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Oct 24, 2010 9:00 AM CST
|What's your favourite prevention for powdery mildew. I had someone suggest potassium silicate for roses. Here's some info on a product that is available and was wondering if anyone has tried it.
Oct 24, 2010 4:46 PM CST
|Never tried that. I use GreenCure. It works well, but might have to be applied every week or two if PM returns.
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