Troubleshooting
Toothed Nemesia problems — and how to fix them
Toothed Nemesia (Nemesia denticulata) 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.
Root and stem rot
Overwatering or poorly drained soil rapidly causes basal stem rot, particularly in warm weather; always use free-draining compost and allow the soil surface to dry slightly between waterings.
Heat-induced flowering pause
Plants often stop blooming in midsummer heat above 25°C; trim back spent stems and ensure adequate watering and the plant will reflower as temperatures cool.
Prevent toothed nemesia problems before they start
Most toothed nemesia issues are care-mismatch, not bad luck. Dial in the basics:
Toothed Nemesia problems — FAQ
Why is my toothed nemesia root and stem rot?
Overwatering or poorly drained soil rapidly causes basal stem rot, particularly in warm weather; always use free-draining compost and allow the soil surface to dry slightly between waterings.
Why is my toothed nemesia heat-induced flowering pause?
Plants often stop blooming in midsummer heat above 25°C; trim back spent stems and ensure adequate watering and the plant will reflower as temperatures cool.