I don't intentionally buy or breed for Lates or Very Lates but do have a few by error & defaults. My most significant observation (Also mentioned earlier) is CMO (Cool morning opener). If the plant/bloom resists opening at autumn's predictable lower temperatures it is simply NOT much good to you unless you have the tolerance to wait for the day to progress - thus displaying blooms only toward mid-day or later (Or sometimes NOT opening at all.).
