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Sempervivum arachnoideum

Houseleek

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Sempervivum arachnoideum
  • Common name: Houseleek
  • Family: Crassulaceae
  • Plant Type: Alpine, Cactus or succulent, Perennial
Flower colour:

Pink

Foliage colour:

Green

Sempervivums, sometimes called houseleeks or hens-and-chicks, are hardy, succulent plants that grow in the wild between rocks in mountainous regions. They look wonderful when grown in containers, in rock gardens, and in dry stone walls and cracks in paving, especially alongside low evergreen plants such as sedums. Although they look outstanding in winter when there’s little else of interest in the garden, sempervivums also look great in summer, when, tall, conical spikes of greenish pink flowers emerge from the centre of mature plants.

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Often called the cobweb houseleek, Sempervivum arachnoideum is a dramatic-looking plant, bearing pale green rosettes covered with fine webbing, reminiscent of cobwebs. Small pink flowers are borne in early summer.

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For best results, grow Sempervivum arachnoideum in full sun in well-drained soil, preferably in containers with added horticultural grit to aid drainage. Sempervivums don’t need feeding, but do benefit from being repotted each year into compost containing slow-release fertiliser. Propagate new plants by gently teasing out the small baby rosettes (chicks) which appear around the main plant (hen), and transplant to a new location.

How to grow Sempervivum arachnoideum

  • Plant size

    10cm height

    30cm spread

  • Aspect

    South facing, west facing

  • Sun exposure: Full sun
  • Hardiness: Hardy
  • Soil type: Well drained / light / sandy

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do Plant in July

Do Plant in August

Do Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does not flower in May

Plant does flower in June

Plant does flower in July

Plant does flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Divide
Divide

Do not Divide in January

Do not Divide in February

Do not Divide in March

Do not Divide in April

Do Divide in May

Do Divide in June

Do Divide in July

Do Divide in August

Do Divide in September

Do not Divide in October

Do not Divide in November

Do not Divide in December

Sempervivum arachnoideum and wildlife

Sempervivum arachnoideum has no particular known value to wildlife in the UK.

Is Sempervivum arachnoideum poisonous?

Sempervivum arachnoideum has no toxic effects reported.

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Cats

No reported toxicity to Dogs

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People

Plants that go well with Sempervivum arachnoideum