Sempervivum 'Red Rubin' 10.5cm Care & Tips
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Ruby colour, premium attitude, basic care 👌
Family: Crassulaceae • Pot diameter: 10.5 cm • Height: 15–20 cm
Sempervivum 'Red Rubin' delivers a premium look with disciplined, symmetrical rosettes and a deep ruby-to-burgundy tone that shows its best colours in very strong light. Growth stays compact and clean, and over time it produces offsets (offsets) that fill the pot for a richer, fuller display. Ideal for balcony, patio, or a bright windowsill when you want bold colour, toughness, and low-effort care.
Place it in a very bright spot or full sun, ideally outdoors (balcony/patio). The more light it receives, the tighter the rosette stays and the more “ruby” the colour becomes. If moving from shade to strong sun, acclimate gradually to avoid scorch.
Role in a composition: the “red accent” that draws the eye and adds depth.
What it is (cultivar): Sempervivum is a Crassulaceae genus with a very large number of cultivars (cultivars), selected for colour, rosette density, and seasonal “flush” into burgundy tones.
Records for ‘Red Rubin’: In collector/cultivar registers, ‘Red Rubin’ is commonly attributed to Goos & Koenemann (Germany) and is often listed with a year of 1937. In the same registers, parentage is frequently given as Sempervivum tectorum × Sempervivum marmoreum, which fits the tight rosette habit and the stable tendency toward ruby/burgundy colour.
Accuracy note: While the above details are repeated across specialist registers and long-standing listings, the original primary breeder note is not always easily accessible in a single, definitive publication. For that reason, we keep the wording as “recorded in registers” and avoid stronger claims beyond what is consistently documented.
Naming (etymology): The name Sempervivum comes from Latin “semper” (always) + “vivum” (alive), reflecting the genus’ toughness. ‘Red Rubin’ points to the plant’s ruby-toned foliage.
Ecology & biology (why it holds up): Many Sempervivum originate from rocky, often mountainous habitats with excellent drainage, intense light, and big temperature swings. Red tones are supported by pigments (anthocyanins) that act in photoprotection (photoprotection) under strong light and cold, which is why colour often deepens in cooler periods.
Propagation & stability: The cultivar is maintained through clonal propagation (clonal propagation) via offsets (offsets). Offsets root easily in a fast-draining mix and keep the cultivar traits stable.
| 🔎 Detail | Info |
|---|---|
| 🌿 Botanical name | Sempervivum 'Red Rubin' |
| 🏷️ Family | Crassulaceae |
| 🪴 Pot / size | 10.5 cm • height 15–20 cm |
| ☀️ Light | Very bright / sun • for deeper red colour. |
| 💧 Watering | Sparse • only on a completely dry substrate. |
| 🪨 Substrate | Very free-draining succulent mix. |
| 🧷 Feature | Produces offsets (offsets) and forms a clump. |
| 🐾 Toxicity | Generally considered non-toxic. Still best kept out of reach from chewing, as rosettes bruise easily. |
Give it very strong light (sun where possible) and water sparingly. In shade and with frequent watering, colour lightens and the rosette loosens.
Sparingly. Water only when the substrate has dried completely throughout. In winter, even less.
Yes, often. Leave them to fill the pot, or gently separate and root them in a fast-draining mix.
It’s generally considered non-toxic. Still, it’s best not to let pets chew it—rosettes bruise easily and the plant loses its clean look.
© Original plant description by Greenleaf Garden Center. All rights reserved. | Το κείμενο αποτελεί πρωτότυπο υλικό. Απαγορεύεται η αντιγραφή (Νόμος 2121/1993).
🔎 Note: Due to natural variation, the plant you receive may differ slightly from the photos. Shape, size and colour can vary with season, growing conditions and the plant’s nature.