o you have powdery mildew on your medical marijuana? Yikes! Powdery mildew in the grow room? That’s nothing to play with. It can spread very quickly and attack all of your plants. Powdery mildew prevents the plants from growing by messing with their photosynthesis. Also, its hazardous to people as well.
1. Remove leaves that are completely covered in it.
3. Pour in a spray bottle and spray it all over the top and bottom of each leaf. As it dries, it removes the powdery mildew.
Another very important tip : Clean up the room and keep it clean.