I've tried Hermodactylus tuberosus from seed and from bulb. I've had no luck with it whatsoever. I've stopped trying. I've never seen it bloom in real life. I think the photographs in books and on the web are all fake. It's a vast conspiracy and all of you are in league to torment me with your claims of success. :-) Dennis in Cincinnati (where Asclepias tuberosa will grow!)