Troubleshooting
Auricula Primrose problems — and how to fix them
Auricula Primrose (Primula auricula) 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.
Vine weevil (Otiorhynchus sulcatus)
The most serious pest of pot-grown auriculas. Grubs eat roots, causing sudden collapse. Apply nematode biological controls (Steinernema kraussei) in spring and autumn when soil is above 5°C. Check root systems when repotting; destroy any white C-shaped grubs found.
Botrytis and crown rot
Grey mould affects flowers and foliage in damp, still conditions, particularly when water lodges in the crown. Protect from overhead rain, ensure good air circulation, and remove any dead foliage promptly. Always water at the base of the plant.
Neck (stem) elongation
As auriculas age, the rosette develops on a long, bare neck (the carrot). This is natural but the plant becomes unstable and looks untidy. Repot annually in spring, burying the neck up to the base of the leaf rosette to stabilise the plant and encourage new roots.
Prevent auricula primrose problems before they start
Most auricula primrose issues are care-mismatch, not bad luck. Dial in the basics:
Auricula Primrose problems — FAQ
Why is my auricula primrose vine weevil (otiorhynchus sulcatus)?
The most serious pest of pot-grown auriculas. Grubs eat roots, causing sudden collapse. Apply nematode biological controls (Steinernema kraussei) in spring and autumn when soil is above 5°C. Check root systems when repotting; destroy any white C-shaped grubs found.
Why is my auricula primrose botrytis and crown rot?
Grey mould affects flowers and foliage in damp, still conditions, particularly when water lodges in the crown. Protect from overhead rain, ensure good air circulation, and remove any dead foliage promptly. Always water at the base of the plant.
Why is my auricula primrose neck (stem) elongation?
As auriculas age, the rosette develops on a long, bare neck (the carrot). This is natural but the plant becomes unstable and looks untidy. Repot annually in spring, burying the neck up to the base of the leaf rosette to stabilise the plant and encourage new roots.