When do cyms start initiating growth spikes?

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I have two standard (large) Cyms that sit out all summer and get fairly good light. I leave them out till close to freezing. We had weird weather a few weeks ago also and I had to bring them in but they are back out again. I have the start of a spike on one but nothing else so far. Last year I had short spike nubs by mid to late summer which rather surprised me. I guess our nights had been cool enough. Mine seem to bloom reliably with that fall chill before I bring them in. I get blooms anywhere from Nov. to Feb.