Sempervivum arachnoideum 'Robin'
- Description
- Sempervivum arachnoideum 'Robin' Care Guide
- FAQ/Common Issues
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Sempervivum arachnoideum 'Robin' is a frost hardy succulent in the Crassulaceae family, beloved by alpine plant enthusiasts worldwide. Native to the mountainous regions of Europe, including the Alps and Pyrenees, it evolved to thrive in rocky, exposed terrain with minimal soil. This tough little rosette succulent has earned a permanent place in gardens and collections for its extraordinary resilience and charm.
What makes Sempervivum arachnoideum 'Robin' instantly recognizable is the delicate webbing of white filaments that stretch across its rosette tips, earning it the common names cobweb houseleek and spiderweb succulent. The fleshy leaves form tight, symmetrical rosettes in shades of green often flushed with rose or red at the tips, with that signature cottony web creating a frosted, otherworldly effect. As a clustering grower, it spreads steadily by producing offsets, or "chicks," that radiate outward from the mother hen in a satisfying, carpet-like colony.
Sempervivum arachnoideum 'Robin' typically blooms in summer, sending up a stout flower stalk crowned with star-shaped pink to reddish flowers that attract pollinators to the garden. Like all Sempervivums, individual rosettes are monocarpic, meaning the blooming rosette dies after flowering, but the surrounding chicks quickly fill the gap. A drop in night temperatures can help trigger blooming, making seasonal outdoor placement a great way to encourage flowering.
Sempervivum arachnoideum 'Robin' is an ideal choice for rock gardens, alpine troughs, container arrangements, green roofs, and balcony planters, handling wind and rain with ease. It thrives outdoors through autumn and is genuinely frost tolerant, making it one of the most carefree drought tolerant succulents you can grow. This is also a pet friendly succulent, so no worries if curious cats or dogs take a sniff. It can survive a 10-day trip without a caretaker and tolerates the dry heated air of indoor spaces, making it as practical as it is beautiful.
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Sempervivum arachnoideum 'Robin' thrives in full sun to partial sun, needing at least 4-6 hours of direct light daily.
Water Sempervivum arachnoideum 'Robin' every 2-3 weeks in summer, reducing to once a month or less in winter.
Plant Sempervivum arachnoideum 'Robin' in a gritty, fast-draining succulent or cactus mix blended with extra perlite or coarse grit.
Sempervivum arachnoideum 'Robin' tolerates temperatures from -30°F (-34°C) up to around 90°F (32°C) with good airflow.
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Sempervivum arachnoideum 'Robin' is a steady, moderate spreader that rarely needs fertilizer, though a light spring feed can boost offsets.
Sempervivum arachnoideum 'Robin' is hardy in USDA Zones 4-9, tolerating frost well below 0°F (-18°C), making it suitable for a huge range of climates. Gardeners across Minnesota, Wisconsin, Michigan, Illinois, Iowa, Indiana, Ohio, Pennsylvania, New York, Vermont, New Hampshire, Maine, Massachusetts, Connecticut, Rhode Island, New Jersey, Delaware, Maryland, Virginia, West Virginia, North Carolina, Tennessee, Kentucky, Missouri, Kansas, Nebraska, South Dakota, North Dakota, Montana, Wyoming, Colorado, Utah, Idaho, Oregon, and Washington can all grow Sempervivum arachnoideum 'Robin' outdoors year-round with little to no winter protection.
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Q: Is Sempervivum arachnoideum 'Robin' pet friendly?
A: Yes, Sempervivum arachnoideum 'Robin' is pet friendly and is not considered toxic to cats or dogs.
Q: How much light does Sempervivum arachnoideum 'Robin' need?
A: Sempervivum arachnoideum 'Robin' grows best in full sun to partial sun, ideally receiving 4-6 or more hours of direct sunlight each day.
Q: How often should I water Sempervivum arachnoideum 'Robin'?
A: Water Sempervivum arachnoideum 'Robin' every 2-3 weeks during the growing season, and cut back to monthly or less in winter. It is a true drought tolerant succulent that prefers drying out completely between waterings.
Q: Is Sempervivum arachnoideum 'Robin' frost hardy?
A: Absolutely, Sempervivum arachnoideum 'Robin' is one of the hardiest succulents available, tolerating temperatures as low as -30°F (-34°C) in USDA Zones 4-9. It can stay outdoors through autumn and winter without any special protection in most climates.
Q: How does Sempervivum arachnoideum 'Robin' spread and propagate?
A: Sempervivum arachnoideum 'Robin' naturally propagates by producing small offsets, or chicks, around the base of the mother rosette. Simply detach a chick once it has its own roots and pot it up or plant it directly in the garden.
Q: How big does Sempervivum arachnoideum 'Robin' get?
A: Individual rosettes of Sempervivum arachnoideum 'Robin' typically reach about 1-2 inches (2.5-5 cm) in diameter, while a mature cluster can spread to fill a 6-12 inch (15-30 cm) area or wider over time.
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Description
- Description
- Sempervivum arachnoideum 'Robin' Care Guide
- FAQ/Common Issues
-
![]()
Sempervivum arachnoideum 'Robin' is a frost hardy succulent in the Crassulaceae family, beloved by alpine plant enthusiasts worldwide. Native to the mountainous regions of Europe, including the Alps and Pyrenees, it evolved to thrive in rocky, exposed terrain with minimal soil. This tough little rosette succulent has earned a permanent place in gardens and collections for its extraordinary resilience and charm.
What makes Sempervivum arachnoideum 'Robin' instantly recognizable is the delicate webbing of white filaments that stretch across its rosette tips, earning it the common names cobweb houseleek and spiderweb succulent. The fleshy leaves form tight, symmetrical rosettes in shades of green often flushed with rose or red at the tips, with that signature cottony web creating a frosted, otherworldly effect. As a clustering grower, it spreads steadily by producing offsets, or "chicks," that radiate outward from the mother hen in a satisfying, carpet-like colony.
Sempervivum arachnoideum 'Robin' typically blooms in summer, sending up a stout flower stalk crowned with star-shaped pink to reddish flowers that attract pollinators to the garden. Like all Sempervivums, individual rosettes are monocarpic, meaning the blooming rosette dies after flowering, but the surrounding chicks quickly fill the gap. A drop in night temperatures can help trigger blooming, making seasonal outdoor placement a great way to encourage flowering.
Sempervivum arachnoideum 'Robin' is an ideal choice for rock gardens, alpine troughs, container arrangements, green roofs, and balcony planters, handling wind and rain with ease. It thrives outdoors through autumn and is genuinely frost tolerant, making it one of the most carefree drought tolerant succulents you can grow. This is also a pet friendly succulent, so no worries if curious cats or dogs take a sniff. It can survive a 10-day trip without a caretaker and tolerates the dry heated air of indoor spaces, making it as practical as it is beautiful.
-
Sempervivum arachnoideum 'Robin' thrives in full sun to partial sun, needing at least 4-6 hours of direct light daily.
Water Sempervivum arachnoideum 'Robin' every 2-3 weeks in summer, reducing to once a month or less in winter.
Plant Sempervivum arachnoideum 'Robin' in a gritty, fast-draining succulent or cactus mix blended with extra perlite or coarse grit.
Sempervivum arachnoideum 'Robin' tolerates temperatures from -30°F (-34°C) up to around 90°F (32°C) with good airflow.
![]()
Sempervivum arachnoideum 'Robin' is a steady, moderate spreader that rarely needs fertilizer, though a light spring feed can boost offsets.
Sempervivum arachnoideum 'Robin' is hardy in USDA Zones 4-9, tolerating frost well below 0°F (-18°C), making it suitable for a huge range of climates. Gardeners across Minnesota, Wisconsin, Michigan, Illinois, Iowa, Indiana, Ohio, Pennsylvania, New York, Vermont, New Hampshire, Maine, Massachusetts, Connecticut, Rhode Island, New Jersey, Delaware, Maryland, Virginia, West Virginia, North Carolina, Tennessee, Kentucky, Missouri, Kansas, Nebraska, South Dakota, North Dakota, Montana, Wyoming, Colorado, Utah, Idaho, Oregon, and Washington can all grow Sempervivum arachnoideum 'Robin' outdoors year-round with little to no winter protection.
-
Q: Is Sempervivum arachnoideum 'Robin' pet friendly?
A: Yes, Sempervivum arachnoideum 'Robin' is pet friendly and is not considered toxic to cats or dogs.
Q: How much light does Sempervivum arachnoideum 'Robin' need?
A: Sempervivum arachnoideum 'Robin' grows best in full sun to partial sun, ideally receiving 4-6 or more hours of direct sunlight each day.
Q: How often should I water Sempervivum arachnoideum 'Robin'?
A: Water Sempervivum arachnoideum 'Robin' every 2-3 weeks during the growing season, and cut back to monthly or less in winter. It is a true drought tolerant succulent that prefers drying out completely between waterings.
Q: Is Sempervivum arachnoideum 'Robin' frost hardy?
A: Absolutely, Sempervivum arachnoideum 'Robin' is one of the hardiest succulents available, tolerating temperatures as low as -30°F (-34°C) in USDA Zones 4-9. It can stay outdoors through autumn and winter without any special protection in most climates.
Q: How does Sempervivum arachnoideum 'Robin' spread and propagate?
A: Sempervivum arachnoideum 'Robin' naturally propagates by producing small offsets, or chicks, around the base of the mother rosette. Simply detach a chick once it has its own roots and pot it up or plant it directly in the garden.
Q: How big does Sempervivum arachnoideum 'Robin' get?
A: Individual rosettes of Sempervivum arachnoideum 'Robin' typically reach about 1-2 inches (2.5-5 cm) in diameter, while a mature cluster can spread to fill a 6-12 inch (15-30 cm) area or wider over time.
