C99 and powdery mildew

[SKAGITMAGIC]

Out of 10 or so strains only the c99 and a little,little spot on the chemdawg. I switched to potassium bicarbonate, very cheap foliar application, teaspoon in a quart sprayer. 7 bucks, its the greencure stuff, the dunks are comeing pre, grated and thre're cheaper!!!

 

[Mutt]

I noticed the same thing on my cindies i grew outdoors. PM loved it, didn't have trouble with any other strain just cindy. Hope you get it under control.