Clematis 'Proteus' freely produces the most flamboyant, semi-double flowers, stunning rosy-lilac semi-double during May, June, then single blooms in September.
Clematis 'Proteus' was raised by Charles Noble of Sunningdale, England.
This non-evergreen climber can be grown against a trellis, garden fence, wall, arches, pillars, pergolas, clambering over tree stumps and through large shrubs or planted in a container trained up bamboo canes or an obelisk.