Scientific Name
Haworthia arachnoidea (L.) Duval
Common Name(s)
Cobweb Aloe
Synonym(s)
Aloe arachnoidea, Aloe arachnoides, Aloe pumila var. arachnoidea, Apicra arachnoidea, Catevala arachnoidea
Scientific Classification
Family: Asphodelaceae
Subfamily: Asphodeloideae
Tribe: Aloeae
Genus: Haworthia
Etymology
The specific epithet "arachnoidea" (pronounced "a-rak-NOY-dee-a") means "spider web-like, cobwebby" and refers to the long, translucent spines on the leaves of this species, which give the rosettes a cobwebby appearance.
Origin
Haworthia arachnoidea is native to South Africa. It grows on rocky slopes and under bushes in the Breede River valley near Worcester and Robertson in the Western Cape province.
Description
Haworthia arachnoidea is a small succulent that forms rosettes of dark green, triangular leaves with margins and keels lined with long, translucent spines, and a terminal bristle that often becomes blackish. The rosettes typically grow solitary or may slowly offset, creating a small clump as they age. They can reach a diameter of 7.2 inches (18 cm). The leaves lack translucent areas and often dry grey‑white to brownish at the tips, forming a protective cover.
The white flowers appear from fall to spring on slender stalks that can reach 12 inches (30 cm) in length.
Haworthia arachnoidea is sometimes confused with its relative, Haworthia decipiens.
Varieties of Haworthia arachnoidea
- Haworthia arachnoidea var. arachnoidea
- Haworthia arachnoidea var. aranea
- Haworthia arachnoidea var. calitzdorpensis
- Haworthia arachnoidea var. namaquensis
- Haworthia arachnoidea var. nigricans
- Haworthia arachnoidea var. scabrispina
- Haworthia arachnoidea var. setata
How to Grow and Care for Haworthia arachnoidea
Hardiness: USDA hardiness zones 10a to 11b: from 30°F (-1.1°C) to 50°F (10°C).
Haworthias are one of the easiest succulents to care for, which makes them popular houseplants. They are great plants for beginners.
Although some species can grow in full, bright sun, most Haworthias live in more sheltered spots and are adapted to thrive in partial shade. In their habitat, they tend to grow under bushes and rock overhangs. This adaptation makes them well-suited to low-light conditions in homes and offices.
All Haworthia species don't tolerate wet roots for prolonged periods, so their potting soil should be well-drained. In their habitat, they grow in sandy soils and rocky areas. Use a commercial succulent soil or make your own well-draining soil mix.
These succulents tolerate underwatering, but overwatering can cause them to rot. From spring to fall, water the soil thoroughly, then wait until the soil surface dries before watering again. During the winter rest period, water them just enough to keep leaves from shriveling. If you use saucers, empty any standing water promptly.
Learn more at How to Grow and Care for Haworthia.
Links
- Back to genus Haworthia
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
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