I have a 12ft princeton gold maple that is suffering again this year. Very healthy when purchased from the garden center I work at!!!! Planted properly good soil & drainage. Mulched. In full sun as was recommended. Watered deeply once a week..although we have had alot of rain lately. Have a very heavy clay soil, but dug a more than sufficient size hole, new triple mix & bone meal. This year as last... some winter damage. The leader actually died. Came out beautiful though.very bright yellow leaves...then increasingly...noticed insect damage..picked off some tent caterpillars....& again the upper yellow leaves are all bleaching out. Lots of leaves seem scorched on edges..some brown spots....tree looks unhappy. Lots of faded leaves....underside seems darker lime green. Haven't noticed any leaves drop to the ground yet. Last year a few did but not all. It was fertilized this spring with Miracle Grow spikes put in properly away from trunk. Have had it looked at by 4 people with 25yrs experience..no-one has the answer. It was suggested that maybe it should be moved into partial shade....& using a systemic fungcide. Any suggestions??? I can send a pic tomorrow. This tree was planted last spring07. Mabye just in shock?? I really love it.