Troubleshooting
Hairy Primrose problems — and how to fix them
Hairy Primrose (Primula hirsuta) 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.
Crown and root rot
Water sitting in the rosette, particularly in cold, wet winters, causes rapid rot of the crown. Grow under glass in an alpine house or frame with overhead protection from autumn to spring.
Grey mould (Botrytis cinerea)
A common issue in humid, still conditions; dead or dying leaf tissue is quickly colonised. Remove spent leaves promptly and ensure good air circulation.
Aphids
Colonies cluster on new growth and flower stems, distorting leaves and buds; treat with an insecticidal soap spray, avoiding contact with the foliage if possible.
Prevent hairy primrose problems before they start
Most hairy primrose issues are care-mismatch, not bad luck. Dial in the basics:
Hairy Primrose problems — FAQ
Why is my hairy primrose crown and root rot?
Water sitting in the rosette, particularly in cold, wet winters, causes rapid rot of the crown. Grow under glass in an alpine house or frame with overhead protection from autumn to spring.
Why is my hairy primrose grey mould (botrytis cinerea)?
A common issue in humid, still conditions; dead or dying leaf tissue is quickly colonised. Remove spent leaves promptly and ensure good air circulation.
Why is my hairy primrose aphids?
Colonies cluster on new growth and flower stems, distorting leaves and buds; treat with an insecticidal soap spray, avoiding contact with the foliage if possible.