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General description and special characteristics – A climbing perennial with large pale blue flowers that produce 15-20 cm (6-8 in) winged pods at maturity. It can be planted as an annual or perennial.

Variety -

  • Day-Neutral - Blooms during longer days, allowing out of season production.
  • Pang Daeng Nawk – Short day-length variety from northern Thailand, produces long, tender pods (30 cm/12 in).