It is indeed a white powder on the leaves. We got rid of it by buying something called Neem. You mix the Neem with water to dilute it, then spray the leaves, both top and bottom, thoroughly in a long and arduous process that I did not partake in. *grin* But it works. The Neem changes the PH level on the leaves to something the powdery mildew doesn't like. And Neem is supposedly completely natural, not a fungicide or anything.
There's also something you can do with baking soda, but we never got that to work. (We tried that first.)
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timeasmymeasure
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Date: 2009-08-20 11:12 pm (UTC)There's also something you can do with baking soda, but we never got that to work. (We tried that first.)