It isn't clear how we can add data to the wonderful compilation of tips at http://pacificbulbsociety.org/pbswiki/index.php/…. A new entry would be Pycella ignea (a wonderful S. American bulb). I did some test using warm, cold, light and dark. The best method I found was to float the shiny flat black seed on water in the refrigerator for 10-14 days. Then warm up and wait a day or two for radicles to form and then plant on surface. I don't think Dark vs Light matters much, but the cold pretreatment makes an enormous difference. Calostemma purpurea did well when planted outside in late fall, early winter (in Bay area without frost) -- Paul Licht, Director Univ. California Botanical Garden 200 Centennial Drive Berkeley, CA 94720 (510)-643-8999 http://botanicalgarden.berkeley.edu/