Troubleshooting
Sunsatia Mango Nemesia problems — and how to fix them
Sunsatia Mango Nemesia (Nemesia strumosa) 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.
Heat-induced dormancy
Plants cease flowering above about 25-27°C; cut back by one-third, reduce watering slightly, and await cooler autumn temperatures for a second flush.
Root rot
Overwatering or poorly draining compost causes sudden wilting; improve drainage and let soil dry out slightly between waterings.
Powdery mildew
White powdery spots on leaves in warm, dry or humid conditions; apply a bicarbonate-based spray and improve air circulation.
Aphids
Green or black aphids on soft new growth; treat with insecticidal soap early to prevent colony spread.
Legginess
Pinch out growing tips on young plants to encourage branching; regular deadheading of spent flowers also maintains a compact, floriferous habit.
Prevent sunsatia mango nemesia problems before they start
Most sunsatia mango nemesia issues are care-mismatch, not bad luck. Dial in the basics:
Sunsatia Mango Nemesia problems — FAQ
Why is my sunsatia mango nemesia heat-induced dormancy?
Plants cease flowering above about 25-27°C; cut back by one-third, reduce watering slightly, and await cooler autumn temperatures for a second flush.
Why is my sunsatia mango nemesia root rot?
Overwatering or poorly draining compost causes sudden wilting; improve drainage and let soil dry out slightly between waterings.
Why is my sunsatia mango nemesia powdery mildew?
White powdery spots on leaves in warm, dry or humid conditions; apply a bicarbonate-based spray and improve air circulation.
Why is my sunsatia mango nemesia aphids?
Green or black aphids on soft new growth; treat with insecticidal soap early to prevent colony spread.
Why is my sunsatia mango nemesia legginess?
Pinch out growing tips on young plants to encourage branching; regular deadheading of spent flowers also maintains a compact, floriferous habit.