Small Seeded Black Oil Sunflower Seeds. Whole (Shell On), Non-GMO. Open Pollinated. Helianthus Annus. 95 days to full maturity. 8 to 12 days for microgreens. These black oil sunflower seeds have about 700-800 seeds per ounce (compare to roughly 300-600 large seeded type). We offer both large and small seeded options as different growers have different preferences. Approx 700 Seeds / Oz.