Powdery Mildew Organic Treatment
Powdery mildew organic treatment
You can also use baking soda (bicarbonate of soda) as a safe organic spray. Add one tablespoon of baking soda to one gallon of water. Spray every two or three days. Better than baking soda is potassium bicarbonate, which really knocks out powdery mildew and eliminates it completely.