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Cobweb Houseleek
Scientific Name: Sempervivum arachnoideum L.
Family: Crassulaceae
Cobweb Houseleek (Sempervivum arachnoideum)
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Sempervivum arachnoideum 'Cebennense' at the Huntington Gardens in early July
Recommended Temperature Zone:
sunset: All zones
USDA: 7-11

Frost Tolerance: Hardy at least to 10F (-12C)

Heat Tolerance: Very questionable, avoid full sun in Phoenix in summer, should be probably kept inside behind a sunny window when the temperature exceeds 100F (-36C)

Sun Exposure: Shade in phoenix in summer

Origin: Europe

Growth Habits: Clumping rosettes forming mats up to 1 foot in diameter (30 cm); each rosette is small, with the leaves connected together by spriderweb-like fibers.

Watering Needs: Moderate water

Propagation: Offsets

Blooming Habits:
Blooms in summer. The rosette that bloomed then dies after setting seeds.

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