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Haworthia mucronata (Glassrim Haworthia)


Scientific Name

Haworthia mucronata Haw.

Common Names

Glassrim Haworthia


Aloe mucronata, Haworthia altilinea var. mucronata, Haworthia altilinea f. mucronata

Scientific Classification

Family: Asphodelaceae
Subfamily: Asphodeloideae
Tribe: Aloeae
Genus: Haworthia


This species is native to South Africa. It is one of the most widely distributed Haworthias in the Little Karoo and also known from several localities in the Eastern Cape Province.


Haworthia mucronata is a small succulent that forms stemless rosettes of pale green or yellow-green leaves that take on a pinkish blush in bright light. The rosettes grow up to 4.8 inches (12 cm) in diameter, slowly offsetting to form clumps. Leaves are soft, pointed, at first erect, becoming ascending to spreading, incurved, up to 3.2 inches (8 cm) long, and up to 0.5 inches (1.3 cm) wide. They have longitudinal lines, and translucent margins and keel, both often lined with pronounced bristles. Flowers are white with grey-green keels, and appear in spring, spirally arranged on slender, up to 16 inches (40 cm) tall stem.

The specific epithet "mucronata" derives from a Latin word meaning "pointy" and refers to the leaf shape.

How to Grow and Care for Haworthia mucronata

Light: Although some species can grow in full, bright sun, most Haworthias live in more sheltered spots, and they are adapted to thrive in partial shade. Place the potted plants in a bright area with some protection from the hottest rays of the day.

Soil: All Haworthia species do not like their roots to remain wet for prolonged periods, so their potting soil should be well-drained. Use a commercial succulent soil or make your own well-draining potting mix.

Hardiness: Haworthia mucronata can withstand temperatures as low as 30 to 50 °F (-1.1 to 10 °C), USDA hardiness zones 10a to 11b.

Watering: These succulents are very tolerant of underwatering, but overwatering can quickly lead to rotting. From spring to fall, water thoroughly, then wait until the top of the soil dries out before watering again. During the winter rest period, water just enough to keep leaves from shriveling.

Fertilizing: Haworthias do not require much fertilizer. For optimum growth, fertilization is a good idea. Feed only with a dilute fertilizer and only during the active growing season.

Repotting: These succulents are generally slow-growing and can stay in the same pot for years. For best health, Haworthias should be repotted into fresh soil every two to three years.

Propagation: This species is not known to produce offsets, so propagation is by seeds or leaves.

Learn more at How to Grow and Care for Haworthia.

Toxicity of Haworthia mucronata

Haworthia species are generally non-toxic to humans and animals.


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