If I had known earlier this year about the sun exposure issue I might have been able to correct the shade issue. That would not have fixed the humidity issue which I think is also a problem. At this point, I doubt anything else past what I have done will help.
I had some thoughts of putting plastic over the tree under the shade of the boxes so I could raise the humidity. At this point I doubt that would help.
Am questioning if there is any hope of this improving or if I should simply remove the trees that are not making it.
I even have a Cowart Muskadine grape that has not put out. The wood looks OK, have watered it faithfully 2 times per week since I planted it but nothing has happened. That plant was bought from a different source than the fruit trees. Bought strawberries and blackberry plants from that source and they are doing great.
I have deleted my bookmark for the Texas A&M ag site. Perhaps some FReeper Texan can supply it? I am concerned about the new sprouts from below the grafts and I think you will need advice closer to home