How to Grow Habanero, Scotch Bonnet & Superhot Chillies (Capsicum chinense) from Seed

September 16, 2026

Ripe Capsicum chinense chillies on the plant

Bishy Barnabee's Growing Guides

How to Grow Habanero, Scotch Bonnet & Superhot Chillies from Seed

A complete UK guide to Capsicum chinense, the species behind habaneros, Scotch bonnets, nagas, scorpions and the Carolina Reaper. One method covers them all, from mild Biquinho to the hottest chillies in the world.

Almost every famously hot chilli belongs to one species: Capsicum chinense. Habaneros, Scotch bonnets, Bhut Jolokia, the Trinidad scorpions, the 7 Pots and the Carolina Reaper are all chinense, and so, perhaps surprisingly, is the mild Brazilian Biquinho.

What they share matters more to the grower than how hot they are. They all germinate slowly, need more warmth than other chillies, and take a long season to ripen. Grow one well and you can grow them all. In Britain that means an early start, a heated propagator and a greenhouse, polytunnel or very sunny conservatory.

Quick Facts at a Glance

Species

Capsicum chinense

Sowing Time

January to March, heated propagator

Germination

1 to 4 weeks at 26 to 30°C

Harvest

August to November

Best Grown

Greenhouse or polytunnel

Difficulty

4 out of 5, needs warmth and time

Understanding the Species

Despite the name, chinense has nothing to do with China. It comes from the Amazon basin and spread through the Caribbean long before Europeans arrived. An 18th-century botanist named it on the mistaken belief that it had come from China, and the name stuck.

How to recognise it

Leaves are broad, glossy and often noticeably crinkled. Flowers are small and white or greenish-white with no spots, and usually appear two to five together at each leaf joint rather than singly. The ripe fruit has a distinctive fruity, floral aroma that you can often smell before you taste it.

Heat is a variety trait, not a species rule

Within chinense, heat ranges from almost none to well over a million Scoville units. That makes no difference to how you grow them. A Biquinho and a Carolina Reaper want the same temperatures, the same pots and the same long season. The difference is how carefully you handle the fruit.

Handling superhots

Wear disposable gloves when picking, cutting or deseeding superhot chillies, and keep your hands away from your eyes and face. Capsaicin oil stays on skin for hours and is not washed off by water alone.

Wear eye protection when cutting or blending the hottest varieties, work in a ventilated room, and keep fruit, seed and plants out of reach of children and pets.

Our chinense varieties

When & How to Sow

Sow in January or February. Chinense needs a long season, and a March sowing often runs out of summer before the fruit colours. With grow lights you can start the hottest varieties in December.

Warmth is everything

Seed that sits in cool compost may never germinate, or rots before it does. A heated propagator holding 26 to 30°C makes more difference than anything else you do at this stage.

Sow shallow and warm. Sow seed 5mm deep in moist, fine seed compost, in small pots or modules. Place in a heated propagator at 26 to 30°C.
Be patient. Most seed germinates in one to four weeks, but some superhots take six. Keep the compost moist but never wet, and don't give up on a pot too soon.
Give maximum light. Once seedlings appear, move them into strong light straight away. January light is weak, so use a grow light or your brightest windowsill, or seedlings will stretch and flop.
Keep them warm. Move seedlings out of the propagator gradually and keep them at 20 to 25°C by day and no lower than 15°C at night.

Growing On Tips

Pot on in stages rather than straight into a large pot. Move seedlings into 9cm pots once they have two or three true leaves, then into 2 to 3 litre pots as roots fill them, and finally into 10 to 20 litre pots, a greenhouse bed or a large growbag in May or June.

🌡️

Warm nights

Keep plants under cover until nights stay above 12°C. Cold checks growth for weeks.

🏠

Under glass

A greenhouse, polytunnel or sunny conservatory gives the heat and season length chinense needs in Britain.

💧

Water carefully

Let the top of the compost dry slightly between waterings. Constantly wet roots cause more losses than drought.

🍅

High-potash feed

Once flowers appear, feed weekly with a tomato feed to support flowering and fruit.

🖌️

Help pollination

Under glass, tap open flowers or brush them with a soft paintbrush every few days.

🪵

Stake

Heavily laden branches snap. Support tall plants with canes.

Overwintering

Chillies are perennials. In October, bring a healthy plant into a bright, frost-free room at 10 to 15°C, cut it back by about two-thirds and water sparingly until spring. An overwintered chinense crops much earlier the following year.

Common Problems & How to Fix Them

Problem	Likely Cause	What to Do
Seed won't germinate	Too cool, or compost too wet	Use a heated propagator at 26 to 30°C and keep compost just moist. Allow up to six weeks.
Tall, weak seedlings	Not enough light	Use a grow light or brightest windowsill, and keep lights close.
Flowers drop off	Temperatures too hot or too cold, or dry compost	Ventilate and damp down in heatwaves, keep nights warm and water evenly.
Fruit still green in October	Sown too late or season too short	Sow in January or February. Bring plants indoors to finish ripening.
Sticky leaves, curled tips	Aphids	Squash or rinse off early colonies and encourage predators.
Fine mottling, webbing	Red spider mite in hot, dry glass	Damp down paths and mist leaves regularly.

When to Harvest

Chinense fruit takes longer to colour than other species, often ten weeks or more from flowering. Pick when fully coloured for the best flavour and full heat. Green fruit can be used, but the fruity aroma develops as it ripens.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
🌱 Sow, heated
🪴 Final pots
🌶️ Harvest

Sow in heated propagator (Jan to Mar)

Final pots or greenhouse bed (May to Jun)

Harvest (Aug to Nov)

Start in January. The single most common reason for a poor chinense crop in Britain is sowing too late. Each week gained in winter shows up as ripe fruit in autumn.