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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Petunia > Malformed flowers

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Petunia > Flowers > Malformed flowers

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  • Petunia aster yellows 1
  • Petunia aster yellows 2
  • Petunia aster yellows 3

Aster Yellows

  • Leaves are small and yellow on a few to all stems
  • Flowers are small pale green to white and underdeveloped
  • Clumps of weak shoots known as witches broom develop throughout the plant
  • Infected plants are often stunted
  • Often one to a few random plants within a flower bed are infected while others remain healthy
  • More information on Aster Yellows

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