Haworthia sp., or Window-Pane Plants, are small clump-forming succulents native to South Africa. The small rosettes of light green leaves have clear or lighter areas that allow light transmission so that the photosynthetic surface is within the core of the leaf. The rosettes will reach up to 3 inches (7.5 cm) across with clumps reaching 4-6 inches (10-15 cm) tall and up to several feet across with time. They are very easy plants to grow and are well suited for the home environment.
Blooming: In the greenhouse, plants bloom in late winter to early spring. The flower stalks will reach about 12 inches (30 cm) tall with very small greenish-white flowers.
Culture: Haworthia plants need partial shade with well-drained soil mix. These plants will even tolerate the lower light levels of the home. In the greenhouse, we use a soil mix consisting of 1 part peat moss to 1 part loam to 2 parts coarse sand. The plants are well watered and allowed to dry thoroughly before watering again. We fertilize them only once during the growing season, in late spring after flowering using a balanced fertilizer diluted to 1/2 the strength recommended on the label. During the winter months, the plants are watered only enough to keep the rosettes from shriveling.
Propagation: Haworthia plants are easily propagated from division of older clumps in the spring. They are also very easily started from seed when available.
Haworthia sp. was featured as Plant of the Week December 22, 2006-January 4, 2007.
Guide to Past Plants-of-the-Week:
Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2012 All rights reserved.