Hyacinth Bean Vine - will grow 10 feet tall in one summer season - great to almost instantly fill a trellis or to climb a post or pole. Collect the purple pods in fall, store them over the winter and replant in Spring. Neverending purple flowers all summer!
Mosaic by Portland garden designer. [Yes, this is beautiful, but how do you keep the weeds from invading once it's a few years old, without using herbicides? I had a stone path once, not as elaborate, but spent all my spare time yanking out the weeds]