Sempervivum thompsonianum

A natural hybrid houseleek from the mountains of the north-western Balkans, named in 1940. Like other Balkan Sempervivum it is a frost-hardy rosette plant of sunny rock and scree. It does best outdoors in full sun with sharp drainage and a real cold winter.

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

No specific habitat data were found. Balkan Sempervivum grow in rock crevices, on scree and in thin stony grassland on mountain slopes, fully exposed to sun and wind.

No recorded elevations. The climate point is at about 570 m in Bosnia, but houseleeks of the region usually grow on mountains, often above 1,000 m, where it is cooler.

NW. Balkan Pen.

🔒 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.