Troubleshooting
Banded Cape Primrose problems — and how to fix them
Banded Cape Primrose (Streptocarpus fasciatus) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Botrytis (grey mould) on leaves and crowns
Velvety foliage that stays damp — whether from overhead watering, misting, or poor air circulation — is extremely vulnerable to Botrytis cinerea; always water at the base, remove dead leaves promptly, and ensure ventilation around the plant.
Vine weevil larvae in compost
The C-shaped white grubs of vine weevil eat the roots, causing the plant to collapse suddenly; if a plant wilts despite correct watering, knock it out of its pot and inspect the roots — treat the compost with a nematode biological control (Steinernema kraussei) in late summer.
Prevent banded cape primrose problems before they start
Most banded cape primrose issues are care-mismatch, not bad luck. Dial in the basics:
Banded Cape Primrose problems — FAQ
Why is my banded cape primrose botrytis (grey mould) on leaves and crowns?
Velvety foliage that stays damp — whether from overhead watering, misting, or poor air circulation — is extremely vulnerable to Botrytis cinerea; always water at the base, remove dead leaves promptly, and ensure ventilation around the plant.
Why is my banded cape primrose vine weevil larvae in compost?
The C-shaped white grubs of vine weevil eat the roots, causing the plant to collapse suddenly; if a plant wilts despite correct watering, knock it out of its pot and inspect the roots — treat the compost with a nematode biological control (Steinernema kraussei) in late summer.