Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Roses > Spots on flowers
Roses > Flowers > Spots on flowers
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Gray Mold
Botrytis cinerea
- Small red rings or flecks on white or light colored petals
- Brown irregular spots on petals
- Completely brown, curled over, dead flower buds
- Brown sunken area on stem
- Gray fuzzy spores produced in cool wet weather
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Thrips
- Active throughout summer
- Causes brown streaks, esp. in light colored blossoms
- Heavily infested buds may not open
- Very small