Get some Serenade and spray the plants. Serenade is safe to use up until the day of harvest, but it stinks to high heavens so you wouldn't really want to. Since you are a week or two from harvest, it'll be okay to use it now. Usually one application will kill the powdery mildew.

Not that it makes much difference now, but you should be running your lights at night, when the temps drop and you need the heat.

PC
PharmaCan Reviewed by PharmaCan on . powdery mildew? I believe i have a powdery mildew problem on three of my endless sky plants 7 weeks into flower! what should i do? should i harvest early? At first i thought since the temps were getting down into the high 30's at night that it was just the resin glands reacting to the cold and almost freezing in a way but now after a week and further examination i see that it wipes right of in some spots. I'll upload pics of what it looks like later. Please, Help! Rating: 5