Advice
RHS Help & Advice
Grey mould on indoor cyclamen
Symptoms
A
grey fluffy mould develops on petals, leaves and leaf stalks,
especially round the base of the leaf stalks. The other common
symptom is spots on petals that develop from small water-soaked
lesions into necrotic spots.
Cause
Grey mould or botrytis, caused by the fungus Botrytis cinerea, can be a troublesome disease of florists' cyclamen. It is more severe in humid conditions and wounded tissues are more susceptible to attack.
Non-chemical control
Keep pots of cyclamen in airy, well-ventilated places and remove any affected parts as soon as seen.
Chemical control
No chemical control measures are available to amateur gardeners.