A narrow garden up against a fence

A narrow garden up against a fence. Get’s sun on and off in the summer..am able to grow veges there..but ..in the winter is cold and wet…no sun at all .. but bright light There’s a problem with water rat’s and possum’s so I’ve gone off growing veges in the summer What can I grow there all year round. I’d like some flowers and colour not big enough for tree’s or large bushes. Could grow on the fence as well.