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Haworthia cuspidata (Star Window Plant)

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Scientific Name

Haworthia cuspidata Haw.

Accepted Scientific Name

Haworthia cymbiformis (Haw.) Duval

Common Names

Star Window Plant

Synonyms

Catevala cuspidata, Haworthia x cuspidata, Haworthia cymbiformis x retusa

Scientific Classification

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

Origin

The authenticity and origin of this succulent are debated by botanists. Lately was synonymized with Haworthia cymbiformis var. cymbiformis, but some botanists argue that it is an old hybrid between Haworthia cymbiformis and Haworthia retusa.

Description

Haworthia cuspidata, also known as Haworthia x cuspidata, is a small succulent that forms rosettes of bright green leaves marked with darker green translucent areas near the apex. The individual rosettes grow up to 4 inches (10 cm) in diameter and offset freely to form a dense clump. Leaves are fleshy, thick, and pointed at the tips. They are shorter and thicker than those of Haworthia cymbiformis. Flowers are white with brownish-green veins and appear in summer on a slender, up to 8 inches (20 cm) tall inflorescence.

The specific epithet "cuspidata" derives from the Latin "cuspidatus," meaning "pointed" and refers to the pointed leaf apex.

Photo by Tina

How to Grow and Care for Haworthia cuspidata

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 cuspidata 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: Vegetative propagation, especially by offsets, is the quickest and most common method of propagating Haworthias. They can also be propagated by leaves and seeds.

Learn more at How to Grow and Care for Haworthia.

Toxicity of Haworthia cuspidata

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

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