(Lablab purpurea) 25 seeds per pack. Gorgeous purple colored, annual vine. Produces bright purple bean pods. Flowers are pink/purple. Very easy to grow, the hyacinth bean can be grown anywhere during warm months. While a delicious and noteworthy plant, note that dry seeds are poisonous to eat and must be boiled. Grows to 10ft. #522 View plant database page. Detailed seed germination instructions.