Hello! I have a dwarf Korean lilac tree that is struggling - it is well behind my dwarf Korean lilac shrubs in leafing out, and portions of the tree appear to be dead. It was planted in 2008. It receives well over 12 hours of sun a day and has been very healthy until about three years ago, when I noticed quite a bit of dead branches, which I then trimmed from the tree. There appear to be no pest or fungal issues. I'm currently waiting for the portions of my tree that aren't dead (green on the inside when I snap twigs) to leaf out, but I'm afraid that the tree might be dying and past the point of rescue. Have other folks had this issue with their Dwarf Korean lilac trees? Thank you!