Posted: 03/05/2012 at 17:31
We have a jasmine that is supposed to be growing up an arch but it's very slow growing, and also suffers from sooty mould due to scale insects.
Clematis is good for combining with other, slower-growing plants. The fast-growing ones like Montana and Armandii don't need much cutting back but might get a bit out of hand as they are very vigorous. Of the others, the Viticella and Jackmanii varieties are very hardy and quite profuse once they get going. They do need cutting back in early spring, so they're not there all year round.
Passion flowers climb well nad stay green all year round (with luck).
Perennial sweet peas are another option but the vanish completely in the winter. You could also grow annual climbers like nasturtiums or thunbergia (Black eyed Susan) to add a bit of summer colour.