Echinopsis hammerschmidii, a native of Bolivia is a small cactus reaching about 8 inches (20 cm) tall by 4 inches (10 cm) thick. It has 12-15 thick ribs with ¼ inch (0.5 cm) awl shaped spines. They are of easy culture and make a great cactus for beginners.
Blooming Time: In spring the showy white flowers are 4 inches (10 cm) across to 8 inches (20 cm) long.
Culture: Echinopsis hammerschmidii need full sun to partial shade and a well-drained soil mix. We use a soil mix consisting of 2 parts sand to 1 part peat moss to 1 part loam. To this, mix small pea gravel to ensure good drainage. In the spring, when new growth has begun, the plants are watered on a regular basis, but are allowed to dry in between watering. They are fertilized only once during the growing season. In the fall and winter, they should be watered only enough to keep them from shriveling. Wintertime temperatures should be around 50°F (10°C).
Propagation: Echinopsis hammerschmidii are propagated in spring by the removal of offsets or by seed. Seed should be sown in a sandy mix and germinate in 14 to 21 days at 68° to 70°F (20-21°C).
Echinopsis hammerschmidii was featured as Plant of the Week May 9-15, 2003.
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 the late 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.