While the most effective treatment against powdery mildew is fungicide, if you want to go for a gentler option, then two ...
To treat peonies with powdery mildew, mix 1 tablespoon each of baking soda, liquid dish soap, and horticultural oil to 1 ...
When it comes to one of the country’s most popular perennial plants, the “big four” vexations are powdery mildew, black spot, rust and aphids, according to Jay Pscheidt, a plant pathology ...