Powdery mildew affects my peonies every year. Fortunately, it has not spread to nearby plantings and it doesn't occur until about a month after bloom. But that ruins the foliage of the peony plant, of course, which is otherwise lovely even without blooms. I use a neem oil spray every couple days and in between, just spray down the entire plant with a moderate pressure shower. This helps to at least reduce the unsightly blight but getting rid of it entirely, let's be honest, probably impossible for anyone. I'm just glad it doesn't affect anything else. Small gifts...
Powdery mildew affects my peonies every year. Fortunately, it has not spread to nearby plantings and it doesn't occur until about a month after bloom. But that ruins the foliage of the peony plant, of course, which is otherwise lovely even without blooms. I use a neem oil spray every couple days and in between, just spray down the entire plant with a moderate pressure shower. This helps to at least reduce the unsightly blight but getting rid of it entirely, let's be honest, probably impossible for anyone. I'm just glad it doesn't affect anything else. Small gifts...