I have dusty white mold on the lower leaves of my peonies. and it is showing up on most all of my peonies, regardless of where they are planted - behind the garage, in the front yard and several feet away in a side yard garden. What can I do to get rid of it?

Hi,

You probably have powdery mildew a fungal leaf disease. This is common on peony and the best way to deal with it is to protect new leaves from getting it. Once it is there not much to do but remove affected foliage and try to limit it overwintering in the debris around the plant. As far a fungicides us any general purpose fungicide such as daconil, funginex or similar applying to new leaves before they are infected and repeating every two weeks or so.