Posted: 01/04/2017 at 17:54
What about a small tree? Then it's trunk will be in the lower bit and you could plant something like hardy geraniums under it. I see the neighbours have a silver birch, something like that with a light canopy would provide dappled shade. Amelanchier? Rowan. Or a crab apple would help block the view and have blossom in spring and coloured fruit in autumn. A climbing rose would be lovely too.