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Sempervivum arachnoideum subsp. tomentosum (Woolly cobweb houseleek)
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1 hour care
per year
per year
0.1m
Max height
Max height
0.3m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Sempervivum arachnoideum subsp. tomentosum
Other names
Woolly cobweb houseleek, Sempervivum arachnoideum 'Laggeri', Sempervivum webbianum
Genus
Sempervivum Sempervivum
Species
S. arachnoideum subsp. tomentosum - S. arachnoideum subsp. tomentosum is a mat-forming, evergreen perennial with rosettes of fleshy, obovate, mid-green to red leaves densely covered in cobweb-like, white hairs. Leafy stems bear flat clusters of star-shaped, pink flowers in summer.
Sempervivum arachnoideum subsp. tomentosum is: Evergreen
Habit
Creeping, Mat Forming
Flower
Pink in Summer
Foliage
Red, Mid-green, Flushed red, White, Reddish-green in All seasons
How to care
Watch out for
Specific pests
Slugs , Vine weevil Slugs , Vine weevil
Diseases
Generally disease-free
Rust Rust
General care
Propagation
Separate offsets in spring or early summer.
Propagation methods
Offsets, Seed
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Where to grow
Sempervivum arachnoideum subsp. tomentosum (Woolly cobweb houseleek) will reach a height of 0.1m and a spread of 0.3m after 2-5 years.
Suggested uses
Containers, Cottage/Informal, Garden edging, Gravel, Ground Cover, Low Maintenance, Rock
Cultivation
Plant in moderately fertile, well-drained soil in full sun. Dislikes wet winter conditions.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
North, South, East
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Sempervivum arachnoideum subsp. tomentosum
Other names
Woolly cobweb houseleek, Sempervivum arachnoideum 'Laggeri', Sempervivum webbianum
Genus
Sempervivum Sempervivum
Species
S. arachnoideum subsp. tomentosum - S. arachnoideum subsp. tomentosum is a mat-forming, evergreen perennial with rosettes of fleshy, obovate, mid-green to red leaves densely covered in cobweb-like, white hairs. Leafy stems bear flat clusters of star-shaped, pink flowers in summer.
Native to
Alps, Pyrenees
Foliage
Evergreen
Habit
Creeping, Mat Forming
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Colour
Flower
Pink in Summer
Foliage
Red, Mid-green, Flushed red, White, Reddish-green in All seasons
How to care
Watch out for
Specific pests
Diseases
Generally disease-free
Specific diseases
General care
Propagation
Separate offsets in spring or early summer.
Propagation methods
Offsets, Seed
Monthly care advice
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Where to grow
Sempervivum arachnoideum subsp. tomentosum (Woolly cobweb houseleek) will reach a height of 0.1m and a spread of 0.3m after 2-5 years.
Suggested uses
Containers, Cottage/Informal, Garden edging, Gravel, Ground Cover, Low Maintenance, Rock
Cultivation
Plant in moderately fertile, well-drained soil in full sun. Dislikes wet winter conditions.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
North, South, East
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 8, Zone 7, Zone 6, Zone 5
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | North, South, East | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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DISCUSS THIS PLANT
My plant is displaying signs of rot (brown dead leaves on the underside). However, I've taken it out of the soil and checked for damp roots and they were fairly dry. So i'm wondering what could be causing the rot. Any ideas?
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