Wisteria
Wisteria is inclined to grow on the large side. They nevertheless can create a wonderfully misty air of mystery in the right situation, although some of the violet/blues can be a little depressing.
A member of the Pea Family, Leguminosae, it has a pinnate leaf, and grows at a considerable rate, twinning its way up pergolas, walls with supports and even up trees.
Because of their vigor, they generally need to be kept to within reasonable bounds, so late Winter pruning is normally advisable.
Wisteria sinensis, the Chinese Wisteria is amongst the most popular species, and this variety, called ‘Alba’ is an outstanding white alternative to the various shades of blue.