Euphorbia obesa

The Euphorbia obesa is an endemic species (native and restricted to a certain region), indigenous to Kendrew, a small region of the Great Karroo located in the Northern Cape of South Africa. This succulent does grow in full sun, but it typically takes refuge under the protection of low shrubs and in between low boulders. Its native soil is sandy. Its natural colors efficiently camouflage the plant amongst the terrain. Summer rainfall in their native region ranges from 8" - 12" annually.

The Euphorbia obesa is a solitary succulent devoid of spines and leaves. Coloration and shape are variable. Colors include grey green, iron-grey, bluish-green and brown-green. Moreover, red-brown or dull purplish bands beautifully circle the plant along with finely marked longitudinal seams marking the succulent's surface. This creates an effect closely resembling plaid. The stem is solid, firm, dome-shaped and spherical. Juvenile specimens take on a rounded, sea urchin-like shape. Older specimens often become elongated. This plant typically grows 8, vertical, broad and slightly raised ribs. The number of ribs may increase to 10 as the specimen matures. This species often engages in branching and suckering, forming clusters of spheres. It sports a tapering tap root. Flowers are yellow and very small. The Euphorbia obesa is a dioecious plant. Male and female reproductive systems occur on separate plants. Both plants produce flowers, however, one plant has the male reproductive parts and the other plant has the female parts.

The Euphorbia obesa thrives in full sun to partial shade. Moderate shade can be well tolerated, but the plant must be slowly transitioned before it is placed in full sun. If not, it will likely become severely scorched and may not recover. Outdoor cultivation is certainly possible where frost is not a large factor. The USDA plant hardiness zone is 10 - 11 (hardy down to 30° F). As with any cactus or succulent, if a cold snap is predicted, cover the plant with a tarp or blanket. Do not forget to prop the cover up with a stick or pole, so you do not crush the plant. Please do not hurt your friend! This species does best in a well-draining mineral soil. Happily, it is tolerant to a wide range of soil types. As mentioned, well-draining soil is imperative to success. During the summer months, water sparingly and be careful to keep the succulent dry during the winter months. Remember where this plant is native to and how it evolved over the years! It is a slow growing and long living plant. Once established, this plant will be content in the same position and the same soil for years to come.

Synonyms:

Euphorbia obesa subs. symmetrica (A.C.White, R.A.Dyer & B.Sloane) G.D.Rowley