First which side of the house in North facing? What kind of soil do you have (clay, sand, loam etc) How much sun in hours does the sunniest side of the house get? Are you looking for color, low maintenance, low water consumption, etc? Are there any colors you don't like? How much landscaping do really want to put in and are we talking using trellises, enlarging the bed, framing the house etc. Which side of the house faces the road if that is applicable?