Troubleshooting
Painted Daisy problems — and how to fix them
Painted Daisy (Tanacetum coccineum) 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 hot, dry summers with poor airflow. Ensure good spacing (30–40 cm), water at soil level, and apply a preventive sulphur-based fungicide if outbreaks are recurring.
Aphids on new growth
Soft spring shoots attract greenfly. Check regularly and treat early with insecticidal soap or a jet of water. Natural predators (ladybirds, lacewings) usually control populations once established.
Declining after 3–4 years
Clumps become woody and flower less freely with age. Divide every 2–3 years in early spring or autumn, replanting vigorous outer portions and discarding the woody centre.
Prevent painted daisy problems before they start
Most painted daisy issues are care-mismatch, not bad luck. Dial in the basics:
Painted Daisy problems — FAQ
Why is my painted daisy powdery mildew?
Common in hot, dry summers with poor airflow. Ensure good spacing (30–40 cm), water at soil level, and apply a preventive sulphur-based fungicide if outbreaks are recurring.
Why is my painted daisy aphids on new growth?
Soft spring shoots attract greenfly. Check regularly and treat early with insecticidal soap or a jet of water. Natural predators (ladybirds, lacewings) usually control populations once established.
Why is my painted daisy declining after 3–4 years?
Clumps become woody and flower less freely with age. Divide every 2–3 years in early spring or autumn, replanting vigorous outer portions and discarding the woody centre.