Overview
Sempervivum 'Crimson Webb' is a matforming, rosette-forming alpine rockery in the genus Sempervivum, part of the Crassulaceae family, with evergreen, fleshy, pointed leaves, green, grey, red foliage. Sempervivum 'Crimson Webb' grows best in full sun, and tolerates loam and sand soils and any pH. Its UK hardiness is rated H5. Suggested uses include rock garden, scree bed, wall crevice, trough and alpine house.
About
Sempervivum 'Crimson Webb' is a mat-forming cultivar of the Sempervivum genus, known for its evergreen, fleshy, pointed leaves that can exhibit shades of green, grey, and red. As a perennial succulent, it forms dense rosettes that persist year-round and thrives in full sun with very well-drained, gritty soil, tolerating poor and thin soils. Suitable for rock gardens, scree beds, wall crevices, troughs, and alpine houses, it is hardy to UK zone H5 and is extremely drought-tolerant once established. This cultivar produces star-shaped flowers in summer, adding seasonal interest throughout the year.
Growing conditions
Best soil and position for Sempervivum
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Well-drained
- Aspect
- South-facing, East-facing, West-facing, North-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H5
Plant details
Sempervivum 'Crimson Webb' size, habit and characteristics
- Plant type
- Alpine Rockery, Cactus Succulent
- Habit
- Matforming, Rosette-forming
- Foliage
- Evergreen, Fleshy, Pointed leaves, Green, Grey, Red
- Suggested uses
- Rock garden, Scree bed, Wall crevice, Trough, Alpine house
Care notes
Pruning and caring for Sempervivum 'Crimson Webb'
- Propagation
- Offsets in spring
- Pest resistance
- Vine weevil, Sempervivum leaf miner, Slugs, Snails
- Disease resistance
- Rust
Frequently asked questions
Where is the best place to plant Sempervivum 'Crimson Webb'?
Sempervivum 'Crimson Webb' prefers full sun. It suits exposed and sheltered positions.
What soil does Sempervivum 'Crimson Webb' need?
Sempervivum 'Crimson Webb' grows best in loam and sand soil. It is happy in soil of any pH. Aim for soil that stays well-drained.
Is Sempervivum 'Crimson Webb' hardy in the UK?
Sempervivum 'Crimson Webb' has an RHS hardiness rating of H5, meaning it is hardy in most of the UK, tolerating -15 to -10°C.
How do I propagate Sempervivum 'Crimson Webb'?
Offsets in spring.
More in the Sempervivum genus
- Sempervivum 'Black'
- Sempervivum arachnoideum 'Red Papaver'
- Sempervivum arachnoideum subsp. tomentosum 'Minor'
- Sempervivum borissovae
- Sempervivum calcareum 'Benz'
- Sempervivum marmoreum 'Brunneifolium'
- Sempervivum tectorum 'Red Flush'
- Sempervivum 'Bellotts Pourpre'