Flower drop probable causes:
1. Day temp too high >95F - no
2. Night temp too low <65F - maybe
3. Too much nitrogen fertilizer - no fert
4. Too much water - no sign for that
5. Low light levels (reduces fertility).- sure no
6. Very low humidity (reduces fertility) - maybe but cant control it
7. Poor air circulation (air circulation contributes to pollination). sure no
8. Lack of pollinating insects. there are many
9. Size of pot - i guess no
10. Too much mineral in feedwater. sure no (filtered water)
11. Too much grower attention/anxiety. not at all
so i will wait until it will get above 65 at night (1-2 weeks)