Sempervivum arachnoideum subsp. tomentosum ambig.
woolly cobweb houseleek ambig.
An evergreen, mat-forming perennial with rosesttes of fleshy green leaves suffused with red and densely covered in white cobweb-like hairs. Short, upright stems bearing terminal clusters of pink flowers may appear in suumer
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green Red | |||
|---|---|---|---|---|
| Summer | Pink | Green Red | ||
| Autumn | Green Red | |||
| Winter | Green Red |
Position
- Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or ShelteredDrought resistance
Yes Hardiness
H7Botanical details
- Family
- Crassulaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Matforming
- Genus
Sempervivum are evergreen perennials forming mats of fleshy-leaved rosettes, often attractively coloured, with star-shaped pink or pale yellow flowers in summer
- Name status
Correct
How to grow
Cultivation
Grow in moderately fertile, very well-drained soil in full sun. Protect from excessive winter wet. Suitable for rock garden, scree bed, wall crevice, trough or alpine house
Propagation
Propagate by rooting offsets in spring
Suggested planting locations and garden types
- Gravel garden
- Patio and container plants
- Rock garden
- Low Maintenance
Pruning
Rosettes die after flowering and should be carefully removed
Pests
May be susceptible to vine weevil
Diseases
May be susceptible to a rust
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