Haworthia nigra – Black Haworthia

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Scientific Name
Haworthia nigra (Haw.) Baker
Common Names
Black Haworthia
Haworthia nigra var. nigra, Aloe nigra, Apicra nigra, Catevala nigra, Haworthia venosa subsp. nigra, Haworthia ryneveldii, Haworthia schmidtiana
Scientific Classification
Family: Xanthorrhoeaceae
Subfamily: Asphodeloideae
Genus: Haworthia
Haworthia nigra is a slow-growing, erect succulent with deep greenish-black leaves, up to 4 inches (10 cm) tall. The pointy, partially folded, stiff leaves emerge from the center of the rosette. Outer and inner leaf sides have ridged, gray bumps called tubercles. Each new leathery leaf emerges from the center atop the one below it, which lends plants a stacked or tiered look. In winter’s chill or under excessive drought stress plants blush red. Overall, the foliage remains dark green with varying grades of gray to black. In late spring or summer, mature rosettes produce single, upright, wiry flower stems topped with tiny white flowers.
How to Grow and Care
Haworthia are not considered difficult houseplants to grow—if you can keep a pot of aloe alive on a windowsill, chances are you can do the same with a dish of Haworthia. As with all succulents, the most dangerous situation is too much water—they should never be allowed to sit in water under any circumstances. At the same time, these decorative little plants can be grown in interesting containers such as tea cups and even miniature baby shoes. If you’re given a Haworthia in such a container, make sure the container had adequate drainage. If it doesn’t, it might be a good idea to pop the plant out of its container and add a layer of gravel to the bottom to reduce the wicking action of the soil above. Finally, look out for sunburned spots on your plants.
Haworthia are small (usually remaining between 3 inches (7.5 cm) and 5 (12.5 cm) inches in height) and relatively slow-growing. They are often grown in small clusters in wide, shallow dishes. Over time, clusters will naturally enlarge as the mother plant sends off small plantlets.
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