Sempervivum montanum

The mountain houseleek, a small, dark-green, hairy rosette of high siliceous rocks in the Alps, Pyrenees, Corsica and Carpathians. It is fully hardy and wants a real winter. Grow it outdoors in full sun in a lean, acidic, gritty mix that never stays wet.

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

It grows on acidic (siliceous) rock outcrops, scree and stony alpine grassland, typically above the treeline, and is often under snow for several months.

Recorded from 390 to 3580 m, with a median of about 2200 m. Most sites are subalpine to alpine.

AustriaCorseCzechia-SlovakiaFranceItalyPolandSpainSwitzerland

🔒 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 2.0 be licence, unmodified.