Troubleshooting
Sempervivum 'Red Lion' problems — and how to fix them
Sempervivum 'Red Lion' (Sempervivum 'Red Lion') 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 red colour
The ruby tone depends on full sun, cool temperatures, and lean conditions. In shade, warmth, or with feeding the rosettes turn green; increase light, reduce fertiliser, and accept that summer heat naturally mutes the colour.
Root and crown rot
Overwatering or water-retentive soil rots the plant, the main cause of failure. Use a gritty mix, water only when fully dry, and keep nearly dry in winter.
Etiolation
Too little light stretches and pales the rosettes. Move to the brightest available position or add a grow light to keep the form compact and colourful.
Mealybugs and vine weevil
Mealybugs hide among the leaves and weevil grubs chew roots. Examine the crown and rootball, treat with diluted alcohol or an appropriate systemic, and ensure good airflow.
Prevent sempervivum 'red lion' problems before they start
Most sempervivum 'red lion' issues are care-mismatch, not bad luck. Dial in the basics:
Looking for sempervivum 'red lion' in general rather than its problems? Read the full sempervivum 'red lion' care guide — light, water, soil and feeding.
Sempervivum 'Red Lion' problems — FAQ
Why is my sempervivum 'red lion' loss of red colour?
The ruby tone depends on full sun, cool temperatures, and lean conditions. In shade, warmth, or with feeding the rosettes turn green; increase light, reduce fertiliser, and accept that summer heat naturally mutes the colour.
Why is my sempervivum 'red lion' root and crown rot?
Overwatering or water-retentive soil rots the plant, the main cause of failure. Use a gritty mix, water only when fully dry, and keep nearly dry in winter.
Why is my sempervivum 'red lion' etiolation?
Too little light stretches and pales the rosettes. Move to the brightest available position or add a grow light to keep the form compact and colourful.
Why is my sempervivum 'red lion' mealybugs and vine weevil?
Mealybugs hide among the leaves and weevil grubs chew roots. Examine the crown and rootball, treat with diluted alcohol or an appropriate systemic, and ensure good airflow.