I planted a maple in October of 04. We have hot summers here in the high mountains of Idaho. When spring arrived and the tree started to leaf out, I noticed that the very top leaves of this 20' beauty did not fully form. I have some bare branches where there are no leaves at all. I think I have given it enough water. I will run the hose at a small drip for a day and it still does not look healthy to me. Any suggestions? This tree has a 5-6" caliper and was dug & burlaped on a tree farm not far from my house so I would assume that it has been through a few summers.