We planted an Autumn Blaze Maple last summer and it just THRIVED through the summer and again this spring... about the middle of the summer the leaves started browning around the edges... I took some into a local nursery and they said it was from over-watering.... we've cut back on the watering considerably but the tree is just getting worse! The leaves are now mostly brown and starting to fall off - the very tip top of the tree is where the leaves are still healthiest though... I don't want to lose my beautiful maple! Any suggestions or ideas of what else could be wrong with our beautiful tree??