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When to plant
chillies in the UK
Need heat to germinate — use a propagator or the warmest windowsill you've got. The more sun they get, the hotter the fruit.
Work out your own dates
Starts from the recommended sow date for your area. Sowed on a different day, or planted out late? Adjust below and the harvest moves with it.
Using the UK-average last frost · 15 April · add your postcode to tune it
Growing journey
24 weeks from planting out to harvest · Start indoors 13 weeks before planting out
Get chillies seeds
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What chillies need
Full sun. Warmth. Sheltered or under cover. Perfect for a sunny patio in pots.
Spacing
40cm between plants
These are larger plants — give them plenty of space for air circulation.
Varieties worth growing
Jalapeno
commonThe world's most useful chilli. Warm enough to add bite, mild enough not to hospitalise anyone. Thick-walled and perfect for stuffing, slicing, and pickling. Grows well on a sunny UK windowsill and makes you feel like you're getting away with something.
Pickled jalapenos
Slice into rings, pack into jars with garlic and peppercorns, cover with hot vinegar brine. Ready in a day, perfect in a week. You'll put them on everything.
Jalapeno poppers
Halve, stuff with cream cheese, wrap in bacon, bake until crispy. The heat, the cream, the salt, the crunch. Dangerously good.
Ring of Fire
uncommonA cayenne type that dries brilliantly — string them up in the kitchen and you've got a year's worth of chilli flakes and an instant rustic aesthetic. Productive, hot without being hostile, and genuinely easy to grow.
Homemade chilli flakes
String the ripe red chillies on thread, hang in a warm, dry place until completely dried. Crush in a mortar. Your own chilli flakes, infinitely better than the jar, and they'll last all year.
Scotch Bonnet
rareFiercely hot and distinctly fruity — the chilli behind jerk chicken and Caribbean pepper sauce. Needs warmth to ripen in the UK (a greenhouse or sunny windowsill), but if you get it right, a single plant produces enough to heat-proof your cooking for months.
Caribbean pepper sauce
Blitz ripe scotch bonnets with mango, garlic, mustard, vinegar, and a pinch of allspice. Fruity, fiery, and a few drops transform rice and peas, grilled chicken, or a morning egg. Wear gloves.
Hungarian Hot Wax
commonStarts yellow, ripens through orange to red, and the heat is moderate — enough to warm but not to punish. The waxy flesh is thick and perfect for stuffing. An excellent first chilli for cautious growers who don't want to play roulette with their dinner.
Stuffed hot wax peppers
Halve lengthways, stuff with a mixture of cream cheese, herbs, and a little garlic. Grill until the cheese melts and the pepper softens. Mild enough to eat like a snack, warm enough to know it's a chilli.
Chilliesdrink heavily through summer — a good soak at the roots beats a daily sprinkle. How I water, and the lance I use →
When to sow chillies
Based on UK average frost date. Enter your postcode for exact dates, or find your city.
Where to buy chillies seeds
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What you'll need for chillies
The stuff beginners wish they'd bought sooner.
These crops need 24-30°C to germinate — a cold windowsill won't cut it. The difference between success and failure in the UK.
More in our equipment guide →High-potash liquid feed. Once the first fruits form, feed weekly — it makes a real difference to yield.
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Get your exact dates
Enter your postcode for personalised planting dates for chillies.