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How do you treat powdery mildew on plants?
I need some help figuring out what treatment to buy to rid my New Zealand Flax plants of a powdery white substance growing at the base of the leaves. I tried Garden Safe Fungicide 3 but it did not appear to do anything after 2 weeks’ application. I see there are many different products offered on your site but I’d like to get some expert advice before choosing one. I can email photos.
San Francisco, CA
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