Neem oil or gardenSafe 'fungicide 3' (it's neem oil in disguise).
Light mist. Dry. Light mist again. Dry. Repeat until you notice that the leaves are just SLIGHTLY glossier than before.
I've never seen that type of mold on a cannabis plant but neem is an EXCELLENT fungicide and prophylactic against re-infection.
stinkyattic Reviewed by stinkyattic on . mould on leaves i think new grower Hi zoneheads. Got powdery white stuff on my crop. am short on cash for grow closet. light is expensive to run. So i put plants in conservetory on a natural light cycle. i know its too cold for them but nothing i can do at the minute. Have uploaded some pics. Any help would be great. would like to know what it is and how to prevent in the future. thanks guys. Rating: 5