"PM" (powdery mildew) is a huge problem in indoor grows[1]. It's especially bad in the Marijuana industry where it completely ruins the plants' suitability for

"PM" (powdery mildew) is a huge problem in indoor grows[1]. It's especially bad in the Marijuana industry where it completely ruins the plants' suitability for sale (potentially lethal if inhaled/smoked), but it affects many other plants as well. [1] https://en.m.wikipedia.org/wiki/Powdery_mildew https://en.m.wikipedia.org/wiki/Powdery_mildew