white mold on peonies - Knowledgebase Question

metuchen, Ne
Question by plazacarolyn
August 23, 2009
should I cut them back to the ground? What about flowering next year? any preventive measures?

Answer from NGA
August 23, 2009


Once a peony is fully involved in the fungal disease powdery mildew it's best to cut the entire plant back. Prune it down to ground level. Your peony should be healthy when it resprouts next spring. Powdery mildew attacks plants that are under strees, either from water issues, too much shade, or over crowding. It attacks plants in the late summer when days are warm and nights are cool. Some years are worse than others so with any luck your peonies will remain healthy next summer. Hope so!

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