I've been using your method for the last couple of years, Jim and last year I got one bloom stalk on one plant. This year, nothing. You're maybe a little bit colder in winter than I am, though.
It was a VERY mild and late winter this year, so that may also be somewhat to blame, but I think I'm going to try for more winter chilling before giving them some sun next spring. After that, if no flowers are forthcoming I'm going to give you all my Cyms to see if they'll perform for you. Then I can just enjoy your pictures . .