On the subject of invasiveness... Iris pseudacorus has been commonly available in the trade for decades, but very recently 14 states & provinces have enacted bans due to its tendency to invade & degrade wild natural areas. So I added a compilation of information about these bans to the SIGNA website for this year's Seed Exchange. Which is a good segue for me to say that the annual SIGNA Seed Exchange has launched today. Only members may buy seeds from this year's exchange, but surplus seeds from previous exchanges are available to anyone who wants them. Just don't buy Iris pseudacorus if you live in the affected areas. ;-) http://www.signa.org/index.pl?SeedList Dennis in Cincinnati (where it was 68 last night but now it's 38 and feels like 28 deg F) _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/…