How to Get Rid of Powdery Mildew During Flowering ...
Jun 03, 2020·Powdery mildew first shows up on plants as a white or gray powder. The powder is a by-product of the fungal spores and usually appears on the cannabis leaves, as well as other areas like the colas, where the flowers bloom. Powdery mildew spores are airborne, meaning they spread through the air from one plant to another.