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My Peonies are covered with a white mildew and some of them have a blight causing the foilage to turn dark. What should I do for them? Do I cut off the foilage? Will it affect next year’s growth and bloom?

Once the foliage starts to yellow, cut it off and remove it from the yard in a garbage bag.  The best way to control powdery Mildew is with preventative sprayings with copper of sulfur fungicide before the symptoms show…around mid-May through mid-June.  It is difficult to control once the white powdery coating on the leaves shows up.   None of the should create problems for next year’s flowering cycle.

 

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