Troubleshooting
Houseleek Cliff Stonecrop problems — and how to fix them
Houseleek Cliff Stonecrop (Prometheum sempervivoides) 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.
Winter rot in wet conditions
Even though it is frost hardy, wet winter soil combined with cold causes crown rot. Ensure sharp drainage year-round; a gravel mulch around rosettes helps shed moisture away from the crown.
Aphids on flower stems
Emerging flower stalks attract aphid colonies. Remove with a jet of water or apply insecticidal soap in the early morning, avoiding open flowers.
Loss of compact form in shade
Shade causes the rosettes to become loose and etiolated, losing their houseleek-like symmetry. Relocate to full sun; compact growth resumes in the next season.
Prevent houseleek cliff stonecrop problems before they start
Most houseleek cliff stonecrop issues are care-mismatch, not bad luck. Dial in the basics:
Houseleek Cliff Stonecrop problems — FAQ
Why is my houseleek cliff stonecrop winter rot in wet conditions?
Even though it is frost hardy, wet winter soil combined with cold causes crown rot. Ensure sharp drainage year-round; a gravel mulch around rosettes helps shed moisture away from the crown.
Why is my houseleek cliff stonecrop aphids on flower stems?
Emerging flower stalks attract aphid colonies. Remove with a jet of water or apply insecticidal soap in the early morning, avoiding open flowers.
Why is my houseleek cliff stonecrop loss of compact form in shade?
Shade causes the rosettes to become loose and etiolated, losing their houseleek-like symmetry. Relocate to full sun; compact growth resumes in the next season.