Posted: 06/02/2014 at 15:22
You could fan train fruit trees along the concrete fence. They will act as a storage radiator for heat, and so you could probably grow apricots as well as apples and pears and sweet cherries. Morello cherry would go on a north facing fence.
I would increase the depth of the borders as well, and then you could grow some veg in front of the fruit trees.