canadian1969
Well-Known Member
Higher heat = lower RH, as you drop your temps, RH goes up. Drop them too low and you're fighting potentially negative RH levels and chasing environment issues.
Just observationally, in my grow when temps rise so does humidity. We just had a big negative temp swing here in Ontario to colder air and the tent went from 26 C 58% to 22 C 45%. I know there is a bit of a myth around warm air holding more moisture, dew point etc. But honestly I have never seen my temps go down and humidity up. Of course it could be my particular environment. dunno, just saying.