Hi, Jan. If you're talking about winter-growing bulbs in the northern hemisphere, the exchange would need to be mid-summer to fall in order to give time for that year's seeds to ripen (sometime in July to September). In April-May some of the winter-growing bulbs are still in bloom. On the other hand, if you're doing seeds for the southern hemisphere, April-May is a great time for an exchange because it's their planting season. If you want to hit both hemispheres, maybe a spring exchange and a fall one would be best. Mike San Jose, CA _______________________________________________ pbs mailing list pbs@lists.pacificbulbsociety.net http://lists.pacificbulbsociety.net/cgi-bin/… Unsubscribe: <mailto:pbs-unsubscribe@lists.pacificbulbsociety.net>