I have a lot of data on RH% and chiles and, from my records, RH% from 20% to 80% has no effect on chile growth.
I grow in hydro in a controlled environment.
Flower drop probable causes:
1. Day temp too high >95F
2. Night temp too low <65F or too high >85F
3. Too much nitrogen fertilizer
4. Too much water
5. Low light levels (reduces fertility).
6. Very low humidity (reduces fertility)
7. Poor air circulation (air circulation contributes to...