Chrysanthemum 'Emperor of China' problems — and how to fix them

Common on new growth in late summer; treat early with insecticidal soap to prevent spread to flower buds before they open.

Cool, damp autumn conditions favour grey mould; improve airflow and remove spent or damaged blooms promptly.

Excessive winter moisture is the main threat; ensure good drainage and apply a protective bark mulch over the crown after the top growth dies back.

Brown spots with yellow margins in wet summers; remove affected lower leaves and avoid wetting foliage when watering.

Larvae damage roots, especially in lighter soils; apply biological nematode treatment in late summer as a preventive measure.