What I do, is, I make a diluted mix of my bunny pottty ( you could use a little of other fertilizer for transplanting), and soak the pot that has the plant. Let is soak and drink for a few minutes, meanwhile I prepare the other pot, putting about an inch of wood chips at the bottom for drainage. also, wood chips soak water like sponge, so the plant has access to some if needed. then the tree and soil come out easier from the pot, and usually the roots are all into one ball. So, I put the pot with plant and the pot inside the next to know how much soil I should put at the bottom. Once that is done, just pull the plant by the trunk and jiggle a little, should come out easy... just gently put it in the new pot and fill with more soil, no need to water again since there is lots of water in the plant, but you may add more, since it is so hot there. keep it in the shade for a few days that helps with the 'shock'. Good luck.