Dave said, " as I haven't had as great a success as desired, especially with the bearded Iris." Dave check out the link below and scroll down to reply #23 by Rafa. http://www.srgc.org.uk/smf/index.php?topic=847.15 I tried this method with some iris seed that had been sitting in a pot for 2 years and had great success. It's a bit tricky and you should try it on some extra seeds first till you get the hang of it, (I had a lot of tb iris seeds to practice on), but it works like a charm. I've had much better success using this method than waiting and waiting and waiting for some of these iris seeds to germinate. Good luck. Linda Okotoks, AB Canada Zone 3 It's winter! Brrrrr!