Sempervivum marmoreum

A hardy houseleek from rocky outcrops in the Balkans, Carpathians and Pannonian hills, usually on sunny, south-facing rock. It needs full sun, sharp drainage and a real cold winter. Grown warm and dim it loses its colour and stretches.

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

Grows in open rocky outcrops, cliffs and stony grassland, usually facing south. It roots into crevices and thin mineral soil.

Recorded from 600 to 2,220 m (only 7 records carry an elevation). Hungarian and Slovak populations grow on lower hills.

RomaniaHungaryBulgariaGreeceAlbaniaUkraineSlovakiaNW BalkansItaly

🔒 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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More Sempervivum

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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 3.0 licence, unmodified.