50 to 55 Days to maturity. Brassica oleracea var alboglabra. Chinese Broccoli Seeds - Suiho - Hybrid seeds. Annual, Hybrid. Also known as Noble Jade or Emerald Green variety. This variety of Chinese broccoli has 3/4” thick stems with rounded and slightly wrinkled, medium sized green leaves. This cool season annual plant is semi-spreading and grows 14” tall. It is popular with growers because of its crisp and tender stems that are shorter and thicker than the Ryokuho variety. ~ 6,300 seeds / oz.