Organic Seeds. ORGANIC SEEDSAll seeds on this page are certified organic. BEANSCertified Organic Seed #O213 - BLACK TURTLE SOUP BEAN 90 days - This old heirloom variety was first introduced in the late 1700's, and has beautiful, jet black seeds. Heirloom Seeds: Sustainably Grown, Organic, Untreated and Open-Pollinated Sustainable Seed Company. Seeds of Change Homepage.