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Botrytis (Grey Mould) in Dahlia

How to identify and treat botrytis (grey mould) in Dahlia.

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Dahlia care requirements

water
Regularly and deeply — keep evenly moist.
soil
Rich, well-draining soil.
light
Full sun.
symptoms

Symptoms to look for in Dahlia

  • fiber_manual_recordGrey fuzzy mould on leaves, flowers, or fruit
  • fiber_manual_recordBrown rotting tissue
  • fiber_manual_recordCollapsed flowers
help

Common causes in Dahlia

Caused by Botrytis cinerea. Thrives in cool, humid conditions with poor air circulation.

healing

How to treat botrytis (grey mould) in Dahlia

Remove all affected tissue. Improve air flow. Apply fungicide.

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Preventing botrytis (grey mould) in Dahlia

Good air circulation. Remove dead plant material promptly. Avoid overhead watering.