Relative humidity

[gbauto]

Make certain that your exhaust is running continuously-that's a pretty big spike during lights out.

[DW2]

Howdy PAPA, The humidity, in my grow room, goes up at night as well. I run the exhaust fan and the circulation fans 24/7. I live in a semiarid climate (15% to 35% normally), but the grow room can get up to 55% to 60% when the ambient humidity rises outside. Keeping the fans running full time I have not had any bud rot or mold problems, so far.
Good luck with your growing.

[Locrian99]

Do you have your exhaust running during lights out? That’s a pretty big variance and as your buds fatten up 65-70 is pretty high. Your lights on rh is pretty spot on.

[PAPA]

Hi everyone,
Third week of flowerring.
Relative humidity during dark hours 65-70%.
During lighting hours 35-45%.
Sounds right??!
Thank you.
Papa.