Best Way to Water my Chilli Seeds?

For the initial watering, just use a spray bottle. Try to get the water to room temperature. You don’t want to use freezing cold water, and don’t use water from the tap if you can help it, as it contains chlorine. If you have to use water from the tap, let it sit in an open container for about an hour to let the chlorine evaporate.  

Unfortunately, sometimes it’s not just chlorine in the tap water; there’s something else called chloramine, which does not evaporate. Rainwater is perfect, so if, like me, you can collect rainwater off my greenhouses to use for watering, you’re all set!

If you can see any seeds poking out from the soil once you’ve watered them, just add more soil and make sure that they’re covered over.

Until your plants are outdoors, bottom watering is the best way to water your seeds. Typically you’ll have lights overhead, and if you don’t have lights, you’re going to have some sunshine, and if you’re watering from the top, it can cause a green film of algae on the soil.

Once you’ve settled the top of the soil in the cell using the spray bottle, you can also water from the bottom. You need to ensure that you’ve saturated the soil, so make sure that the water level is above the base. This needs to dry out over the next two or three days. The water will pull up into the soil once watered from the bottom. 

Cover the seed tray with a humidity dome to make sure that you keep the moisture inside. It’s a bit of a balancing act, but your seeds mustn’t dry out at this early stage. Until the seeds germinate, make sure that there’s always moisture in the air but that they’re not wet. Make sure that the humidity dome is on, and open the air vents to ensure the air can get in and out, but it will keep in the humidity. You should start seeing some condensation on the inside of the dome if it’s heating up correctly and if you’ve got enough water in there. At this stage, you do not need any light. 

Looking After Chilli Seeds During Germination

If you’ve got the humidity dome on your seed tray, look underneath every other day to make sure that it’s dry underneath the seed tray and that there’s no standing water. If there is any standing water, do not water them. If it’s dry underneath, then add some more water.  

You can also cover the seed tray with a towel to keep the warmth while the seeds germinate.

Do I Need Certain Temperatures to Germinate Chilli Seeds?

Chillies typically grow in warm conditions, and you’ve got to make sure that your chillies have the best start to life by trying to replicate that warmth. You want to reach around 28 degrees celsius, and for UK growers, that is not something we can offer naturally. 

I use heated propagators, but there are other ways you can heat your trays if you are doing this indoors. It’s a bit easier because you probably already have the heating on.   

Ensure there are no holes in your tray or put the tray inside another without holes. Place it on top of the fridge. Sometimes fridges will be pretty warm on the top, which should be enough to get the temperatures up for your chilli seeds. Satellite boxes can also be quite warm, but take care not to spill water near electrics. 

How Long Do Chilli Seeds Take to Germinate?

Many chillies should start germinating after about a week. Once the first shoots appear, you can expect more to follow in quick succession. 

Remember that super hots, like the Carolina Reaper, 7Pot Primo need a very long season. They can be some of the most challenging to get to produce fruit. In this dedicated article, I’ll describe how I get decent harvests from my super hots. 

If you’re a first-time grower, I recommend looking for the super chilli varieties as they’ve been bred to grow easily and provide a good crop. You’ll see results quite quickly with these. 

When Do My Seeds Need Light?

It is one of my favourite things to experience when growing chillies; when you see a little shoot come up, there’ll be cotyledons (small leaves) appearing above the soil. Once the cotyledons appear, I start putting light over my chillies. Learn everything you need to know about grow lights in this article.

Why are My Seeds Not Germinating?

There could be several reasons for this. It’s possible that the seeds were not planted in the right growing conditions, or that they did not receive enough water. Perhaps they were placed in an area without enough sunlight, such as a dark windowsill. It’s also important to consider the quality of the seeds themselves – if you buy chilli seeds online, make sure they are from a reputable source. 

Chilli seeds love warmth and moisture to sprout and grow well. 

Can I Grow Chillies from the Seeds in My Peppers? 

Yes, you can grow chillies from the seeds in your peppers. Simply save the seeds from ripe peppers, allow them to dry completely, and then plant them in soil. Make sure to keep the soil consistently moist and provide plenty of sunlight for optimal growth. In no time, you’ll have your very own homegrown chillies!

Here’s a useful article on saving seeds: Save Pepper Seeds – How to Harvest Chilli Seeds

Conclusion to Sowing Chilli Pepper Seeds

In wrapping up my top tips on chilli seed sowing, we’ve covered a lot of ground, from the importance of replicating natural processes like chemical scarification to the best practices for germinating and nurturing your chilli seeds into thriving plants. The journey from seed to harvest is filled with opportunities for learning and experimentation, and it’s clear that with the right approach and a bit of patience, anyone can achieve a successful chilli crop, even in the less-than-ideal UK climate.

Whether you’re a seasoned grower or a newcomer to the world of chillies, there’s always something new to discover and apply to your gardening practice. By following the tips and techniques outlined in this guide, you’re well on your way to a bountiful chilli harvest.

Don’t forget to take advantage of resources like the SeedsIO platform to track your progress and share your experiences with a community of like-minded enthusiasts. And, of course, keep experimenting with different methods and varieties to find what works best for you and your garden.

Once your seeds have germinated – check out my article on mastering chilli seedling care.

Happy growing, and here’s to a season filled with abundant, healthy chilli plants!

• When do I remove my propagator lid?
• How do I water my chilli pepper seedlings?
• When do my seedlings need light?

So this video (and transcript below) is for all the new chilli growers out there.

Introduction to Chilli Seedling Care

Once your chilli seedlings have emerged from the soil, you guys have a ton of questions for me. I’m going to try and answer as many of them as I can.

When Should I Remove the Propagator Lid?

One of the most common questions I get is when to remove your propagator lid. The quick answer is as soon as possible after germination.

The long answer, unfortunately, we have many seeds, and they may germinate at different times depending on the type of seed, the plant variety, and the species. It could be a lot of different factors.

Understanding Plant Transpiration and Humidity

Plants typically breathe through their leaves, on the underside of the leaves, through pores called stomata. Now, if it’s too humid, it’s not able to do that effectively.

Another important thing to consider is the way that plants process water and nutrients. Each little plant, has developed a root system below the soil, and that root system is pulling in water as well as nutrients.

Then, the water is transpired through the leaves. If it wasn’t able to transpire that water, it’s going to stop pulling up as much water and therefore stop pulling up as much nutrients, which means you’re going to stunt the growth of your plants.

Now what happens when you’re in a humid environment it makes it very difficult for these plants to transpire effectively. There are two ways to fix this:

• firstly take off the propagator lid,
• secondly, use fans.

Now the fans will help strengthen these plants by moving them around, encouraging the stem to harden a little bit better, but more importantly, it will move the air around so there’s no stagnant stale air and these plants can not only transpire more effectively but they can also breathe more effectively.

You can open up vents on the propagator lids but they’re not very effective unless you can get some sort of airflow in there.

If you have vents on the side as well, you can create somewhat of an airflow in there if you can direct a fan in there or you can create some sort of convection current once a few of your plants have their first true leaves fully established. Then you’ve got probably a week maybe 10 days before you need to consider removing the lid.

What’s the Most Effective Watering Technique for Seedlings?

If you watch any of my beginner guides or most of my videos, I tell you to bottom water. The reason I bottom water my chillies is that when you top water you encourage algae growth. Whilst it’s not great for your chillies, it will go away after a while.

There are a couple of ways you could go about bottom watering. Either pour water directly into a tray and flood it to about halfway, then take out the seed tray and empty out the excess water after about 5 minutes because you don’t want it sitting in water. These roots need to breathe as well. Or, you can take a second tray, fill it to about half the depth of your seed tray – so that you can dip your seed tray without it overflowing.

The Importance of Water Temperature and Soil Preparation

Something else I wanted to point out, you want to make sure that this water is at the same temperature at least as your seedlings, and that’s because you don’t want to shock them. The same thing goes for soil when you’re potting up; you want to get that soil to the same temperature as the plants that you’re transplanting.

Think about this in terms of adding a goldfish to a new pond. You would make sure that the water that the goldfish is in inside the little bag is going to be the same temperature as the pond that you’re adding it into.

I’ve got my water bath set at 20° C, which is the same as my grow room. I have a little temperature probe in the water and that keeps this water at that temperature. I don’t leave it on all the time, I just switch it on a couple of hours before I know I’m going to be watering my plants so it doesn’t waste electricity. If you don’t have a spare heated propagator, you can just use a plain old tray with a heat mat underneath, and you can maintain the temperature that way.

Knowing When to Water Seedlings

Now I know that this tray is ready for water because it is very light. When you add it to the tray with water and it floats a little, it needs water! Stick your tray in the water for about 5 minutes. It will absorb all the water it needs, you can then take it out and put it back inside the original tray.

Whichever seedling containers you use, make sure that water can flow out and it doesn’t get blocked. If the water can’t escape, you’re going to end up having a cell that is just stacked with water.

Do my Chilli Seedlings need Artificial Light?

The third most common question I get is about lighting and more specifically when to turn it on. Chilli seeds do not need darkness to germinate, so you could effectively put your grow lights over them from the second you plant them. However, that’s just going to be a waste of electricity.

Chilli seeds, even the fastest ones, are going to take at least five days to start germinating, so on day five stick your light on. At the very least as soon as you see a little loop (chilli seedling stem) appearing, get your lights over your plants. If you’re using a sunny window sill, make sure that they’re exposed to the sunlight.

BONUS TIP: Feeding Your Chilli Seedlings: Do’s and Don’ts

A very important question is when do I start feeding my seedlings? The short answer is, don’t feed your seedlings. You do not need to for at least the first month. There should be plenty of nutrients inside your soil so that those plants can grow and spread their roots. After the first month, you’re going to be potting it up into fresh soil and a bigger pot.

If you do feed your seedling, which I know is very tempting, you might stunt its growth somewhat. If you are feeding your seedling, especially if you’re feeding it from the top there’s no reason for that root ball to spread any further. By not feeding it, that root system will look for more nutrients and it will spread, spread, spread. Then, by the time you do pot it up, you should have a very compact root ball that is well-established. When you pot up, follow the same practice for the first month to six weeks, depending on the pot size you’re going to, as the soil will have more than enough nutrients in there for that plant to do its thing.

Conclusion and Further Resources

I hope this answers some of your questions. If you have any other questions for me, let me know in the comments below.

There are some great articles to help you get started here: Chilli Pepper Growing

6 Stages of Growing Chilli Peppers for Beginners

Planting Super Hot Chilli Pepper Seeds: A Comprehensive Guide To Successful Germination And Growth

Germinate Chilli Pepper Seeds Like a Pro!

Everything you Need to Know about Light for your Chilli Pepper Plants

If you are still looking for chilli seeds, I have plenty available at chillichumpseeds.com. And, I hope that your season has got up to a fantastic start.

Did you know that creating a homemade soil mix tailored specifically for chilli peppers can lead to healthier plants and more bountiful harvests? It’s a game-changer and could be just what you need.

Using the right soil for growing peppers is crucial for the successful growth of your plants. Homemade soil mixes provide numerous benefits, including better nutrient absorption, improved water retention, and aeration for healthy root development.

Key ingredients such as peat moss, compost, perlite, and vermiculite help create an ideal growing environment when growing these plants.

Your path to vibrant plant life is paved with potting mix insights – so let’s get dirty! 

Three Benefits of Homemade Potting Soil Mix for Peppers

Control: Mixing your own soil puts you firmly in control, as you decide exactly what goes into it. This means your chilli plants get the exact nutrients they need for strong growth.

Protect plant roots: With a homemade mix, you can avoid problems like soil compaction that can harm plant roots. Plus, you can tweak things until you find the perfect balance of good drainage and moisture retention.

Manage pH levels: Using ingredients like compost, chicken manure, and worm castings ensures that pepper plants have all the nourishment they require from seedling right through to the fruiting stage. Mixing your soil also helps maintain an ideal pH level for hot peppers to thrive. Not only does this support healthy growth, but it also aids in preventing issues such as blossom end rot which is common when nutrient levels aren’t just right. Check out this article for more information: The Best Soil pH for Growing Chili Peppers. And I recommend this pH meter if you want to get really accurate measurements.

Tried & Tested Soil Mix for Growing Chilli Peppers

When it comes to homemade soil mixes for chilli peppers, there are several recipes you can try to help you achieve optimal growing conditions. From basic container potting mix recipes to more specialized options like peat-based or soil-based blends, choosing the right recipe at the right time can make a significant difference in the health and yield of your plants. For instance, most compost will have sufficient nutrients for the best chilli seed germination rates and you should only need to add nutrients and fertilizers to your soil when your seedlings are 6 weeks old.

Each recipe offers unique benefits and is tailored to different types of plants, so exploring these options will help you find the best fit for your gardening needs. Having tried all of these mixes over the years I’ve found a recipe that works for me, every time. Today, I’ll share my recipe with you to save you some time!

ChilliChump Chilli Pepper Potting Soil Recipe

Preparing your new soil mix is a crucial step when you’re ready to transplant your pepper seedlings. This recipe will help you to focus on getting the optimal yields from your chilli plants this season.

Chilli peppers like to have a soil that drains really well. Their roots don’t like a lot of water, they like to dry out in between waterings which is why a high-quality, loamy compost is essential. Try to avoid things like coco coir as it has water-retaining properties.

• 10 parts PLAIN compost *
• 1 part Perlite
• 1 part Vermiculite
• 1 part Vermicompost (or chicken manure)
• 0.25-0.5 parts Fish, Blood, and Bone
• 0.1 part Epsom Salts
• 0.05 part Mycorrhizal Fungi (optional)

* _{Make your own compost if you have the space, otherwise if you need to buy it, make sure that it doesn’t include any fertiliser enrichment and most definitely no “moisture retention” additives.}

1 part could be a bucket, spade, scoop, or even a spoon, depending on how many plants you have to transplant.

I’ve spent ten years perfecting this soil mix to optimize my chilli pepper harvests. Regardless of the variety of pepper you’ve chosen to grow (I like to grow a mix of sweet peppers, hot peppers and super hot peppers for sauces), this potting mix will serve you well for many different varieties, producing great plants and big yields.

Peat-Based Potting Soil Mix Recipe

I have experimented with pure peat moss and a peat moss and compost mix in the past but when you compare it to the potting soil mix detailed above, whilst the seeds germinated quickly the seedlings showed poor growth and many seedlings died very early on.

Whilst the mix of peat moss and compost performed slightly better than the pure peat moss it was nowhere near as successful as hydroponics and my ChilliChump potting soil recipe. And, using peat moss is not great for the environment either so it’s not something I will use when growing chillies or other vegetables ever again.

Watch the full video here: Clear Results! Seedling Soil Experiment

Potting Soil Mix for Chilli Pepper Plants – Conclusion

In conclusion, the right potting soil mix is essential to successfully growing chilli peppers. A good soil mix offers several benefits, including precise nutrient control, root protection, and pH level management, all of which contribute to healthier and more productive plants.

Whilst I’ve given you my recipe, I would encourage you to experiment with your potting soil mix, as it allows you to tailor the mix to your specific gardening needs and your growing environment.

The well-balanced ChilliChump potting mix, which has been perfected over a decade of chilli pepper growing, ensures optimal drainage and moisture retention, making it an ideal choice for various pepper varieties, from sweet to hot. It outperforms peat-based mixes and offers a practical solution for achieving robust chilli plants and abundant yields.

So, whether you’ve been growing chillies for years or you’re just starting, investing in the right potting soil mix can make all the difference in your gardening success. Happy growing, and please share your experiences in the comments, we love to hear from the community.

If you are new to growing chillies, this article may help you to get started: 6 Stages of Growing Chilli Peppers for Beginners.

Potting Soil Mix FAQs

What’s the best soil for growing chilli peppers from seed?

Chillies need good-quality compost for successful germination. Chilli peppers grow best in loose soil. Loose soil lets the roots spread out and reach nutrients easily. If your soil has any debris in it, you may want to put it through a riddle or compost sieve to ensure your soil is fine and fluffy. 

Why should I add fish, blood and bone meal to my chilli pepper potting soil?

Adding bone meal provides essential calcium and phosphorus which helps root development in chilli peppers. Strong root growth in the early stages of your chilli plants life is very important for later success!

What’s special about using vermicompost or earthworm castings in my soil mixture?

Earthworm castings enrich your homemade blend with microorganisms and nutrients that support the health of your plants—it’s like giving your plants an extra boost to grow stronger and healthier! I am a huge fan of vermicompost for supporting the growth of my chilli plants – check out my compost playlist for more benefits and experiments. 

Does the type of container affect how I should prepare my pepper’s potting mix?

Yes, the type of container can affect how you should prepare your chilli pepper’s potting mix. If you are using a container without good drainage, you may need to adjust the potting mix to ensure it doesn’t become waterlogged…adding more perlite will help with this. Additionally, the size of the container can also impact the type of potting mix you use to provide adequate support and nutrients for your pepper plants. A trick I use for larger pots is to use a higher percentage of vermiculate and perlite for the bottom half of a large pot.