trefle.io · Taken Jul 4, 2018 by Dieter Wagner (cc-by-sa)
Crassulaceae
Cobweb house-leek
Sempervivum arachnoideum
Also known as Spider web sempervivum, Cobweb hen and chicks, Cobweb stonecrop
Indoor Plants · Native Plants · Succulent · Sempervivum · Rock Garden · Alpine · Drought Tolerant · Hen And Chicks · Rosette · Container Plant · Low Maintenance · Cobweb
Cobweb house-leek is a delightful alpine succulent recognised by its rosettes covered in fine white cobweb-like threads, making it an eye-catching addition to rock gardens, troughs, or sunny windowsills. It thrives in well-drained to gritty soil and requires very little water, making it ideal for beginner gardeners or drought-prone situations. In summer it sends up attractive pink to red star-shaped flowers and readily produces offsets to form spreading mats.
Growing conditions
The details behind the basics
- Daily light
- 6 hours
- Watering
- Water sparingly; allow soil to dry out completely between waterings to prevent root rot · Every 14-21 days
- Maintenance
- Low
- Soil
- loam
- Soil pH
- 6–7.5
- Temperature
- -20°F to 90°F
- Cycle
- Perennial
- Propagation
- Seed, Division
Hardiness
USDA 4a-9b
Form & growth
Mature size and habit
- Mature height
- 12 in – 3 ft
- Spread
- 2 ft
- Spacing
- 6 in apart
- Growth rate
- Moderate
- Root depth
- Medium
- Flowers
- No
- Foliage
- Medium
Ecology & origin
Where it belongs and what it brings
- Native to
- Austria, Corse, France, Germany, Italy, Spain, Switzerland
- Attracts
- Bees, Butterflies
Sources: trefle
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