Sempervivum pumilum

A tiny houseleek of the Caucasus, forming dense mats of small rosettes on alpine meadows and rocky slopes at about 1,800–2,400 m. It needs full sun, sharp drainage and a real frozen winter, and suffers in warm, humid lowland summers.

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

Open subalpine and alpine grassland, rock ledges and scree in the Greater Caucasus, where it sits in full sun and is snow-covered through the long winter.

Recorded at 1,800–2,340 m (median about 1,975 m); one weighted site sits at 3,289 m.

North CaucasusTranscaucasus

🔒 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 4.0 licence, unmodified.