75‒90 days. Cranberry beans arrived from England around 1825 and have firmly established themselves as the pinnacle of quality in a horticultural bean. Self-supporting, bush-type plants produce bountiful harvests of slender green beans that reach 3‒5 inches long with a round cross section. Enjoy them freshly shelled, or allow them to come to full maturity for the hearty, robust flavor of a dry shelling bean. Seeds per ounce: 43.