I transplanted two japanese maples at my new house from my old. I planted them in my back yard and unknown to me, the part of the back yard that held water all winter long. I built the trees up when I planted them because I was going to build a bed around them this spring. My trees did well after the transplant, they kept thier buds. I looked at them today and the branches are turning a yellowish-green color and are no longer red. Has the water hurt the tree? If so, can they be saved? Please help, very expensive trees in trouble.