In her article (Shari Armstrong) on solutions for powdery mildew, for non-toxic remedies a dilution of hydrogen peroxide and potassium salts, what proportions do you recommend for the peroxide (and water, I assume)? What are potassium salts, how might I acquire it, and how is it used? My particular interest is currently an indoor begonia.
Details on Powdery Mildew Removal
You can avoid all the worry about mixing amounts and where to get certain items. You can buy a product call Green Cure that will do the trick and has all the items already in it, it is an Earth Friendly product and I can personally testify that it works great! Here is a link where it can be purchased: http://www.planetnatural.com/product/green-cure-fungicide/
Tell them Stan The Rose Man sent you. :)
Stan The Rose Man
Gardening Know How