Sempervivum minutum

A tiny houseleek from the high Sierra Nevada of southern Spain, forming small, dense rosettes on rocky slopes above about 2,000 m. It wants full sun, a cold, snowy winter, a dry summer and a lean mineral mix; it is fully hardy and is best grown outdoors in a trough or rock garden.

At home, aim for

Day Cool-growingTargets in Plantistry

Night Close to the dayTargets in Plantistry

Humidity Dry airBand in Plantistry

Light Full sunDLI and PPFD in Plantistry

Expects a seasonal restGrows on rock (lithophyte)

Where it grows wild

Rocky slopes, scree and rock crevices in the high mountain zone, in open, sunny, wind-exposed sites on siliceous rock.

Records span 306 to 3,482 m, median 2,450 m; most come from the high Sierra Nevada and Sierra de Baza.

Spain

🔒 Growing it like that

The wild conditions above, turned into targets for a shelf, a tent or a greenhouse. The full profile has:

✓ Day and night temperature targets, and the limits it tolerates

✓ Humidity band, and how to hold it

✓ Light as DLI and PPFD for a grow light

✓ Wet and dry seasons, and whether to rest it

✓ Substrate and airflow

✓ A step-by-step setup to grow it like the wild

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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app. Photo from Wikimedia Commons, used under its CC BY-SA 2.5 licence, unmodified.