Posted: 28/04/2012 at 20:06
Solanum crispum likes full sun but also shelter, a harsh winter might kill it and parts of it are toxic if ingested.
You could try a passion flower if you're not too far north? Or thonless rose if you don't mind a spot of tying in. Maybe not practical? What about a lovely ivy? No tying once established, evergreen, will take full sun as well as shade and beautiful foliage to contrast with the clematis?
The Golden Hop has gorgeous foliage and climbs without any trouble although it doesn't like the hottest part of the day.