#87 Cobweb Sempervivum Arachnoideum
SKU: EXACT 2in- #87, Sempervivum Cobweb
The Succulent Source · Plant notes
Meet Cobweb Hens & Chicks.
Compact rosettes are connected by fine white, cobweb-like hairs, giving Sempervivum arachnoideum its distinctive appearance.
- LightOutdoor sun, introduced gradually
- WaterWater when dry; avoid winter wet
- SoilAiry, free-draining mix and drainage holes
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Cold hardinessHardy succulent
Cold hardy; drainage matters
A closer look
What makes it different.
The webbing is a normal plant feature, not automatically a pest. This hardy species suits an outdoor container or rock-garden setting with plenty of light and excellent drainage.
The main rosette, or hen, produces smaller offsets, or chicks. A mature rosette flowers once and then dies, while healthy offsets carry on the colony. This normal life cycle does not mean every rosette in the pot dies together.
The everyday essentials
How to keep it happy.
01 Find the right light
Sempervivums are best grown outdoors with plenty of light and fresh air. Acclimate a greenhouse-grown starter gradually before giving it full sun. A warm, dim indoor shelf is unlikely to maintain a firm, compact rosette.
02 Water with the plant’s needs in mind
Water an establishing plant when the mix dries, letting excess drain away. Established outdoor plants often need little supplemental water. Do not water frozen soil, and protect containers from prolonged winter saturation.
03 Give the roots air and drainage
Use a free-draining cactus and succulent mix in a pot with drainage holes. If the mix stays wet too long, add a suitable mineral amendment such as pumice or perlite. Repot into a container only a little larger than the roots.
04 Adjust through the year
These are cold-hardy succulents with a natural seasonal cycle. Leave established plants in an appropriate outdoor position with sharp drainage. Small exposed pots need more protection from extreme conditions than plants rooted in the ground.
Start here
The first few days at home.
Unpack promptly and gently clear away loose packing material. Begin in bright, protected light while the plant adjusts after shipping. Check the mix before adding water, and introduce stronger sun gradually.
Give the roots time to settle in the nursery pot before choosing a permanent container. Small cosmetic marks can occur on living plants. If something concerns you on arrival, take clear photos and contact us for help.
Know what you’re seeing
Pests & common growing questions.
Stretching or losing its shape?
Long gaps between leaves, a widening rosette, or pale new growth can indicate insufficient light. Improve light gradually. Old stretched growth will not compact again, so judge the response in new growth.
Soft tissue and damp soil?
Soft, yellowing leaves or a darkening stem can signal excess moisture and possible rot. Stop adding water, check drainage, and inspect the roots. Shrivelling can also occur when damaged roots cannot take up water.
Cottony clumps in leaf joints?
Inspect for mealybugs and separate an affected plant from others. Cottony clusters differ from normal hairs, waxy coatings, or raised leaf markings. Identify the pest before choosing a treatment and follow its label.
A mark on an older leaf?
A few dry older leaves or minor surface marks can be normal. Progressive tissue collapse, a darkening stem, or repeated unexplained leaf loss deserves a closer look. Check moisture, light, roots, and pests together.
A few useful answers
Before you choose your spot.
Can I leave it outside in winter?
Sempervivums are generally cold hardy and suited to outdoor growing. Choose a locally suitable position, keep drainage sharp, and protect very small or exposed pots from extreme cold and persistent winter wet. A warm indoor room is not usually their best winter home.
How can I grow more?
Separate offsets once they are large enough and have developed roots. Set them into a gritty, well-draining mix with the rosette above the soil surface. Spring is a useful time to fill gaps or establish a new cluster.
Will I receive the exact plant in the photo?
You receive this listing’s nursery type, not the exact individual photographed. Photos show representative plants. These are juvenile specimens, so color, size, shape, and the number of rooted plants can vary. Please check the ordering details below.
A few ordering details.
You receive a young plant of this listing’s nursery type in a basic plastic container, usually black or orange, approximately 2 inches wide across the top and 2 inches tall. The measurement refers to the pot, not a guaranteed plant width. Size, color, and form vary through the year.
Depending on the variety and how it grows, a pot may contain one or several smaller rooted plants; the number is not fixed. We select healthy plants from the stock available when your order is packed.
Delayed shipping is not available for these specific types because our nursery stock changes frequently. Please review our shipping information before ordering.
Plant care references
RHS: growing Sempervivum · Iowa State Extension: indoor succulent care · Iowa State Extension: succulent troubleshooting. Nursery names and representative photos come from this listing. Adjust care to your own growing conditions.
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