Here is a 'Crimson Pygmy' barberry that I have just repotted. I turned this tree around and made the back into the front. I often end up doing this with trees after awhile. The new front has better roots and a better trunk position. This tree has to be cut back vigorously to keep it under control. The goal here is to make an informal broom style or whatever you want to call it. About 9 inches tall. First pic is the new front, second the back of the tree.