Cecil,
Concerning your statement that "they have not grown at all this year!", I would likely check the roots, root prune if they are pot bound, and then return the trees to the same pots. I believe no growth at this time, which is different from slow growth, is not only cause for concern but time for action (lime, fertilizer, etc which you may have already considered). Obviously you know this because of what you wrote about your Zucchini "it was pretty much root bound, I gave it a heavy root pruning and re potted it on 5/14 and now it is putting lots of leafs now!". Now you have an indicator/example but not necessarily proof (of the need for action). Why not do it again?