Chrysanthemum 'Bronze Elegance' problems — and how to fix them

Can appear in late summer; apply sulphur-based fungicide or potassium bicarbonate spray at first signs and remove affected leaves.

Cluster on soft new growth; spray with a strong jet of water or treat with insecticidal soap.

Poor winter drainage is the main risk for overwintering Korean mums; raise beds or grow in free-draining soil and mulch crowns well after frost.

Feed on young spring shoots; apply biological nematode treatments or use iron phosphate pellets around emerging crowns in early spring.

Dark spots on lower leaves in wet conditions; remove infected foliage and avoid overhead watering.