Troubleshooting
Cape Primrose problems — and how to fix them
Cape Primrose (Streptocarpus × hybridus) 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.
Botrytis / grey mould
Fuzzy grey patches on leaves and flowers from cool, damp, stagnant conditions or water sitting on foliage. Remove affected parts, improve airflow, keep leaves dry, and avoid misting.
Root and crown rot
Yellowing, mushy leaf bases and a collapsing centre from overwatering or soggy mix. Let the surface dry between waterings, water at the soil edge, and ensure free drainage.
No flowers
Usually too little light or no winter rest. Move to brighter indirect light and give a cooler (~13 C), drier dormancy in winter to trigger the next bloom flush.
Brown, crispy leaf tips
Typically low humidity or dry air near heat sources. Raise local humidity with a pebble tray and keep the plant away from radiators and vents.
Mealybugs and aphids
White cottony tufts in leaf joints or clusters of soft insects on new growth and flower stalks. Wipe off, rinse, and treat with insecticidal soap, repeating to catch survivors.
Cyclamen / broad mites
Distorted, stunted, hardened new growth and aborted buds caused by microscopic mites. Isolate the plant, remove badly affected growth, and treat or discard severely infested specimens.
Prevent cape primrose problems before they start
Most cape primrose issues are care-mismatch, not bad luck. Dial in the basics:
Cape Primrose problems — FAQ
Why is my cape primrose botrytis / grey mould?
Fuzzy grey patches on leaves and flowers from cool, damp, stagnant conditions or water sitting on foliage. Remove affected parts, improve airflow, keep leaves dry, and avoid misting.
Why is my cape primrose root and crown rot?
Yellowing, mushy leaf bases and a collapsing centre from overwatering or soggy mix. Let the surface dry between waterings, water at the soil edge, and ensure free drainage.
Why is my cape primrose no flowers?
Usually too little light or no winter rest. Move to brighter indirect light and give a cooler (~13 C), drier dormancy in winter to trigger the next bloom flush.
Why is my cape primrose brown, crispy leaf tips?
Typically low humidity or dry air near heat sources. Raise local humidity with a pebble tray and keep the plant away from radiators and vents.
Why is my cape primrose mealybugs and aphids?
White cottony tufts in leaf joints or clusters of soft insects on new growth and flower stalks. Wipe off, rinse, and treat with insecticidal soap, repeating to catch survivors.
Why is my cape primrose cyclamen / broad mites?
Distorted, stunted, hardened new growth and aborted buds caused by microscopic mites. Isolate the plant, remove badly affected growth, and treat or discard severely infested specimens.