Answer: Unfortunately, based on your description, I am not able to tell you what is happening to your tree. This tree needs an evenly moist soil like a wrung out sponge, never saturated/sopping wet and not dry. If it is in a low spot where water collects after rain, it might need a location with better drainage. On the other hand, if it was allowed to dry out at some point it could discolor as well. It might be going through transplant shock. It might not be rooting well underground. It might have a pest or disease problem. It is difficult to diagnose this type of problem long distance. I would strongly suggest you work with your local county extension and your retailer to determine what is happening. If it is something that requires a chemical control, your county extension will have the most up to date information on what to use and how/when is best to use it. It is better to consult with them now than to wait and let the problem get any worse.
Q&A Library Searching Tips