Apart from being north-facing, is it very shaded? As Millie said fuschia's can be good, but will die back in winter, and need some maintaining,(cut back to ground around Feb) as well as some decent light. You could try a fern bank,(ferns grouped together) always pretty and very easy to maintain. Ferns are evergreens and very low maintainence. Another plant that will do well in the shade is Choysia. A lovely plant, and easy to keep. It has a very nice flower and scent.