Jennifer, I am not sure if the tree you speak of is the one in photo's at the beginning of this thread (w white stones around)?
Another photo may help.
If it is a pot with good space between caudex and wall of the pot. Too big a pot can cause issues with soil not drying back. The caudex will not get larger if put up into a large pot.
The caudex will become larger with age and if it is genetically meant to be.
Rick
