Thanks!
I just got my first little ones at the beginning of last year, and those did fantastically well. That B52 rhizome was no bigger than my pinky finger nail, now it's almost filled that whole pot. They all seemed to go into dormancy just fine. There was one older one in that big pot that decided to flower early in the year, around March or so. None of the other ones were big enough at that time to flower, but I'm quite sure they will next year ;-)