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Home › Forums › Organic-Gardening Questions › Pests and Diseases › powdery mildew › Re: powdery mildew
It is too late to try this year, but if you can spray the leaves with baking soda BEFORE the powdery mildew usually appears, than it will change the pH of the leaf surface, preventing the powdery mildew from growing there. You would need to reapply after rain and watering. As far as I know, the baking soda won’t make a difference, if you can already see white.
Welcome! I’m Margaret Roach, a leading garden writer for 25 years—at ‘Martha Stewart Living,’ ‘Newsday,’ and in three books. I host a public-radio podcast; I also lecture, plus hold tours at my 2.3-acre Hudson Valley (NY) Zone 5B garden, and always say no to chemicals and yes to great plants.
