Jim: I think if we left C. x powellii in the ground long enough, it would pull itself back to Africa. I was able to dig bulbs from the garden of the late Elizabeth Lawrence's Charlotte garden. The bottom of the bulbs were 28" deep. > > Just how deep does C. x powellii grow in mild climates? > > Best Jim W. Tony Avent Plant Delights Nursery @ Juniper Level Botanic Garden 9241 Sauls Road Raleigh, NC 27603 USA Minimum Winter Temps 0-5 F Maximum Summer Temps 95-105F USDA Hardiness Zone 7b email tony@plantdelights.com website http://www.plantdel.com/ phone 919 772-4794 fax 919 772-4752 "I consider every plant hardy until I have killed it myself...at least three times" - Avent