I have a peony, Dancing Butterflies, I planted 2 yrs ago. It bloomed this spring and is now covered in a powdery white looking stuff. It is covering almost all the leaves. The other peonies in the garden do not have it. It is planted by itself, nothing around it, so very open. I would like to know if anyone knows what it is, and how to get rid of it and if it just looks bad or will it actually kill my plant?
