Why are the leaves drying and going brown?
I recently planted a sugar maple tree cultivar (2-3" dia) which was purchased from a nursery (about one month ago). For the last few weeks, the tree has been looking good. Now within a matter of three or four days, the majority of leaves have dried out (have become crispy) and gone brown (just as in fall but without the fall colors). The top leaves are still green but that's only at the very top.
As there is a lot of clay in our yard in some parts of our yard (although the soil seemed good around the tree when excavated), we planted the tree on 4 inches of pea gravel to ensure drainage in winter (as there is some standing water in some parts). Also the soil around the rootball was replaced with a topsoil and peat mix to balance the Ph.
It was then fertilised. Why are the leaves drying out and does this mean the tree is dying?
What can be done? I can email some digital pictures if needed.