Please donate to support our ‘Plants to Save the Planet’ Project. The Project is directed at enabling designers of ‘carbon farms’ and ‘food forests’: agroecosystems of perennial plants, to choose the most appropriate plants for their requirements and site conditions. We are working on a subset of plants in the PFAF database identified as having the most potential for inclusion in such designs. We are adding search terms and icons to those plants pages, and providing a range of search options aligned to categories of plants and crop yields, with Help facilities including videos. More >>>

Follow Us:

 

Sempervivum arachnoideum - L.

Common Name Cobweb Houseleek
Family Crassulaceae
USDA hardiness 4-8
Known Hazards None known
Habitats Amongst rocks and stones in the cooler regions of Europe, usually on siliceous soils[7].
Range Europe.
Edibility Rating    (0 of 5)
Other Uses    (0 of 5)
Weed Potential No
Medicinal Rating    (2 of 5)
Care
Fully Hardy Well drained soil Moist Soil Full sun
Sempervivum arachnoideum Cobweb Houseleek


www.fotopedia.com/items/flickr-559015922
Sempervivum arachnoideum Cobweb Houseleek
fr.fotopedia.com/items/flickr-3222416238

 

Translate this page:

Summary


Physical Characteristics

 icon of manicon of flower
Sempervivum arachnoideum is an evergreen Perennial growing to 0.1 m (0ft 4in) by 0.2 m (0ft 8in).
It is hardy to zone (UK) 5 and is not frost tender. It is in leaf all year, in flower in July, and the seeds ripen in August. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy) and medium (loamy) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils and can grow in very acid soils.
It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

UK Hardiness Map US Hardiness Map

Synonyms

Habitats

 Cultivated Beds; East Wall. In. South Wall. In. West Wall. In.

Edible Uses

None known

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.
Emollient  Haemostatic  Odontalgic  Ophthalmic  Sedative  Skin

The leaves are emollient, haemostatic, ophthalmic and sedative[7]. The crushed plant, or its juice, is applied externally to boils, wounds etc and is also used to stop nose bleeds[7]. The slightly warmed juice has been used to relieve ear inflammations and toothaches can be relieved by chewing on the leaves[7]. When macerated and infused in vinegar, the plant can be used to get rid of warts and corns[7]. The leaves are harvested in the summer and are best used when fresh since they are difficult to dry properly[7]. The leaf pulp is used to make a cooling face mask for reddened or sunburnt skin[7].

Our new book Edible Shrubs is now available.

Edible Shrubs provides detailed information, attractively presented, on over 70 shrub species. They have been selected to provide a mix of different plant sizes and growing conditions. Most provide delicious and nutritious fruit, but many also have edible leaves, seeds, flowers, stems or roots, or they yield edible or useful oil.

Read More

Edible Shrubs Book

Other Uses

None known

Cultivation details

Prefers a well-drained gritty soil in full sun[200]. Succeeds in any sandy soil, doing well in very little soil in rock crevices, walls, paths etc so long as there is sufficient humus[1, 200]. Prefers growing on acid rocks, though it also succeeds on calcareous ones[219]. Established plants are drought tolerant[200]. Strongly dislikes winter wet[200]. Plants are not very tolerant of weed competition[K]. Polymorphic, this species is split into a number of sub-species by some botanists[200]. Individual rosettes die after flowering, but produce a number of offsets that continue to grow[188]. Hybridizes with a number of other members of this genus[200].

Temperature Converter

Type a value in the Celsius field to convert the value to Fahrenheit:

Fahrenheit:

image

The PFAF Bookshop

Plants For A Future have a number of books available in paperback and digital form. Book titles include Edible Plants, Edible Perennials, Edible Trees, and Woodland Gardening. Our new book to be released soon is Edible Shrubs.

Shop Now

Propagation

Seed - surface sow in early spring in a cold frame. It usually germinates in 2 - 6 weeks at 10°c. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse for their first winter. Plant them out into their permanent positions in the summer if they have made sufficient growth, otherwise grow them on for a further year in pots before planting them out[K]. Division of offsets in spring or early summer. Larger divisions can be planted out direct into their permanent positions. We have found it best to pot up the smaller divisions and grow them on in a lightly shaded position in a cold frame, planting them out once they are well established in the summer. Plants can also be divided in September but these divisions should be overwintered in a greenhouse. Stem cuttings.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Sempervivum caucasicum 10
Sempervivum tectorumHouseleek, Common houseleek, Hen and Chickens23

 

Print Friendly and PDF

Expert comment

Author

L.

Botanical References

200

Links / References

For a list of references used on this page please go here

Readers comment

QR Code

What's this?

This is a QR code (short for Quick Response) which gives fast-track access to our website pages. QR Codes are barcodes that can be read by mobile phone (smartphone) cameras. This QR Code is unique to this page. All plant pages have their own unique code. For more information about QR Codes click here.

1. Copy and print the QR code to a plant label, poster, book, website, magazines, newspaper etc and even t-shirts.

2. Smartphone users scan the QR Code which automatically takes them to the webpage the QR Code came from.

3. Smartphone users quickly have information on a plant directly for the pfaf.org website on their phone.

Add a comment

If you have important information about this plant that may help other users please add a comment or link below. Only comments or links that are felt to be directly relevant to a plant will be included. If you think a comment/link or information contained on this page is inaccurate or misleading we would welcome your feedback at admin@pfaf.org. If you have questions about a plant please use the Forum on this website as we do not have the resources to answer questions ourselves.

* Please note: the comments by website users are not necessarily those held by PFAF and may give misleading or inaccurate information.

To leave a comment please Register or login here All comments need to be approved so will not appear immediately.

Subject : Sempervivum arachnoideum  
All the information contained in these pages is Copyright (C) Plants For A Future, 1996-2012.
Plants For A Future is a charitable company limited by guarantee, registered in England and Wales. Charity No. 1057719, Company No. 3204567,
Web Design & Management
This work is licensed under a Creative Commons License. Some information cannot be used for commercial reasons or be modified (but some can). Please view the copyright link for more information.