Don't know about the JoAnne Pring, but I can tell you about my Perry's Baby Red.
I potted mine in a one gallon pot. It grew well, but didn't seem too interested in blooming as fast as others types planted that same day. But it did put out a lot of pads.
The tuber quickly grew across that one gallon pot. When it reached all the way across it, it started blooming. One bloom at a time at first, then it started putting up "doubles" and "tripples." Looking at the pot, I now see that the blooms are comming up from three different points along the tuber.
Right now, I'm thinking rather than waiting untill spring, I might re-pot it, and divide it to get two plants potted, and the rest floating in a bucket to see if the rest of the tuber can be convinced to throw off more plants for next yeat.
When I bought my Mungkala Ubon, I got 5 tubers. I floated them for a couple of weeks, only taking one section of a tuber and potting it. Since then, I've taken small starts from several tubers and grown them. And I still have most of the original tubers floating in a bucket, with quite a few new "eyes" starting more plants. By this time next year, I could easily have 100 plants, all from those 5 tubers.
Love to see if the Perry's Baby Red will be able to follow that act.
Mike S.
Spring Hill, FL