Dear Marie-Paule, Gethyllis was the topic of the week in July 2004. You can learn about it by reading the posts: http://pacificbulbsociety.org/pbslist/old.php/… Also helpful would be Rachel Saunders' introduction: http://pacificbulbsociety.org/pbslist/old.php/… Her last paragraph says: "The best way to grow Gethyllis is in a large deep pot in a well-drained sandy potting mix. They need to be kept dry in summer and damp in winter, and they are simple to grow from seed." Since I killed the only ones I tried to grown from seed I'm not sure I'd agree with simple to grow from seed but then I was trying to grow them at the wrong time of the year since the seed needs to be planted immediately and mine was from South Africa. I bought some bulbs from Gordon Summerfield in South Africa and am anxiously waiting to see if they have turned themselves around and will reappear in the late fall. They grew very well when I planted them, but were on the wrong cycle, but have been dormant for awhile now. I hope this helps. Mary Sue