Posted: 12/09/2016 at 06:41
Or a weeping cherry perhaps?
I'm sorry but I'd get rid of the rocks - how's water supposed to get to the roots of the tree, not to mention any feed that it needs?
It's got leylandii behind it that take all the water out of the soil, and then rocks on top of it's roots so the rain can't penetrate.
I'd clear a circle a metre in diameter around the trunk, free from any grass or other plants, then water well and mulch with soil improver for the winter and in the spring give it a feed of Fish, Blood and Bone - that'll give it a much better chance.