Chrysanthemum 'Rumpelstiltskin' problems — and how to fix them

Grey-white powder on leaf surfaces in warm, dry periods. Improve airflow and apply a preventive potassium bicarbonate or sulphur spray.

Affects flowers and stems in wet, cool conditions. Remove infected plant parts and ensure good air circulation.

Create ragged petal damage overnight. Use earwig traps made from rolled damp newspaper near plant stems, checking each morning.

Cluster on young growth; honeydew leads to sooty mould. Control with insecticidal soap or neem oil, repeating weekly until clear.

Result of poorly drained soil or overwatering. Ensure excellent drainage and do not plant crown too deeply.