70-90 Days to maturity. Vigna unguiculata subsp. sesquipedalis. Kurosanjaku Yard Long Bean Seeds. Non-GMO, annual, open-pollinated, heat-tolerant, heirloom, pole, snap, Asian, specialty bean. Suitable for growing in containers, garden plots, raised beds, and greenhouses. This fast-growing, high-yield bean thrives in the heat. It is a black-seeded variety and is one of the most popular types grown. These extra-long dark green stringless beans are highly prized for their sweet and crunchy pods. Traditionally interplanted with arugula and bitter melon vines for increased pest resistance, faster growth, and efficient use of space. ~180 seeds/oz.