Three weeks old from clones. Water when ever the pot feels light ore dry three inches deep to the soil. I use ocean forest. Just fed half doses of compost tea and some silica, cal mag, recharge, and microbes. All half doses. Just few days ago I spray all my plants with plant therapy due to powdered mildew before sunset and yesterday I found four or five plant showing this problem and can’t figure out what’s wrong with it. Please help. Hope you have answers for me. My first thought was the spray cause the burn but this is was half hour before sunset and I let them sleep for few hours before the light turns on. Thanks for the help.