I need some suggestions on one of my apple trees. It has not grown. I planted 4 trees 2 years ago all about 4' tall. three of them have grown drastically to as high as 16'. One though has barely grown 4 inches but is producing so many apples it is tough to keep upright. Seems like it is putting all of its energy into making fruit (which is great) but I fear all that weight is going to eventually snap the few branches it has. Other trees have an apple or two here and there that are kind of small but the little guy has fist sized ones already (about 3 dozen). Any help appreciated.