Troubleshooting
Grand Cape Primrose problems — and how to fix them
Grand Cape Primrose (Streptocarpus grandis) 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.
Leaf base rot
Water collecting at the base of the single leaf leads to fungal rot; the leaf yellows and collapses. There is no recovery once the main leaf is destroyed — prevention through careful watering is essential.
Botrytis (grey mould)
Fluffy grey fungal growth appears on damaged or senescent leaf tissue in cool, humid, poorly ventilated conditions. Remove affected areas promptly with sterile scissors, improve airflow, and apply a copper-based fungicide if severe.
Prevent grand cape primrose problems before they start
Most grand cape primrose issues are care-mismatch, not bad luck. Dial in the basics:
Grand Cape Primrose problems — FAQ
Why is my grand cape primrose leaf base rot?
Water collecting at the base of the single leaf leads to fungal rot; the leaf yellows and collapses. There is no recovery once the main leaf is destroyed — prevention through careful watering is essential.
Why is my grand cape primrose botrytis (grey mould)?
Fluffy grey fungal growth appears on damaged or senescent leaf tissue in cool, humid, poorly ventilated conditions. Remove affected areas promptly with sterile scissors, improve airflow, and apply a copper-based fungicide if severe.