A very vigorous, twining, evergreen, woody-stemmed perennial climber to 6m or more, with heart-shaped, coarsely-toothed leaves and racemes of trumpet-shaped, light violet-blue flowers 7cm across, ...
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.
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