I_T_C_R_W___GROW

in nature it can get 80-90 % in the night, (have the same problem with 22°/85% in the night - but 27-29° + fans dry the chamber during the day down to 55%. i have read that a small heater fan in the night in front of the chamber could help - which i will try next. ). Your plants look fine. Nothing to worry.

Great. You started a diary. Now just add the temp and then you and we know if your plant is in the optimal climate oder if something is over or under (to much or not enough transpiration possible - which is a root of a lot of problems.

very nice to see a result of this idea before finishing my Auto nice work

This diary was an inspiration for me, thanks.

20°C + 78% Feuchte ???