Troubleshooting
Pelargonium capitatum problems — and how to fix them
Pelargonium capitatum (Pelargonium capitatum) 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.
Soft-stem and root rot
Its succulent sprawling stems rot fast in wet soil. Use very sharp drainage, water only when well dry and avoid waterlogging, especially in winter.
Sprawling, untidy habit
Vigorous spreading stems can become open and floppy. Prune and pinch in spring to keep the plant dense and within bounds.
Pelargonium rust
Brown, yellow-ringed pustules appear on leaf undersides in damp conditions. Remove affected leaves, improve airflow and keep foliage dry.
Whitefly under glass
Overwintered plants attract whitefly. Check leaf undersides and treat early with insecticidal soap or yellow sticky traps.
Prevent pelargonium capitatum problems before they start
Most pelargonium capitatum issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pelargonium capitatum in general rather than its problems? Read the full pelargonium capitatum care guide — light, water, soil and feeding.
Pelargonium capitatum problems — FAQ
Why is my pelargonium capitatum soft-stem and root rot?
Its succulent sprawling stems rot fast in wet soil. Use very sharp drainage, water only when well dry and avoid waterlogging, especially in winter.
Why is my pelargonium capitatum sprawling, untidy habit?
Vigorous spreading stems can become open and floppy. Prune and pinch in spring to keep the plant dense and within bounds.
Why is my pelargonium capitatum pelargonium rust?
Brown, yellow-ringed pustules appear on leaf undersides in damp conditions. Remove affected leaves, improve airflow and keep foliage dry.
Why is my pelargonium capitatum whitefly under glass?
Overwintered plants attract whitefly. Check leaf undersides and treat early with insecticidal soap or yellow sticky traps.