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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Peony > Black or brown

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Peony > Flowers > Black or brown

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Gray Mold
Botrytis paeoniae

  • Flower buds turn black to brown and fail to open
  • New shoots turn black, wilt and die when they emerge in the spring
  • Stem infections turn brown or black and often have a target spot appearance
  • Leaves and petals have black to brown irregular spots, and may turn completely black
  • All infected plant parts produce fluffy gray spores with moisture
  • Most common in cool, wet weather
  • More information on Gray Mold

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