We have a small courtyard garden. The walls around it are around 6 metres high, it's about 5 metres x 5 metres and currently has a couple of cypress trees, an old olive tree, a very small pond and a grass area. This weekend the grass is going to go and we'll put down gravel in its place. The area is just too shady and too dry so the upkeep of the grass was nigh on impossible. We're going to put a few large pots on the floor and a couple that'll be raised in some metal supports. My question is what would work well there. I was thinking of a couple of grasses but would also like something with a bit of colour too that'll have some interest all year round - maybe an ivy for one but would also like something flowering. Any recommendations?
Bear in mind that the area gets midday sun (max 4 hours in Summer) but is generally shaded by the walls, it gets very hot in the Summer > 35 degrees and quite cold in winter < -5 degrees.
Cheers!