Troubleshooting
Pelargonium 'Mr Wren' problems — and how to fix them
Pelargonium 'Mr Wren' (Pelargonium 'Mr Wren') 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.
Loss of white petal edge
The picotee margin is variable and can fade in dull weather or low light. Grow in full sun and warmth for the clearest red-and-white markings.
Pelargonium rust
Concentric brown pustules on leaf undersides. Remove affected leaves, space plants for airflow, and keep water off the foliage.
Botrytis (grey mould)
Grey mould on faded flowers and old leaves in damp conditions. Deadhead regularly, clear debris, and ventilate well.
Leggy, sparse plants
From low light or no pinching. Pinch out shoot tips in spring and grow in full sun to keep it bushy and floriferous.
Prevent pelargonium 'mr wren' problems before they start
Most pelargonium 'mr wren' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pelargonium 'mr wren' in general rather than its problems? Read the full pelargonium 'mr wren' care guide — light, water, soil and feeding.
Pelargonium 'Mr Wren' problems — FAQ
Why is my pelargonium 'mr wren' loss of white petal edge?
The picotee margin is variable and can fade in dull weather or low light. Grow in full sun and warmth for the clearest red-and-white markings.
Why is my pelargonium 'mr wren' pelargonium rust?
Concentric brown pustules on leaf undersides. Remove affected leaves, space plants for airflow, and keep water off the foliage.
Why is my pelargonium 'mr wren' botrytis (grey mould)?
Grey mould on faded flowers and old leaves in damp conditions. Deadhead regularly, clear debris, and ventilate well.
Why is my pelargonium 'mr wren' leggy, sparse plants?
From low light or no pinching. Pinch out shoot tips in spring and grow in full sun to keep it bushy and floriferous.