Haworthiopsis koelmaniorum (Oberm. & D.S.Hardy) Boatwr. & J.C.Manning
Haworthia koelmaniorum, Haworthia limifolia var. koelmaniorum, Haworthiopsis koelmaniorum var. koelmaniorum, Tulista koelmaniorum
This species is native to South Africa (Mpumalanga).
Haworthiopsis koelmaniorum, formerly known as Haworthia koelmaniorum, is a slow-growing succulent that forms rosettes of leaves that range in color from dark brownish-green to tan to reddish. The rosettes grow up to 4 inches (10 cm) in diameter, usually solitary as the plant rarely forms offsets. Leaves are scabrid with small raised tubercles and short spines on margins and keel. Flowers are white with green to brownish veins and appear from summer to fall on slender, up to 14 inches (35 cm) tall stalks.
The specific epithet "koelmaniorum (kohl-man-ee-OR-um)" honors South African schoolteacher and horticulturist Arthur Koelman (1915-1994) and his wife Maria M.J. Koelman (1917-1993). Arthur Koelman is a founder of the Succulent Society of South Africa and a pioneer in Aloe hybridizing.
How to Grow and Care for Haworthiopsis koelmaniorum
Light: H. koelmaniorum thrives in semi-shaded positions. Brighter light conditions are needed to bring out the leaf coloration. Any window in your home or office is likely to be an appropriate setting for this succulent.
Soil: Use a commercial potting soil specially formulated for succulents or make your own well-draining potting mix.
Hardiness: This plant likes warmer temperatures in summer but cooler in winter. H. koelmaniorum can withstand temperatures as low as 30 to 50 °F (-1.1 to 10 °C), USDA hardiness zones 10a to 11b.
Watering: The best way to water this succulent is to use the "soak and dry" method. Get the soil thoroughly wet, and then wait until it is dry before watering again. Water your plant less during the winter when its growth slows down significantly. During the hottest summer months, when H. koelmaniorum is mostly dormant, water just enough to keep the leaves from shriveling.
Fertilizing: H. koelmaniorum is a slow-growing plant, and it does 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. Avoid summer fertilizing as this succulent is in a 6 to 8 weeks rest period.
Repotting: When the plant has outgrown its container, repot it in the spring or early summer into a new, slightly larger pot with fresh soil.
Propagation: H. koelmaniorum is mostly and easily grown from stem cuttings or by removing offsets from the mother plant. Take stem cuttings during the warmer months. Remove offsets when they have started developing their roots. Spring is the best time to sow seeds.
Learn more at How to Grow and Care for Haworthiopsis.
Toxicity of Haworthiopsis koelmaniorum
H. koelmaniorum is considered non-toxic to humans and animals.
Varieties and Hybrids of Haworthiopsis koelmaniorum
- Back to genus Haworthiopsis
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