I have a Japanese Red Dragon currently in a 13x13 in garden pot. I'd like to take it out of this pot and put it in one more ornamental, but I'm not sure if I should increase the size of the new pot, or leave it in one similar size? I don't know how large the root ball is as I have not taken it out of the current pot which it was purchased in about a year ago. If I change pots, should I got for one that's the same in HxW (similar to the current shape) or one that is wider and more shallow ( like a big bowl).
Thank you for advice.
Thank you for advice.