Covering an unsightly north facing wall
I am looking for something which will conceal/cover a single storey garage wall. Unfortunately its North facing so it does somewhat limit what grows there, and the added issue is that I would be looking to plant in a planter which I will build along the wall, about 18''x18''. Currently its concrete below, but I am planning on smashing it all up and laying gravel. It is right next to a manhole cover so I dont want to put it into the ground for fear of upsetting any foundations.
The area is fairly sheltered as its right next to the house, and 12 foot opposite is an extension of the house. We have to stare at this wall when looking out on the garden so would like something attractive which will cover the wall. Something evergreen would be a bonus!
Is it possible?