Posted: 11/06/2012 at 09:41
I'd go for the hydrangea if you want a fairly densely-covered green wall - its a lovely fresh green and the white flowers are long-lasting and beautiful. Thats the way to go if you want simple, clean and fresh. Its a low-maintenance option too as it'll self-cling after a bit of initial encourgagement with a few temporary wires and only needs to be pruned if you want to.
If you want more flower than foliage and don't mind giving it all a bit more attention in terms of pruning and tying-in, I'd have one of the above-named roses plus a clematis (or even two!) through it. Most clems and all roses want some sunshine on their heads, but by no means would want it all day long - their petals are delicate and will frazzle in baking heat. Both would prefer cool, moist, rich conditions at their feet. The hydrangea likes the same, but would tolerate drier, poorer conditions.
Honeysuckle may also be worth a look if you're a particular fan and don't mind keeping it under control.
Spoilt for choice! x