since you are in Miami and can leave it outdoors year round i wouldnt root prune it at all, just increase the container size. do you ever plan to put it in the ground?

Ok wont pune for a while. But what is the best time of the year to re-pot it? i know that right before flowering is when there is not as much energy stored in the roots bc it is being disperced to the branches for flowers and fruit production. But this is my first year with the tree and im not sure when flowering will be?
Yes, i plan to plant it in the ground one day. maybe 2 more years.