Troubleshooting
Cockscomb problems — and how to fix them
Cockscomb (Celosia argentea var. cristata) 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.
Grey mould (Botrytis) on crests
The dense, velvety crests are prone to Botrytis in cool, humid conditions or after rain — avoid overhead watering, ensure good plant spacing for airflow and remove affected crests promptly.
Transplant shock / failure to establish
Cockscomb resents cold soil, root disturbance and transplanting into cool conditions — harden off thoroughly, do not plant out until night temperatures are reliably above 12°C, and handle root balls gently.
Spider mites in hot, dry conditions
Fine webbing and stippled, bronzed foliage indicate spider mites — increase air humidity around plants, apply insecticidal soap or neem oil, and ensure plants are not drought-stressed.
Prevent cockscomb problems before they start
Most cockscomb issues are care-mismatch, not bad luck. Dial in the basics:
Looking for cockscomb in general rather than its problems? Read the full cockscomb care guide — light, water, soil and feeding.
Cockscomb problems — FAQ
Why is my cockscomb grey mould (botrytis) on crests?
The dense, velvety crests are prone to Botrytis in cool, humid conditions or after rain — avoid overhead watering, ensure good plant spacing for airflow and remove affected crests promptly.
Why is my cockscomb transplant shock / failure to establish?
Cockscomb resents cold soil, root disturbance and transplanting into cool conditions — harden off thoroughly, do not plant out until night temperatures are reliably above 12°C, and handle root balls gently.
Why is my cockscomb spider mites in hot, dry conditions?
Fine webbing and stippled, bronzed foliage indicate spider mites — increase air humidity around plants, apply insecticidal soap or neem oil, and ensure plants are not drought-stressed.