Last spring we planted an 8 ft Bloodgood maple and a Crimson Queen maple about 15 ft apart in a raised bed that gets filtered sun. Both were in 15 gallon containers. The Bloodgood, after a good start began drying out at the ends of branches when 100F temps hit a few weeks back, and though now temps are lower, the dessication has progressively gotten worse regardless how much water it gets. About 2/3 of the leaves are now shriveled and crunchy. The leaves did not turn brown when they dried out. The branches are still flexible, though some tips are beginning to turn dry and brittle. What can I do to stop this? Is it doomed? I could move it to a shadier location but I'm afraid the shock would be too much for it. The Crimson Queen in the same environment is doing very well and looks great; not so much as a brown leaf tip (though it has gone mostly green).