Hi, I don't know about the various forms of C. scabrum in South Africa, but C. scabrum and its hybrids do well in southeast Texas. C. bulbisperumum naturalizes and is most commonly seen around Houston, but C. scabrum is a pass-along plant in many southern gardens. C. x herbertii (Milk and Wine) is also easily found along the Gulf Coast. I don't think C. zeylanicum is too common (not sure). Marcelle Sheppard in Beaumont, TX grows a number of C. scabrum. They seem to enjoy zone 9, year round rain and lots of summer heat, and adequate but not exceptional drainage. Marcelle's Crinums http://marcellescrinums.com/ Web Article: Milk and Wine Lily (and relatives) http://sfasu.edu/ag/arboretum/… Cordially