John: I would agree that genetic distribution plays a role in Gladiolus dalenii as we have seen this first hand. We have clones that bloom in May/June and others that flower in October/November. Such has not been the case with kniphofia. We were given "earlier flowering forms" of K. rooperi and K. sarmentosa that flowered starting in fall and all winter when grown about 3 hours south (1 zone warmer). When we planted them, they changed cycles and flowered during the time that we know as normal for those species, K. rooperi in the late summer through early October and late March for K. sarmentosa. I've since grown both from numerous wild collections, and unlike the gladiolus have seen no difference in flowering times. Thoughts? Tony Avent Plant Delights Nursery @ Juniper Level Botanic Garden 9241 Sauls Road Raleigh, North Carolina 27603 USA Minimum Winter Temps 0-5 F Maximum Summer Temps 95-105F USDA Hardiness Zone 7b email tony@plantdelights.com website http://www.plantdelights.com/ phone 919 772-4794 fax 919 772-4752 "I consider every plant hardy until I have killed it myself...at least three times" - Avent Lauw de Jager wrote: > Tony, > As John and Ellen confirm, this must have something to o with region of > origin of the various populations. The same cause of the difference in > flowering period was noted for Gladiolus dalenii. > Greetings > > Lauw de Jager > > > Le 28/02/08 13:26, « Tony Avent » <tony@plantdelights.com> a écrit : > >> I continue to be fascinated by how climate affects flowering time. >> Kniphofia rooperi flowers here from August-October. >> > > > > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php > http://pacificbulbsociety.org/pbswiki/ > >