66 is kind of okay for veg but on the high side. I'm vegging in the high 20s -low 30s. Low humidity in early stages is important to prevent damping-off.
For flower it's super important to get your humidity down to 50% or less.
stinkyattic Reviewed by stinkyattic on . Humidity Question Just got my humidity therm. hooked up, it reads 66 but the problem is it's not right where the canopy of the plants are. I see no signs of fungus at all, but am considering buying a dehumidifer as a precautionary measure. Question is... if my humidity is at 66 a few hours into their "day" what does it get up to at night? Should I be concerned? I also only have one occilating fan going right now, perhaps I should buy another. Some people reccomend using a heater during the night cycle, Rating: 5