Sempervivum arachnoideum: How to Grow and Care for Cobweb Houseleek

Sempervivum arachnoideum Cobweb Houseleek

Scientific name: Sempervivum arachnoideum

Common name: Cobweb Houseleek

It does well in cold climates, even buried under snow, and has pink edges. It is a monocarpic, but will have many chick before it dies.

Quick Look at Sempervivum arachnoideum

  • Full sun to partial sun
  • Typical water needs for a succulent
  • Plant grows up to 3″ (7.5 cm) tall
    Rosettes grow up to 4″ (10 cm) wide
  • Zone 5 (-20° F | -29° C)
  • Winter hardy
  • Propagation by offsets
  • Generally non-toxic to humans and animals
  • Winter Dormant

General Care for Sempervivum arachnoideum ‘Cebenese’

It is a cold-hardy plant with webbed rosettes. It works very well in vertical wall gardens.


The watering needs for a succulent is typical. The “soak and dry” method will allow the soil to dry out completely between waterings.

Where to Plant

It does best when planted outdoors. It does well in both full and partial sun. You can plant in an area of your garden that gets 6 hours of sunlight a day. It can be planted in rock walls, vertical gardens, and containers.

How to Propagate Sempervivum arachnoideum ‘Cebenese’

The arachnoideum can be easily spread from offsets. Each “hen” will produce a large number of “chicks”, which can be removed from the mother plant and potted or added to arrangements.


Small offsets will be produced by ‘Cebenese’. To remove the offsets from the main stem, use a sterile knife or scissors. Allow the offsets to dry for a couple of days before laying on the soil.

Practical uses

It is a great plant to use as part of a green roof.

Interesting history

“Cobweb Houseleek” was thought to keep witches away from your home.


  1. Sempervivum arachnoideum (Cobweb Houseleek) – Wikipedia

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