Species · genus Sempervivum · Crassulaceae
Limestone Houseleek
Sempervivum calcareum Jord.
Cultivars of S. calcareum
The named forms growers keep — each with its own page, each honest about how much we know.
No named cultivars catalogued under S. calcareum yet. When growers document a stable, named form, it earns its own page here.
Guide
The species-level account. Cultivar pages build on this and say where they differ.
A hardy alpine succulent from the rocky slopes of France and Italy, forming tight rosettes that store water in their fleshy leaves. It wants gritty, fast-draining mix, bright light with some direct sun, and infrequent deep watering — let the soil dry out completely, then water only when the mix is dry several inches down. It tolerates dry air and cool conditions, and rots quickly if kept wet.
Care recipe
The species record — the baseline every cultivar inherits unless it says otherwise.
Care notes are early — not yet verified
- Light
- ai:claude-opus-4-8
- Water
- ai:claude-opus-4-8 (range 10-21d)
- Humidity
- ai:claude-opus-4-8
- Soil
- ai:claude-fable-5
- Care
- ai:claude-fable-5
Direct sun
≈ every 21 days
Low — average room
5–24 °C
Gritty, sharp-draining cactus and succulent mix
Detach and replant the offset rosettes
Weak dilute feed once or twice in spring and summer only
Slow
Mature rosettes flower once then die, leaving offsets behind
Not yet documented
This is where toxicity lives — every cultivar of this species inherits it and none can override it.
Reference images
Every image credited. Licenses link to their deeds.
No reference gallery yet
A few clear photos — habit, a mature leaf, a flower if it blooms — would give this page its eyes.
Add imagesSources: ai:claude-opus-4-8 · ai:claude-opus-4-8 (range 10-21d) · ai:claude-fable-5
Kept true by its growers
Every fact here carries its source. Grow Limestone Houseleek yourself? What you’ve observed — how it drinks, how it holds its color, a name that’s off — is exactly what keeps this page honest. Contributions are reviewed before anything changes.
Sign in to add what you know →