Sempervivum arachnoideum subsp. tomentosum (C.B. Lehm. & Schnittsp.) Schinz & Thell.
woolly cobweb houseleek
S. arachnoideum subsp. tomentosum is a mat-forming evergreen perennial with fleshy rosettes to 4cm in width, densely covered with cobwebby white hairs. Starry pink flowers 1.5cm in width are borne in flat cymes on stems to 15cm
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Size
Ultimate height
Up to 10cmTime 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 White | |||
|---|---|---|---|---|
| Summer | Pink | Green Red White | ||
| Autumn | Green Red White | |||
| Winter | Green Red White |
Position
- Full sun
Aspect
North–facing or South–facing or East–facing
Exposure
Sheltered Hardiness
H7Botanical details
- Family
- Crassulaceae
- Native to the UK
- 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
- Plant range
- Alps, Pyrenees
How to grow
Cultivation
Grow in moderately fertile, humus-rich, moist but well-drained soil in full sun
Propagation
Propagate by offsets
Suggested planting locations and garden types
- Coastal
- Gravel garden
- Patio and container plants
- Wildlife gardens
- City and courtyard gardens
- Cottage and informal garden
- Rock garden
- Flower borders and beds
- Garden edging
Pruning
No pruning required
Pests
May be susceptible to slugs
Diseases
Generally disease-free
Get involved
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