Arrgh! Powdery mildew on a new peony!
This is a new problem for me. I planted 14 peonies from Klehm's last year. They did great, all but two bloomed. They are in a semi-shady bed and we have had tons of rain. Well I walked out the other day and one plant (the most expensive one, of course, Carl Klehm, a real beauty) was FULL of powdery mildew. Powdery, whitish-gray-- can't be anything else (or could it?) Blasted it with fungicide--- should I continue this, or should I just cut the whole thing back? The whole plant is affected, practically.