Sempervivum arachnoideum
Also known as: Cobweb houseleek
The cobweb houseleek: white hair 'cobwebs' stretch across each tiny rosette between the leaf tips. It belongs to the Sempervivum genus, comes from European Alps (Carppathians), stays around Rosettes 2–5 cm, mat-forming, and tolerates USDA 4–8; hardy to -25 °C. Individual plants vary, so treat this as a general guide rather than a guarantee.
Key facts
- Genus: Sempervivum
- Origin: European Alps (Carppathians)
- Mature size: Rosettes 2–5 cm, mat-forming
- Hardiness: USDA 4–8; hardy to -25 °C
- Toxicity: Non-toxic
Succulent at a glance
- Genus
- Sempervivum
- Origin
- European Alps (Carppathians)
- Mature size
- Rosettes 2–5 cm, mat-forming
- Growth habit
- Cobwebbed tiny rosettes
- Leaf colour
- Green-red rosettes threaded with white cobweb hairs
- Flower colour
- Pink-red
- Hardiness
- USDA 4–8; hardy to -25 °C
- Toxicity
- Non-toxic
- Other names
- Cobweb houseleek
About the Sempervivum arachnoideum
The cobweb houseleek: white hair 'cobwebs' stretch across each tiny rosette between the leaf tips. Alpine native; rock-garden gem. Loves sun and hates winter wet.
Care and cultivation
The hardiest succulents — outdoor year-round even in snow. Full sun, gritty soil, and let them dry between waterings. Each rosette flowers once then dies; the 'chicks' around it carry on. Light: Full sun. Water: Every 1–2 weeks in summer growth; dry in winter. Soil: Gritty mix; excellent in rock gardens.
Description
Sempervivum arachnoideum is a Sempervivum succulent from European Alps (Carppathians). The cobweb houseleek: white hair 'cobwebs' stretch across each tiny rosette between the leaf tips. Alpine native; rock-garden gem. Loves sun and hates winter wet.
Identification
Key identification features: Green-red rosettes threaded with white cobweb hairs leaves in a Cobwebbed tiny rosettes form, reaching Rosettes 2–5 cm, mat-forming. Also known as Cobweb houseleek. Nickname: 'Cobweb houseleek'. Nickname: 'Cobweb houseleek'.
Frequently asked questions
How often should I water Sempervivum arachnoideum?
Every 1–2 weeks in summer growth; dry in winter. Let the soil dry completely between waterings and reduce water in winter.
Is Sempervivum arachnoideum toxic to pets?
Non-toxic. Keep it out of reach of cats and dogs.
Related succulents
Succulent information on this page is based on the Wikipedia article on the Sempervivum arachnoideum, supplemented with additional research. Reviewed for accuracy.