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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Deciduous Trees > Ash > Ash flower galls

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Ash > Flowers > Ash flower galls

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Ash flower galls

  • Galls first form in April or May and remain on trees during summer and through winter
  • Galls are broccoli-like and green during summer and dark brown or black during winter
  • The galls are distorted clumps of male flowers
  • Produced by tiny eriophyid mites
  • More information on Ash flower galls

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