Sempervivum calcareum 'Sir William Lawrence'
houseleek 'Sir William Lawrence'
'Sir William Lawrence' is a mat-forming, evergreen, succulent perennial forming rosettes of fleshy, ovate, and pointed grey-green leaves tipped with maroon red, each rosette around 2cm in diameter. Clusters of sticky, pale green flowers flushed with purple are borne on short stems in summer
Size
Ultimate height
Up to 10cmTime to ultimate height
5–10 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Red Green Grey Silver | |||
|---|---|---|---|---|
| Summer | Green Purple | Red Green Grey Silver | ||
| Autumn | Red Green Grey Silver | |||
| Winter | Red Green Grey Silver |
Position
- Full sun
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H5Botanical 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
Accepted
How to grow
Cultivation
Grow in moderately fertile 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
- Patio and container plants
- City and courtyard gardens
- Coastal
- Cottage and informal garden
- Gravel garden
- Rock garden
- Garden edging
Pruning
Carefully remove spent rosettes after flowering
Pests
May be damaged by sempervivum leaf miner, slugs and snails, and vine weevil larvae
Diseases
May be affected by a rust
Get involved
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