I planted a Coral Bark maple about one year ago. It never really took off, and seems to be going downhill. It is kind of sparse (both branches and leaves) and the leaves that are coming in seem to be small and droopy. We have had a ridiculous amount of rain this spring and I am sure that isn't helping things.

When I planted it, I think I may have dug too big of a hole. I amended it with some compost and top soil because I have pretty bad clay soil. My guess is that it is holding too much water.

Are JM's pretty slow to establish, or should it have had a lot of new growth by this point? I really hope it can pull through because it is a beautiful tree (not to mention expensive). If this is a drainage issue is there anything I can do?