How do you grow hoodia gordonii?

Hoodia is a small Asclepiad genus of 10 to 20 species, from southwestern Africa. They form clumps of erect multi angled stems. Extracts of Hoodia has been used recently to manufacture appetite suppressant medications. The close genus Trichocaulon is sometimes included in Hoodia. One of the hardiest of the asclepiads, most Hoodias will take a small amount of frost. The large brownish flowers are pollinated by flies, and use a very distinct carrion smell to attract them. They form in liberally at the tip of the stems. Recommended Temperature Zone: USDA: 10-11 Frost Tolerance: Hardy to 28°F ( -2°C) Sun Exposure: Light shade, morning sun Origin: Southwestern Africa Growth Habits: Succulent, forming clumps of 12 inches tall, 12 inches wide (30 by 30 cm) Propagation: Seed