I got powdery mildew on one of my rooms and I washed it off with alkaline water ph of 9.6 it worked very nicely. But it comes back within a couple days . Anyone no a natural way or try spraying potassium silicate late in flower for powdery mildew
does anyone think if u use a powerful STS solution 1:4 ratio then a week later spray that plant with preventive bug spray could the STS wash off the leaves and drip onto the plant beside it cause it to reverse as well .