Crassula rupestris aka Rosary Plant

Crassula rupestris belongs to the Crassulaceae family. It is a succulent that keeps its leaves year-round. Names include bead vine, necklace vine, and rosary vine. It comes from southern Africa, including the Cape region. LLIFLE gives its range as Vanrhynsdorp to the Fish River valley. It grows on rocky slopes, among boulders and low bushes. Kew calls it a succulent subshrub from a subtropical climate.

This small bush has many branches that spread out. Stems may stand up or lie along the ground. Garden plants reach about 1.5–1.6 feet [0.45–0.5 metres] tall. They can spread to 1.6 feet [0.5 metres]. Thick leaves grow in close pairs on round stems. Each pair joins at its base to form a bead-like chain. Some leaves are egg-shaped; others are narrow and pointed. They come in grey-green, brown-red, purple, and pinkish tones. Red or yellow leaf edges add contrast. Older leaves can drop from the stems. The RHS gives five to ten years for full growth.

Small white or pink flowers grow in tight groups. The RHS says the blooms look like stars. Each is about a quarter-inch across. LLIFLE places flower heads at the branch tips. The RHS also notes groups in the leaf axils, where leaves meet stems. LLIFLE lists spring bloom and June to October bloom in habitat. These dates come from that source's account. They do not give a fixed bloom season for all indoor plants. The thick leaves and small flowers add beauty. The RHS suggests patio pots and other containers.

Grow it in cactus compost that drains well. The RHS accepts sandy or loamy soil across the pH range. Give it bright filtered light or full sun. Give it moderate water from spring through autumn, then water less. Feed plants as they grow, every two or three weeks. Use a balanced liquid fertiliser. The RHS rates its hardiness H2, so keep it safe from freezing. In Britain, the RHS favours growing it under glass. Choose a sheltered spot for summer display outdoors.

The RHS says it needs no routine pruning. Grow new plants from seed in early spring. You can also use stem or leaf cuttings. Take these in spring or early summer. Watch for mealybugs, aphids, and vine weevil. The RHS reports few disease problems. The supplied species evidence does not establish edible uses. Nor does it establish whether the plant is toxic.