Sempervivum arachnoideum 'Cobweb': Cobwebbed Rosettes with Reddish-Pink Blooms

Sempervivum arachnoideum 'Cobweb'

One of the most distinctive sempervivums, Sempervivum arachnoideum 'Cobweb' forms tight rosettes covered in a fine network of white hairs that resemble cobwebs—hence the species name arachnoideum (spider-like). In early summer, attractive reddish-pink blooms appear on short stems. Perfect for rock gardens, containers, and desert plantings where unique texture is prized.

Cobweb Texture

The rosettes are 1–2 inches across, composed of small, pointed leaves. A dense mesh of fine, white trichomes (hairs) stretches between leaf tips, creating a complete cobweb covering. The effect is ethereal and tactile. The green leaves show through the web. Early summer brings 4–6 inch stems with clusters of reddish-pink, star-shaped flowers. Offsets form within the web.

Growing Conditions

• Light: Full sun. Best web formation in full sun.
• Height: Rosettes 1–2 inches; flowers to 6 inches (2 feet or less).
• Spread: 6–12 inches (colonizing).
• Soil: Very well-drained, gritty.
• Water: Low. Drought-tolerant.

Garden Uses

Fascinating in rock gardens, trough gardens, and containers where the cobweb texture can be admired up close. Excellent in fairy gardens and children's gardens. The web is most prominent in spring and early summer. Pair with smooth, dark succulents for extreme textural contrast. Very low maintenance.

Sempervivum arachnoideum 'Cobweb'—tight rosettes veiled in cobweb hairs with reddish-pink flowers for unique texture in succulent gardens.