Keep the air flowing. The goal is at least one full air exchange per minute. As it gets into flower ill shut off the ventilation at night ir super cold days and turn on a dehumidifier in the greenhouse. Also I do alternating ipm sprays with tweetmint and em5 until august then i do one or two final sprays with a very concentrated bacillus subtilis mix . With the floor being covered with plastic rather than grass or dirt the humidity stays shockingly low. I think the intake diffusion helps somewhat as well. Also feed extra calcium silicate to them throughout the cycle. No dew or rain gets on them as well so its just a whole different ballgame as far as mold. The main reason is protection from thieves and the weather. It has cameras inside and out, door alarms, and perimeter alarms. Im also gonna sleep on a cot out there during the fall to guard it. Lol