Sempervivum calcareum
Sempervivum calcareum (Limestone Houseleek) Care Guide
Featured photosempervivum-calcareum.jpgSempervivum calcareum, sold as Limestone Houseleek, is a rosette succulent in Crassulaceae. An alpine Sempervivum with broad open rosettes of pale grey-blue leaves tipped in distinct dark purple-red. Restricted in the wild to limestone substrates, hence the species name. Like most members of its group it forms tight rosettes of thick fleshy leaves, tolerates long dry spells thanks to its water-storing tissue, and propagates readily from leaves or offsets.
Care facts at a glance
- Light
- Full sun
- Water
- Water deeply when the mix is fully dry.
- Humidity
- 20–50 %
- Temperature
- 5–27 °C
- Soil
- Free-draining gritty cactus mix with extra perlite or pumice.
- Origin
- Limestone outcrops of the southern French Alps and northern Italian Alps.
- Mature size
- 5 to 30 cm tall and wide depending on species.
Overview
Sempervivum calcareum sits in Crassulaceae, the same family as Sedum and Echeveria. An alpine Sempervivum with broad open rosettes of pale grey-blue leaves tipped in distinct dark purple-red. Restricted in the wild to limestone substrates, hence the species name. The thick succulent leaves store water reserves and the typical rosette architecture maximises sun capture in the species' open native habitats.
Care Priorities
- Full sun or very bright filtered light to keep rosettes compact.
- Free-draining gritty mix.
- Water deeply, then let the mix dry fully.
- Detach offsets to keep colonies tidy and propagate.
Common Problems
Stretched, pale rosettes are insufficient light. Mushy base is overwatering. Brown leaf tips are usually old age and harmless.
Sources & further reading (2)
- encyclopedia — accessed 2026-04-29
- botanical-garden — accessed 2026-04-29
Frequently asked questions
Why are the leaf tips so dark?
S. calcareum leaves carry distinctly pigmented red-purple tips that intensify in bright direct sun, contrasting strongly with the pale grey-blue body of the leaf. The pigmentation is genetic and consistent across the species; cultivars selected for particularly dark tips dominate retail.
Why is the rosette stretching upward?
Stretched, elongated rosettes indicate insufficient light. Most rosette succulents need direct sun for at least a few hours a day to stay tight; in dim conditions they reach for the brightest light and lose their compact shape.
Can I propagate from a single leaf?
Yes — most rosette succulents propagate readily from leaves. Twist a healthy leaf cleanly off the rosette, callus the wound for a day or two, and lay it on dry succulent mix. Roots and a new rosette typically appear within a few weeks.
