Troubleshooting
Slipper Flower problems — and how to fix them
Slipper Flower (Calceolaria integrifolia) 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.
Heat-induced flowering failure
Plants stop flowering and decline rapidly when temperatures consistently exceed 25 °C (77 °F); position in afternoon shade in summer or treat as a cool-season annual in warm climates.
Slugs, snails, and aphids
Soft foliage is attractive to slugs and snails in damp conditions; use slug pellets or barriers, and inspect the undersides of leaves for aphid colonies, treating with insecticidal soap.
Prevent slipper flower problems before they start
Most slipper flower issues are care-mismatch, not bad luck. Dial in the basics:
Slipper Flower problems — FAQ
Why is my slipper flower heat-induced flowering failure?
Plants stop flowering and decline rapidly when temperatures consistently exceed 25 °C (77 °F); position in afternoon shade in summer or treat as a cool-season annual in warm climates.
Why is my slipper flower slugs, snails, and aphids?
Soft foliage is attractive to slugs and snails in damp conditions; use slug pellets or barriers, and inspect the undersides of leaves for aphid colonies, treating with insecticidal soap.