If you tell us your general location, that helps people to answer you
more fully. Some roses don't mind north facing aspects (check out the
David Austin site) but clematis don't like to dry out so you'd have be
careful about that. We have a Clematis expert here who holds a
National Collection, so hopefully, he'll be along to give you some
advice there. Holboellia latifolia and H. coriacea don't mind a north
aspect and are evergreen and highly scented in spring. We often
recommend Geranium palmatum and Vinca for shady areas and shrubs like
Sarcococca but to some extent what you can grow will be determined by
the climate you have.
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Sacha
www.hillhousenursery.co.uk
South Devon