85 days to maturity. Sesame indicum. Kurogoma Black Sesame Seeds. Annual. Black sesame seeds differ from other sesame seeds in both color and flavor—they pack a huge punch compared to white or tan varieties! If you’re looking to add some zest to your usual dishes, grow some Kurogoma sesame. If you have a long, warm growing season, then these seeds will grow very well. If you don’t have a long season, no worries; you can start them indoors instead. Once you harvest your seeds, you can roast, dry, or grind them as you wish. About 13000 seeds an ounce.