Common houseleek
Also known as
Hen-and-chicks, Hens and chickens, Roof houseleek, Jupiter's beard, Thunder plant
Keep this plant’s care guide close at hand.
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Sempervivum tectorum, commonly called common houseleek or hens-and-chicks, is a cold-hardy, rosette-forming succulent native to mountainous and rocky parts of Europe. It forms tight, symmetrical rosettes 5–15 cm across of fleshy, pointed leaves, often tipped or flushed red in strong sun or cool weather. Mature rosettes (the “hens”) produce numerous offsets (“chicks”) on short stolons, creating expanding mats. In summer, a mature rosette sends up a sturdy, 15–30 cm flower stalk topped with starry pink to reddish blooms; the flowering rosette is monocarpic and dies afterward, but offsets quickly fill the gap. Adapted to extreme drought and thin, mineral soils, S. tectorum thrives where many plants fail—on walls, rock gardens, and even rooftops, as its species name (“of roofs”) suggests. Its shallow, fibrous roots and waxy leaves store water efficiently, while excellent drainage prevents rot. Easy, durable, and architectural, it excels in containers, troughs, xeriscapes, and green roofs.
Taxonomy
Properties & Requirements
How to care for Common houseleek
Water
Water deeply but infrequently, allowing the medium to dry completely between soakings. In spring and early summer, water when pots feel very light or leaves lose sheen—often every 10–21 days outdoors, adjusting for rainfall. In peak summer heat and in winter, reduce drastically and keep almost dry, especially in humid climates. Always water the substrate, not the rosette center, and avoid evening overhead irrigation. Ensure instant drainage and discard any standing water from saucers.
Light
Provide abundant light. Outdoors, give full sun (6+ hours) for tight rosettes and best coloration; in very hot deserts, offer light afternoon shade. Indoors, use the sunniest south- or west-facing window, or supplement with 10,000–20,000 lux LED grow lights for 12–14 hours daily. Insufficient light causes stretched, loose rosettes and dull color. Acclimate plants gradually when moving from shade or indoors to prevent leaf scorch.
Nutrients
Feed sparingly. In lean, gritty soil, Sempervivum tectorum needs little to no fertilizer. If desired, apply a low-nitrogen cactus/succulent fertilizer at 1/4–1/2 strength once in mid-spring as growth resumes. Avoid nutrient-rich, water-retentive mixes and slow-release pellets that encourage soft, rot-prone growth. Do not fertilize in winter or during peak summer heat. Excess fertilizer can cause elongated rosettes and diminish coloration.
Temperature
Exceptionally cold-hardy when kept dry: tolerates about -30°C (-22°F), USDA Zones 3–8. Ideal growing temperatures are cool to mild, roughly 10–24°C (50–75°F) with good airflow. Prolonged hot, humid nights can stress plants; provide afternoon shade and extra drainage in warm climates. Overwinter outdoors in free-draining media; for containers, shield from persistent winter wet. Indoors, avoid overheated rooms—cool nights improve color and vigor.
