50-70 Days to maturity. Raphanus sativus. Black Spanish Round Radish Seeds. Non-GMO, annual, open-pollinated, heirloom. Also known as Noir Gros Rond D’hiver or Round Black Spanish Radish. Suitable for growing in fields, greenhouses, or raised beds. With a stunning black exterior and pure white flesh, this radish is a show-stopper! The Black Spanish Round Radish takes a bit longer than other radishes to mature, but makes a good keeper. Growers can expect a zippy flavor, a bit hotter than most. ~3,000 seeds/oz.