Bean vine was grown at MonticelloExactly what it is: The purple hyacinth bean vine grows as an annual in Colorado. Originally from tropical Asia, this vibrant, rapidly growing vine is likewise referred to as the Thomas Jefferson vine because he grew this plant at Monticello.
this post Although many parts of this plant are edible, the dry seeds should be well prepared in two changes of water prior to consuming. Raw dry seeds are poisonous.
Appearance: Intense, deep purple flowers, resembling pea or bean flowers, blossom on dark-green foliage. Clusters of shining purple seed pods 3 to 4 inches long follow the flowers. The vine will scramble up a trellis providing vertical interest to a garden or topple down a slope as a ground cover.
Growing: Sow seeds in a warm spot mid to late May. The plant isn't fussy about soil and thrives with moderate watering. It's a vigorous grower - one seed can produce a vine 6 to 10 feet high in a single season. The vine flowers until frost and will draw in butterflies and hummingbirds. Chosen as a Plant Select plant for 2006, the vine is an attractive backdrop for roses. For more details about Plant Select, go to www.plantselect.org.