Thai Dragon
Capsicum annuum — 50,000–100,000 SHU
Thai Dragon is a vigorous, ornamental Annuum variety producing dozens of upright, thin-walled red fruits that point skyward as they ripen. Originally bred for Southeast Asian cuisine, it produces the classic bright, piercing heat used in Thai stir-fries and curries. Very productive and easy to grow, with striking red fruits against dark green foliage.
🔥 Heat Scale
🌱 How to Grow Thai Dragon
Full sun, 6–8 hours minimum. Thai Dragon is a vigorous variety that performs best with maximum sun exposure, which also enhances colour development in ripening fruits.
Thrives at 22–30°C — reflecting its Southeast Asian origins. More heat-tolerant than European sweet peppers. Grow under cover in temperate climates for best results.
Moderate watering — allow the soil to dry slightly between waterings once established. Thai Dragon is more drought-tolerant than large-fruited varieties.
12–15 L container is ideal. Thai Dragon grows to a medium-sized bushy plant that produces heavily with sufficient root space.
A light feeder compared to superhot varieties. Weekly tomato feed from first flower is sufficient. Heavy feeding produces lush growth at the expense of fruit.
Keep in a visible spot — the densely packed upright red fruits against dark green foliage are striking. One of the most ornamental productive peppers you can grow.
🩺 Common Problems
Cause: Cool temperatures or insufficient sunlight slow the ripening process in Thai Dragon, which requires warmth to colour up fully.
Fix: Maximise heat and sun exposure. Move containers to the warmest spot available. A cloche or polytunnel significantly speeds ripening.
Cause: High fruit set — a sign of a productive plant — can weigh down individual branches, especially when fruits are clustered.
Fix: Stake main stems or use a tomato cage. A sign of a very successful plant, not a problem to worry about.
Cause: Hot, dry indoor or greenhouse conditions are ideal for spider mite populations. Look for stippled leaves and fine webbing.
Fix: Increase humidity around plants, spray with neem oil solution, and introduce predatory mites in serious infestations.
Cause: Soil temperature below 20°C significantly inhibits germination. Thai Dragon's wild-adjacent genetics prefer warm germination conditions.
Fix: Use a heat mat to maintain 25–30°C soil temperature. Germination typically takes 10–21 days at optimal temperature.
❓ Common Questions
How hot is Thai Dragon vs bird's eye chilli?
Both measure 50,000–100,000 SHU, but Thai Dragon is a Capsicum annuum variety vs bird's eye which is typically chinense — slightly different flavour profile, both very hot.
What is Thai Dragon used for in cooking?
Thai stir-fries, curries, dipping sauces, and dried chilli flakes — wherever intense heat is needed in Southeast Asian cooking.
Is Thai Dragon the same as Thai bird's eye chilli?
A different cultivar. Thai Dragon produces larger, elongated fruits vs the tiny round bird's eye. Both are extremely hot.
How many fruits does a Thai Dragon plant produce?
Dozens per plant — it is a highly productive, prolific variety that continues fruiting throughout the entire season.
