Dear Randall and others interested, On pp. 3-4 in this link to the Tuscon Cactus and Succulent Society newsletter, see the article by Mark Dimmitt: http://www.tucsoncactus.org/pdf_files/June10.pdf Hope this is helpful although I haven't grown it but would love to try. Best wishes, Pamela Pamela Slate P.O. Box 5316 Carefree AZ 85377