30 days to maturity. Brassica campestris Narinosa group. Misome Hybrid Mustard Seeds. Non-GMO, warm-season, annual, hybrid. A relatively recent hybrid between Komatsuna and Tatsoi, this versatile, uniform, and hardy green grows upright. The 10 inches tall plant produces tender, thick, savory, deep green leaves that hold well in the field. Misome is heat tolerant and can be grown throughout the year in many regions. Thanks to the short time needed to reach maturity, enjoy many harvests throughout the growing season! Even areas with a short growing season can manage at least one round of Misome. Approximately 15,813 seeds/ounce.