Light
Full Sun
Requires full sun (at least 6 hours of direct sunlight) to maintain compact growth and vibrant colors.
Reference image 
Reference image Sempervivum tectorum
Common Houseleek
Overview
Sempervivum tectorum, commonly known as the Common Houseleek or Hens and Chicks, is an exceptionally hardy, evergreen, rosette-forming succulent perennial belonging to the family Crassulaceae. For centuries, it has been planted on the roofs of rural European dwellings to protect against lightning and fire, a tradition that gave rise to its specific epithet "tectorum," meaning "of roofs."
Taxonomy and Naming
The genus name Sempervivum is derived from the Latin "semper" (always) and "vivus" (living), referring to the plant's remarkable persistence. It was formally described by Carl Linnaeus in his landmark work Species Plantarum in 1753 1.
Distribution and Habitat
This species is native to the mountainous regions of Southern and Central Europe, particularly the Alps, Pyrenees, and Apennines 2. It thrives at elevations up to 2,800 meters, typically colonizing rocky crevices, gravelly slopes, and nutrient-poor alpine grasslands.
Appearance
The fleshy, obovate leaves form dense, symmetrical rosettes reaching 10-20 cm in diameter. The leaves are typically blue-green, often tipped with reddish-purple margins. In mid-to-late summer, mature rosettes produce an upright, hairy flower stalk (20-30 cm tall) bearing clusters of star-shaped, rose-pink flowers. It is monocarpic, meaning the flowering rosette dies after blooming, but not before producing numerous offsets around its base.
Cultivation
An ideal candidate for rock gardens, stone walls, and alpine troughs. It requires full sun and highly porous, sandy, or gravelly soil. It is extremely drought-tolerant and frost-hardy down to sub-zero temperatures.
Common Cultivation Mistakes
The most prevalent issue is waterlogging due to heavy, clay-rich soil, which leads to root rot. Insufficient light causes the plant to become etiolated, resulting in loose, pale rosettes.
References
Watering
10-30 Days
Allow soil to dry out completely between waterings. Highly sensitive to overwatering.
Soil
Highly well-draining, sandy and gritty, nutrient-poor cactus and succulent soil mix.
Thrives in nutrient-poor, sandy, or gritty succulent mix with excellent drainage.
Safety
Pet Friendly
Non-toxic and perfectly safe for cats, dogs, and children.
Difficulty
Very Easy
Very easy; virtually indestructible as long as it is not overwatered or kept in deep shade.
Native Habitat
Europe (Alps, Pyrenees, Carpathians)
Native to the high-altitude rocky crevices and mountain slopes of Central and Southern Europe, adapted to survive extreme cold and intense solar radiation.
Frequently Asked Questions
Can Common Houseleek grow indoors?
It is primarily an outdoor plant. Indoors, it often suffers from a lack of light and air circulation. It is highly recommended to keep it outdoors unless you have a very sunny, south-facing windowsill.
Why is my plant dying after flowering?
This plant is monocarpic, meaning each rosette flowers once and then dies. However, before dying, it produces multiple offsets (chicks) that will continue to grow and occupy the space.
Is it frost hardy?
Yes, it is extremely cold-hardy. It can easily withstand harsh winter freezes down to -25°C or -30°C, even when covered in snow.
How often should I water it?
Water thoroughly only when the soil is completely dry (roughly every 10 days in summer). In winter, withhold water almost entirely, watering only once a month or not at all.
What kind of soil does it need?
It requires poor, highly gritty soil. Combine standard potting soil with plenty of coarse sand, perlite, or pumice to ensure immaculate drainage.
Is it toxic to pets?
No, *Sempervivum tectorum* is completely non-toxic to cats, dogs, and other domestic pets.
Why are the leaves losing their color?
A lack of sunlight causes the rosettes to turn green and flatten out. Full sun exposure is essential to bring out the beautiful red and purple leaf tips.
How do I propagate the offsets?
Gently pull or cut the small offsets away from the mother plant. Let the cut dry for a few days to form a callus, then place them on well-draining soil.
When should I repot it?
Repot in spring or early summer when the colony crowds the edges of the pot. Shallow containers are preferred over deep pots due to their shallow root systems.
Does it need fertilizer?
It requires very little nutrients. You can apply a half-strength succulent fertilizer once in spring. Excessive fertilization causes weak, leggy growth.