Troubleshooting
Chrysanthemum 'Mei-kyo' problems — and how to fix them
Chrysanthemum 'Mei-kyo' (Chrysanthemum 'Mei-kyo') 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.
Powdery mildew
Common in warm dry conditions; 'Mei-kyo' is relatively resistant but inspect lower foliage in late summer and treat promptly if affected.
Aphids
Soft shoot tips attract aphid colonies in spring; a strong water jet or insecticidal soap application deals with most infestations.
Botrytis
Affects spent flower heads in cool, damp autumn conditions; deadhead regularly and remove fallen petals from around plants.
Crown rot in heavy soils
The main winter threat; ensure good drainage and avoid planting in frost pockets where moisture accumulates.
Chrysanthemum leaf miner
Pale, winding tunnels through leaves; remove infested leaves early and use sticky yellow traps to monitor adult fly populations.
Prevent chrysanthemum 'mei-kyo' problems before they start
Most chrysanthemum 'mei-kyo' issues are care-mismatch, not bad luck. Dial in the basics:
Chrysanthemum 'Mei-kyo' problems — FAQ
Why is my chrysanthemum 'mei-kyo' powdery mildew?
Common in warm dry conditions; 'Mei-kyo' is relatively resistant but inspect lower foliage in late summer and treat promptly if affected.
Why is my chrysanthemum 'mei-kyo' aphids?
Soft shoot tips attract aphid colonies in spring; a strong water jet or insecticidal soap application deals with most infestations.
Why is my chrysanthemum 'mei-kyo' botrytis?
Affects spent flower heads in cool, damp autumn conditions; deadhead regularly and remove fallen petals from around plants.
Why is my chrysanthemum 'mei-kyo' crown rot in heavy soils?
The main winter threat; ensure good drainage and avoid planting in frost pockets where moisture accumulates.
Why is my chrysanthemum 'mei-kyo' chrysanthemum leaf miner?
Pale, winding tunnels through leaves; remove infested leaves early and use sticky yellow traps to monitor adult fly populations.