This appears to be a Lablab purpureus (Hyacinth Bean) vine grown almost entirely for its attractive flowers and purple seed pods. It’s an annual that grows best in full sun with regular moisture. Lablab seeds produce a quick screen on a trellis or fence. Its flowers are beautiful and fragrant which and attract butterflies and hummingbirds, and it even produces edible leaves, flowers, pods, seeds and roots. Dry Lablab seeds are poisonous due to high concentrations of cyanogenic glucosides, and can only be eaten after prolonged boiling. We would not recommend eating it. How To Grow Hyacinth Bean Vine: Many gardeners recommend nicking the Hyacinth Bean seeds with a knife and then soaking the flower seed in water for 24 hours before sowing. Planting Hyacinth Bean seeds can be done directly outside once danger of frost has passed. Lablab typically blooms from mid summer to fall. The Hyacinth Bean herb can be a perennial in frost-free climate zones; however, in other zones it grows as an annual climbing vine.