Hello Tsuh Yang Iridaceae seed is quite long lived, especially if kept in the fridge. Your question does not reveal how old the seed is. Is it from winter growing or summer growing bulbs? Following the advice given to me by Rachel Saunders after a similar question many years ago, I do no longer sow seed of winter growing bulbs after the end of December. It is better to store the seed until the following fall because being sown too late will not give the seedling bulbs enough time to develop a bulb big enough to survive the first dormancy. This applies to the northern hemisphere, of course. Personally I have the experience that seed of Iridaceae, Lilium, Cyclamen, Gesneriads and many others will germinate well even after several years if stored in a fridge. There is nothing to lose in sowing..... But some seed, especially of the genus Iris can enter into a deep prolonged dormancy which is difficult to overcome. Uli _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>