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Last year my garden was hit hard by powdery mildew. So this year I was more careful about spacing and I've been careful about watering, too. (Trying to make sure I'm only watering the soil, not the leaves, and not watering at night when the leaves that do get wet would stay damp a lot longer.) So far, so good. But then yesterday I found a couple of tell-tale white spots on one of my zucchini leaves. I made sure to remove it.
I've read that a mixture of baking soda & water or a mixture of milk & water can combat powdery mildew...do you know if it would help prevent it, too? How often should I apply it? If I find more spots in the next few days, I'll think I'll need to start spraying.
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