I have a potted (large pot) tangerine tree that is now full of blossoms. This is the second year of production. My question is whether I need to think about cutting back the roots after this season. I have kept this tree pruned and its about four feet high. I have done root pruning on some of my bonsai but have never worked on a large specimen.

Should I prune the roots? If I need to, when can this be done? Your feedback will be greatly appreciated.