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Sempervivum Cobweb

Sempervivum arachnoideum

succulent

verifiedReviewed by the GreenScout Team

A distinctive hen-and-chicks succulent featuring tight rosettes covered with silvery-white hair-like structures that resemble cobwebs, giving the plant its common name. The rosettes turn reddish-pink in full sun and produce tall spikes of pink flowers in summer before the flowering rosette dies. Extremely hardy and drought-tolerant, it thrives in rocky, poor soil conditions.

Common Problems

Select the problem your Sempervivum Cobweb is experiencing to get a treatment guide.

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Overwateringchevron_right

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Root Rotchevron_right

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Mushy Stemschevron_right

Care Guide

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Light

Full sun; requires 6+ hours of direct sunlight daily for best color and characteristic cobweb appearance

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Water

Water sparingly during active growth; keep nearly dry in winter; avoid wetting the rosettes

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Soil

Very well-draining rocky or sandy soil; use succulent mix with added perlite and small gravel

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Fertiliser

Minimal fertilizer needed; apply light succulent feed once in spring only

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Temperature

Hardy in USDA zones 3–8; tolerates temperatures to -30°F (-34°C)

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Humidity

Very low humidity; excellent air circulation essential to prevent fungal issues

Toxicity

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Non-toxic; completely safe for all household members and pets

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Frequently Asked Questions

Why does my Sempervivum Cobweb have white webbing on it?

Its rosettes are naturally covered with silvery-white hair-like structures that resemble cobwebs, which is exactly where this hen-and-chicks succulent gets its common name.

Why did one of my Sempervivum Cobweb rosettes die after flowering?

That's expected — individual rosettes produce tall spikes of pink flowers in summer and then die afterward, while the surrounding offsets continue growing to replace them.