Troubleshooting
Bitterroot Lewisia problems — and how to fix them
Bitterroot Lewisia (Lewisia cotyledon) 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.
Crown rot
The primary cause of death; caused by water sitting in the rosette. Plant at a 45-degree angle in walls or vertical crevices, and ensure water cannot pool on the crown. Remove dead leaves promptly.
Botrytis (grey mould)
Fungal grey mould develops in cold, wet, still conditions. Improve ventilation, remove dead foliage, and use a systemic fungicide if needed. An alpine house or cold frame in wet winters is effective prevention.
Failure to flower after first year
Often caused by too much shade or overwatering. Ensure at least 4–6 hours of sun and allow the summer dry period — skipping it prevents flower initiation.
Prevent bitterroot lewisia problems before they start
Most bitterroot lewisia issues are care-mismatch, not bad luck. Dial in the basics:
Bitterroot Lewisia problems — FAQ
Why is my bitterroot lewisia crown rot?
The primary cause of death; caused by water sitting in the rosette. Plant at a 45-degree angle in walls or vertical crevices, and ensure water cannot pool on the crown. Remove dead leaves promptly.
Why is my bitterroot lewisia botrytis (grey mould)?
Fungal grey mould develops in cold, wet, still conditions. Improve ventilation, remove dead foliage, and use a systemic fungicide if needed. An alpine house or cold frame in wet winters is effective prevention.
Why is my bitterroot lewisia failure to flower after first year?
Often caused by too much shade or overwatering. Ensure at least 4–6 hours of sun and allow the summer dry period — skipping it prevents flower initiation.