vivum

Vivum is a term commonly used in horticulture to refer to a group of perennial succulent plants known as hens-and-chicks or houseleeks. In modern taxonomy, the cultivated forms are primarily associated with the genus Sempervivum in the Crassulaceae family, which includes many species and cultivars.

These plants form compact rosettes of thick, fleshy leaves that are typically evergreen. Leaf color ranges from green to red or purple, often with attractive edging or markings. Each rosette produces numerous offsets, or "chicks," around a central rosette稱 the "hen." Flowering occurs on tall stalks with small, star-shaped flowers; after flowering, the original rosette usually dies, while the offsets continue the clump.

Habitat and cultivation: Vivums are native to Europe and parts of Asia, especially alpine regions. They are cold-hardy and drought-tolerant, preferring full sun and well-drained soil. They tolerate poor soils and are well suited to rock gardens, walls, and containers. Overwatering should be avoided, particularly in winter, to prevent rot.

Propagation and care: Propagation is typically done via offsets or, less commonly, leaf cuttings. Seed can be used for breeding but is less practical for routine cultivation. They are generally pest-resistant but can be affected by aphids or mealybugs, and rot can occur with excessive moisture.

Notable species include Sempervivum tectorum (common houseleek) and Sempervivum arachnoideum (spider houseleek). The name vivum derives from Latin sempervivum, meaning “always living,” a reference to the plant’s hardiness.