Troubleshooting
Marble Houseleek problems — and how to fix them
Marble Houseleek (Sempervivum marmoreum) 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
Caused by excess moisture, particularly in winter. Ensure perfectly drained substrate, water only at the base, and protect outdoor containers from prolonged rain in cold months.
Loss of marbled colouration
The distinctive red marbling fades in low light. Increase sun exposure — the best coloration develops under strong direct sunlight with some temperature stress (cool nights).
Vine weevil (outdoors)
Vine weevil grubs eat roots, causing rosettes to collapse suddenly. Inspect roots when re-potting and apply a biological nematode control (Steinernema kraussei) in late summer.
Prevent marble houseleek problems before they start
Most marble houseleek issues are care-mismatch, not bad luck. Dial in the basics:
Looking for marble houseleek in general rather than its problems? Read the full marble houseleek care guide — light, water, soil and feeding.
Marble Houseleek problems — FAQ
Why is my marble houseleek crown rot?
Caused by excess moisture, particularly in winter. Ensure perfectly drained substrate, water only at the base, and protect outdoor containers from prolonged rain in cold months.
Why is my marble houseleek loss of marbled colouration?
The distinctive red marbling fades in low light. Increase sun exposure — the best coloration develops under strong direct sunlight with some temperature stress (cool nights).
Why is my marble houseleek vine weevil (outdoors)?
Vine weevil grubs eat roots, causing rosettes to collapse suddenly. Inspect roots when re-potting and apply a biological nematode control (Steinernema kraussei) in late summer.