Troubleshooting
Pelargonium 'Copthorne' problems — and how to fix them
Pelargonium 'Copthorne' (Pelargonium 'Copthorne') 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.
Few flowers
Shade and high-nitrogen feeding produce leaves at the expense of its prized blooms. Give full sun and switch to a high-potash feed in the growing season.
Pelargonium rust
Yellow-ringed brown pustules on leaf undersides spread in humid, crowded conditions. Remove infected leaves promptly, increase airflow and keep foliage dry.
Stem and root rot
Overwatering and dense compost rot the fleshy base. Use a gritty, free-draining mix and water only when the surface has dried.
Whitefly and aphids
Sap-suckers congregate on soft new growth under glass. Check leaf undersides and treat early with insecticidal soap or a firm water spray.
Prevent pelargonium 'copthorne' problems before they start
Most pelargonium 'copthorne' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pelargonium 'copthorne' in general rather than its problems? Read the full pelargonium 'copthorne' care guide — light, water, soil and feeding.
Pelargonium 'Copthorne' problems — FAQ
Why is my pelargonium 'copthorne' few flowers?
Shade and high-nitrogen feeding produce leaves at the expense of its prized blooms. Give full sun and switch to a high-potash feed in the growing season.
Why is my pelargonium 'copthorne' pelargonium rust?
Yellow-ringed brown pustules on leaf undersides spread in humid, crowded conditions. Remove infected leaves promptly, increase airflow and keep foliage dry.
Why is my pelargonium 'copthorne' stem and root rot?
Overwatering and dense compost rot the fleshy base. Use a gritty, free-draining mix and water only when the surface has dried.
Why is my pelargonium 'copthorne' whitefly and aphids?
Sap-suckers congregate on soft new growth under glass. Check leaf undersides and treat early with insecticidal soap or a firm water spray.