Hello Hans and All, Flotation method: Thank you for this advice. I was not aware that even sunken seeds would still germinate. Another point: never throw old seed away. I have sown seeds of Canna tuerkheimii, given to me by James Waddick in 2002 (thank you again, Jim) Out of 5 seeds sown 2 have germinated within days, which I find is not too bad for such old seeds. Bye for today Uli _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…