Answer: Based on your description, it is apparent that there was significant die back on the plant this past winter. This can be caused by weather extremes, a problem with the graft if the plant is grafted, damage to the roots or trunk, or even pest or disease. You might wish to consult with your county extension as to the cause of the damage and what if anything you can do to help the plant. I'm sorry I can't be more specific.
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