Make a box, room something that you can control air air in ,ventilation exhaust out,humidifier, air conditioner remember you control the environment in that room as you can tell its complicated but that's your solution good luck
nampra Reviewed by nampra on . Question about ventaltion and powdery mildew I just moved to and different state and the temps here outside are around 30-35 in the day and 10-15 at night..My room temp range from 58-70.. I dont know what to do about bringing air in from outside due to it being so cold... I am starting to get powdery mildew on plants and my humidity is around 35-45... If there is any info anyone can give me about what todo it would be much appreciated Thanks.... Rating: 5