Posted: 13/02/2014 at 19:19
The plants mentioned by others are all good & most will cope in pots, so some colour is possible.
A climber I love & have growing on a N facing fence, beneath NDN's overhanging Leylands (!!), so not much sun, is Hydrangea Peteolaris. I've also got it on a N facing garage wall that gets afternoon sun, so that 1 does better, but is an older plant anyway.It's a shrub that's self clinging, which if you gave it a good start, you could plant direct into a 'pocket'. You'd need to guide it up there & secure it to start with, & it can be slow to establish. Well worth the wait though IME. The white flowers smell wonderful & even in winter the bark is a good colour.
With any climber going up the fence do make sure that the panels are in good condition though as future fence maintenance will be compromised.
You could also use it as a host for climbers in pots in front of it, space permitting.... J.