Sempervivum stenopetalum

A natural hybrid houseleek (Sempervivum ×stenopetalum) named in 1855 and recorded from France. Like its alpine parents it wants full sun, a gritty fast-draining mix, cold winters outdoors and no wet feet.

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

Inferred from the genus: rosettes on sunny rock outcrops, scree and thin soils in mountains, often where both parent species grow together.

Probably montane to subalpine (roughly 1,000–2,500 m) like most French Sempervivum; the measured site is a lowland centroid at 145 m.

France

🔒 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.