I've got two of these trees that were recently planted. On one of these trees, the leaves are drooping. The other is fine. They are on two different sides of the yard. The tree isn't losing leaves, and the leaves are not changing color, just drooping. We have had a lot of rain lately, and this side of the yard is more prone to retain some water. Do you think that this is the problem, just excess water? I just really don't want to lose the tree. Thanks in advance for your help.