Question: My coral bark maple struggles in too much sun. Because of a lack of shaded space, I endure it. It gets burn on the edges of its leaves, and now I see that the trunk is cracking and oozing. What can I do? J.J., Parker County.

Coral bark maples are forms of Japanese maples, and just as in the answer above, your tree needs to be given a lot more protection. This crack really concerns me, as it may be due to sunscald. Clean up any active decay, but do move the tree if you possibly can, even if that means giving it to a friend. I have a coral bark maple that gets no direct sunlight, yet mine scorches somewhat just due to heat.