Houseleek
Sempervivum, family Crassulaceae
A hardy succulent with rosettes of fleshy leaves, often grown on roofs and walls
Houseleek is a genus of about 40 succulent perennial species forming tight leaf rosettes. Native across mountainous regions from Morocco to Iran, it thrives in dry, rocky places and has been traditionally planted on roofs for protection.
- Leaves stay green through winter, earning the name 'always living'
- Dies after flowering but leaves behind many offsets
- Flowers are star-shaped with more than six petals
- Used historically to color food pink or deepen saffron yellow
- Grows naturally on old roofs and stone walls outside its native range
What does Houseleek look like?
Houseleeks grow as clusters of thick, fleshy leaves arranged in tight rosettes. These evergreen succulents store water in their leaves, allowing survival in dry, exposed spots. Their small flowers appear in star-like clusters and range from reddish to yellowish or pinkish, rarely white.
Where does Houseleek come from?
The name Sempervivum comes from Latin words meaning 'always living', reflecting its hardiness and evergreen leaves. It grows wild across a wide arc of mountains from North Africa through southern Europe to western Asia. Some related genera like Jovibarba occur in Macaronesia.
When and how Houseleek blooms
Each rosette lives several years before sending up a single flower stalk, after which it dies, but not before producing many offsets, or 'chicks'. These new rosettes spread outward, forming dense mats. They thrive in well-drained, sandy soil and full sun, tolerating cold down to US zone 4.
How Houseleek is used
Traditionally planted on thatched roofs and stone walls, houseleek was believed to protect homes from lightning and fire. Its leaf juice has been used in folk medicine for burns, insect bites, diarrhea, and skin conditions. It also served as a natural food colorant in medieval Arab cuisine.
Kinds of Houseleek
Over forty species are recognized, though boundaries are blurred by natural hybrids and environmental variation. In the Alps, common types include S. tectorum, S. montanum, and the cobwebbed S. arachnoideum. Cultivars focus on leaf shape and color rather than flowers.
What Houseleek means
European folklore links houseleek to thunder gods, Jupiter in Rome and Thor in Norse myth, hence names like 'Jupiter’s beard'. A Welsh belief holds that roof-growing houseleek brings health and prosperity. It has no close relation to the edible leek despite the name.
Questions people ask about Houseleek
Where does houseleek come from?
It grows wild from Morocco through southern Europe to Iran, especially in mountainous, rocky areas including the Alps, Balkans, and Caucasus.
Why is it called 'houseleek'?
The name comes from Anglo-Saxon 'leac' meaning plant, as it commonly grew on house roofs. It is not related to the edible leek.
What was houseleek used for in traditional medicine?
Its leaf juice was applied to burns, warts, and insect bites, or taken for diarrhea. Herbalist Culpepper noted its use for inflammation, eye issues, and gout.
Does it really protect houses from lightning?
European folklore claimed it did, linking it to thunder gods like Jupiter and Thor. This belief led to deliberate planting on roofs for protection.
How does houseleek reproduce?
Mainly by producing lateral offsets ('hen and chicks'). It also makes tiny seeds, but each rosette dies after flowering once.
Good reading and sources
- Encyclopaedia BritannicaArticle
- Sempervivum 'Bronco'Royal Horticultural Society, Article
- USDA Plants DatabaseUS Department of Agriculture, Article
- Plants of the World OnlineRoyal Botanic Gardens, Kew, Plant database
- Where it has been recordedGBIF, Plant database
- Sightings and photos by naturalistsiNaturalist, Plant database
The facts on this page come from the Wikipedia article "Sempervivum", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Phool rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. It is not medical or foraging advice: many flowers are poisonous, and traditional uses are reported, not recommended. If something is wrong, tell us. Last refreshed 2026-10-03.
Others in the family Crassulaceae
The whole family
Kalanchoe blossfeldiana
A compact succulent with bright winter blooms from Madagascar
🇲🇬 Madagascar and 1 more · Garden flower
Showy stonecropHylotelephium spectabile
A pink-flowered succulent from China, popular in gardens and bouquets
🇨🇳 China · Garden flower
Rhodiola rosea
A hardy Arctic wildflower with yellow-green blooms and a thick, scaly root
🇨🇳 China and 4 more · Wildflower
StonecropSedum
A group of succulent plants with star-shaped flowers and fleshy leaves
Sedum · Wildflower
More from Morocco
All the flowers of Morocco
Wild cherryPrunus avium
A tall flowering tree native to Europe, grown for its sweet fruit and spring blossom
🇮🇹 Italy and 6 more · Flowering tree
Narcissus
Spring-flowering bulbs with trumpet-shaped blooms in white, yellow, and orange
🇬🇧 United Kingdom and 7 more · Wildflower
OleanderNerium oleander
A showy, evergreen shrub with clusters of pink, white or red flowers
🇲🇦 Morocco and 8 more · Flowering shrub
Bay laurelLaurus nobilis
Evergreen tree with aromatic leaves used as bay leaf in cooking
🇬🇷 Greece and 9 more · Flowering tree