Troubleshooting
Pelargonium 'Mystery' problems — and how to fix them
Pelargonium 'Mystery' (Pelargonium 'Mystery') 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.
Reluctant flowering
Too little sun or an unpruned plant produces leaves over flowers. Move to full sun and prune in late winter to stimulate flowering wood.
Leggy sprawl
Unique types grow tall and lax; pinch shoots through the season and prune hard in early spring for a bushier shape.
Geranium rust
Brown pustules ringed yellow on leaf undersides in damp, still air. Remove affected leaves and improve airflow.
Whitefly and aphids
Frequent under glass on soft growth; monitor leaf undersides and treat early with insecticidal soap or biological controls.
Prevent pelargonium 'mystery' problems before they start
Most pelargonium 'mystery' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for pelargonium 'mystery' in general rather than its problems? Read the full pelargonium 'mystery' care guide — light, water, soil and feeding.
Pelargonium 'Mystery' problems — FAQ
Why is my pelargonium 'mystery' reluctant flowering?
Too little sun or an unpruned plant produces leaves over flowers. Move to full sun and prune in late winter to stimulate flowering wood.
Why is my pelargonium 'mystery' leggy sprawl?
Unique types grow tall and lax; pinch shoots through the season and prune hard in early spring for a bushier shape.
Why is my pelargonium 'mystery' geranium rust?
Brown pustules ringed yellow on leaf undersides in damp, still air. Remove affected leaves and improve airflow.
Why is my pelargonium 'mystery' whitefly and aphids?
Frequent under glass on soft growth; monitor leaf undersides and treat early with insecticidal soap or biological controls.