"echinosum" wrote after...

Bob Hobden replied
Chillies get hotter if they are well watered during the two weeks before

harvest.
Usual advice is that chillies get hotter if stressed, ie, regularly
allowed to get to looking sad and drooping before watering. (Snip)

That's true too, but after you have stressed them then give them plenty of
water for the last two weeks. I might add that growing them outside in the
UK in the open ground and leaving them to their own devices most of the time
once flowering, as we do with our Thai Dragon, is stressful enough for them
to get rather hot.

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Regards
Bob H
17mls W. of London.UK