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