Sempervivum ‘Onyx’ is a strikingly dark, large-rosetted hen-and-chicks succulent prized for its glossy, near-black foliage and refined architectural form. A member of the Crassulaceae family, this hardy alpine plant originates from the mountainous regions of Europe, where it evolved to thrive in rocky, free-draining soils and intense sunlight. Its bold, sculptural rosettes can grow up to 20 cm across, forming dense clusters of offsets (“chicks”) that gradually carpet the soil surface with rich, jewel-toned foliage.
Each rosette is composed of thick, triangular leaves in shades of deep plum, mahogany, and blackish-purple that appear almost metallic under bright light. Cooler temperatures or strong sun intensify its pigmentation, producing dramatic colour contrast in the garden year-round. As the plant matures, the leaf edges may curl slightly inward, adding extra depth and texture to its symmetrical form.
In late spring to summer, mature rosettes may send up a short flowering stem bearing star-shaped blooms in soft pink to crimson tones — a charming contrast to the dark foliage. After flowering, that rosette dies back naturally, leaving its offsets to continue the colony’s growth cycle.
Sempervivum ‘Onyx’ prefers full sun to light shade and thrives in gritty, well-drained soil with minimal organic matter. It is exceptionally drought-tolerant once established and endures both cold frosts and summer heat, making it well-suited to Australian conditions. Ideal for rockeries, containers, green roofs, or borders, it pairs beautifully with silver or lime-green succulents for contrast.
Low-maintenance yet visually dramatic, Sempervivum ‘Onyx’ is perfect for gardeners seeking structure, resilience, and enduring colour in all seasons — a plant that quietly commands attention without demanding effort.
Sempervivum 'Onyx' plants for sale shown in 70mm pot. You will receive same or similar plants as those shown in images. Colours will vary depending on time of year and growing conditions.
First time customers... Please read our Shipping Guide, in top or bottom menu, before placing your order.
Please Note:
- All plants are sent bare rooted with no pots and soil, or minimum soil only.
- Due to the drying process necessary for sending plants through the mail, plants may look slightly different than images shown on our website
- Some plants, may look wrinkled when they arrive, may be somewhat limp, or soft to the touch. This is normal as they have been dried out for for a number of days before shipping to avoid rotting in the mail.
- Succulents are very hardy plants and they will recover quickly, providing you unpack them as soon as you receive them follow some simple care instructions you will find with your order.
If you have any questions or concerns at all, please message us via our Facebook page at John & Norma's Succulents for the fastest Response.