Troubleshooting
Chrysanthemum 'Snowdon' problems — and how to fix them
Chrysanthemum 'Snowdon' (Chrysanthemum 'Snowdon') is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Botrytis on white blooms
Brown spotting on petals in damp conditions; plant in full airflow and avoid wetting flowers when watering.
Aphids
Particularly visible against pale stems; knock off with a water jet or treat with insecticidal soap.
Powdery mildew
White powder on foliage mid-season; remove worst-affected leaves and increase spacing.
Earwigs
Damage petals overnight; place inverted pots filled with straw near plants as traps.
Winter crown rot
Caused by wet, poorly drained soil; mulch crowns in autumn and ensure drainage is sharp.
Prevent chrysanthemum 'snowdon' problems before they start
Most chrysanthemum 'snowdon' issues are care-mismatch, not bad luck. Dial in the basics:
Chrysanthemum 'Snowdon' problems — FAQ
Why is my chrysanthemum 'snowdon' botrytis on white blooms?
Brown spotting on petals in damp conditions; plant in full airflow and avoid wetting flowers when watering.
Why is my chrysanthemum 'snowdon' aphids?
Particularly visible against pale stems; knock off with a water jet or treat with insecticidal soap.
Why is my chrysanthemum 'snowdon' powdery mildew?
White powder on foliage mid-season; remove worst-affected leaves and increase spacing.
Why is my chrysanthemum 'snowdon' earwigs?
Damage petals overnight; place inverted pots filled with straw near plants as traps.
Why is my chrysanthemum 'snowdon' winter crown rot?
Caused by wet, poorly drained soil; mulch crowns in autumn and ensure drainage is sharp.