I have a very large Bloodgood Japanese Maple near the front of my house that had begun to leaf out when the cold snap hit earlier this year. I was told to leave it alone and it would probably be fine. It does have leaves, but anywhere from 1-3 feet of the ends of the limbs are definately dead (the smaller twigs easily snap off). Many leaves have come out on the trunk, which I rubbed off, but now some of the leaves on the limbs are drying up and falling off. Is there something I can do to give this tree a better chance of survival?