Tony

There are two schools of thought on this. The first says that you should prune the lateral roots every year or two in order to keep the feeder roots close in to the trunk. The second says that you should just let it grow for optimum growth. Both are true. If you do no root pruning for several years the feeder roots are going to be fairly far from the trunk. On the other hand, if you chop the roots every year that's going to slow down the growth of the tree considerably. Myself I would judge from the nebari/root buttress development. If that's looking good I'd just let it grow, the feeder roots can be worked back latter.

Tony