How to Grow Cobweb Hens and Chicks
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Cobweb Hens and Chicks
Sempervivum arachnoideum
succulentCobweb Hens and Chicks is a low-growing, evergreen succulent forming dense rosettes with intricate white, web-like hairs covering the leaves. The 'hen' is the main rosette, while 'chicks' are the smaller offsets that cluster around it. This hardy alpine succulent produces delicate pink or red flowers on tall stems in summer.
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Example Cobweb Hens and Chicks timeline · Pittsburgh, PA (Zone 6b)
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Plant Cobweb Hens and Chicks
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Cobweb Hens and Chicks
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Hardy in zones 3-9; thrives in cooler climates with excellent drainage
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Establishment
2-4 weeksYoung rosettes or offsets are planted; leaves are thin and may lack full cobweb coverage
Keep soil barely moist the first 2-3 weeks; then reduce watering significantly. Avoid transplanting stress by planting in cooler months.
Vegetative Growth
Several months to 1-2 yearsRosettes expand, the characteristic silvery-white web-like filaments develop over leaves, creating a spider-web appearance; offset 'chicks' begin forming around the base
Water only when soil is completely dry. Remove any dead leaves. Ensure excellent air circulation to prevent rot. Full sun intensifies web markings.
Maturity
2-3 years onwardsMain rosette reaches full size (2-4 inches across); dense cluster of offset rosettes surrounds the mother plant; plant is sturdy and web patterns are prominent
Continue minimal watering. Mature rosettes are very drought-tolerant. Prepare to harvest offsets if desired. Expect flowering in the next season.
Flowering
4-6 weeks (typically summer)A thick flower stalk emerges from the center of a mature rosette, bearing 5-20 small star-shaped pink, red, or pale flowers
After flowering, the flowering rosette will die; this is normal. Leave offset rosettes intact. Do not fertilize during flowering.
Offset/Pup Production
Continuous throughout the plant's lifeAfter the main rosette flowers and dies, numerous healthy offset rosettes remain and mature to flowering size over 2-3 years
Harvest offsets by gently removing and replanting, or leave in place to create a dense colony. Thin if overcrowded.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Remove affected leaves; improve air circulation; avoid overhead watering. Treat with sulfur dust if severe.
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Prevent by using well-draining soil and minimal watering. If affected, repot into fresh dry soil immediately.
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Isolate affected plants; spray with 70% isopropyl alcohol or insecticidal soap. May require repeated applications.
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and
Handpick; use copper barriers around plantings; apply slug bait if necessary, though rare on these plants.
Uses
Alpine Rock Gardens & Xeriscaping
OrnamentalCobweb Hens and Chicks are signature plants for rock gardens, alpine troughs, and water-wise landscape designs. Their distinctive cobweb-covered rosettes add year-round visual interest and require minimal maintenance. [source]
Container & Succulent Gardens
OrnamentalThese rosettes are ideal for shallow pots, alpine troughs, and mixed succulent containers. Their compact size and colorful leaves make them popular in interior succulent displays and outdoor container combinations. [source]
Pollinator Support
WildlifeThe summer flowers attract bees and other pollinators, supporting local ecosystems. The dense rosette structure also provides shelter for beneficial insects. [source]
Low-Maintenance Groundcover
HouseholdOnce established, these succulents spread via offsets to form dense, weed-suppressing mats that require no fertilizer, pesticides, or regular watering, making them excellent for difficult sites. [source]
Living Arrangements & Gifts
CraftIndividual rosettes are popular for small living succulent arrangements, fairy gardens, and as unique, long-lasting gifts. They can survive weeks without water, making them ideal for sending. [source]
Harvest Tips
To propagate, gently pull offset rosettes away from the mother plant once they are ½ to 1 inch across (usually after 1-2 growing seasons). Allow the broken base to callus for 2-3 days before planting in dry succulent soil. Do not water for 1-2 weeks after potting. For leaf propagation (less reliable), detach individual leaves, allow to dry 1-2 weeks, then place on dry soil and keep warm and bright until roots and rosettes form (4-8 weeks).
Fun Facts
- 🌱 The cobweb-like hairs are composed of fine transparent filaments that help reflect excess sun and reduce water loss in their native alpine mountain habitats.
- 🌱 Unlike most succulents, Sempervivum arachnoideum is monocarpic, meaning the main rosette flowers once and then dies—but not before producing numerous offset rosettes that can live for many decades.
- 🌱 These plants are called 'hens and chicks' because the large central rosette resembles a hen sitting with her chicks (the smaller offsets) clustered around her. This common name dates back centuries in European gardening.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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