Organic Pinto Bean Seeds. Organic. Non-GMO. Annual. Phaseolus vulgaris. 50-60 days for green bean. 90-110 for dry pinto bean. Pinto bean is one of the most hardy and popular bush beans grown. Native to hot, arid, and full sun climates, pinto bean is a relatively quick producer and begins to produce as soon as 50-60 days. About 70 pinto beans per ounce.