Whatever you are looking for in a perennial flowering vine, there is a clematis to help you out. Most require as much sun as possible, consistent watering, and cool roots. Planting a 12 to 18 inch plant at the base of the clematis will accomplish this.
Clematis need a little lateral help to reach their true heights, so give them a trellis or wire if growing them against a fence. They love rich, organic soil … work in some compost when you plant them.