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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous > Hydrangea > Buds and petals discolored

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Hydrangea > Flowers > Buds and petals discolored

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Botrytis mold (gray mold)
Botrytis cinerea

  • Flower buds, petals, or entire blossoms turn tan to gray
  • Flowers become covered with fuzzy gray colored fungal spores in wet weather
  • Brown, round to irregular spots on leaves, often where petals have fallen
  • Common during cool wet weather
  • More information on botrytis mold
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Colletotrichum gleosporoides

  • Slightly sunken brown spots on leaves
  • As spots grow, dark brown rings give the spot a 'bull's eye' appearance
  • Spots can grow to 1 inch in diameter
  • Spots can be found on both leaves and flower petals
  • More information on anthracnose

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