Hi Arnold: I have posted this before, so apologies to those who remember it. I moved my Lycoris from the hot interior of California to the cool coast a few years ago. The temperatures they left were in excess of 100F, and they came here to temperatures of about 60F or less. I stored them in a garage, since they were dormant, returning two weeks later to find the most amazing mass blooming I have ever seen, especially of L. radiata. The flowers were a bit pallid, since they had no light, but were lovely nonetheless. This would seem to indicate that it was the temperature drop - in this case quite a significant one. Diana Telos Rare Bulbs ----- Original Message ----- From: "arnold trachtenberg" <arnold@nj.rr.com> To: "Pacific Bulb Society" <pbs@lists.ibiblio.org> Sent: Tuesday, August 16, 2005 10:36 AM Subject: Re: [pbs] Lycoris and Rain > John: > You have touched on a favorite topic of mine, what triggers a bulb to > put forth a flower at a specific time of year. > > Is it the availability of water as in spring rains, drop in temperature > as you have mentioned for lycoris or changes in light intensity or > duration. I have some cyclamen hederifolium flowering that have been > sitting out side on a stone wall. I put my boophone disticha in the > basement under lights for the winter and with out changes in water, > light duration it almost always comes into growth in early March. > > I imagine there are chemical triggers that are in place that are > responsible for the flower initiation. > > Any thoughts out there? > > Arnold > _______________________________________________ > pbs mailing list > pbs@lists.ibiblio.org > http://www.pacificbulbsociety.org/list.php