Hi, We moved into our house 2 years ago and this gorgeous Sambuca shrub was huge and in great shape. It has obviously been here for a very long time.

This winter was harsh, harsh, harsh and I'm not sure if it has hurt the shrub. There is nothing happening at the top and the leaves that have come out at the bottom are all wilting. I have researched online and everyone says that wilting leaves means cane borers, but I have cut off numerous stems and there are no holes in any of them.

Does anyone have any ideas why the leaves may be wilting and why the top has no leaves at all?