40-60 Days to maturity. Brassica juncea. Gai Choi Mustard Seeds. Non-GMO, annual heirloom. Gai Choi is the most commonly grown variety of Chinese mustard. It’s used not only in Asian cuisines but also in many Italian dishes and cuisines in the United States, Europe, and internationally. Its flavor is of the traditional “mustard,” reminiscent of Wasabi mustard being hot! It is a loose “heading” type with broad green leaves and thick white stems. It grows very quickly and is well suited for growing in cooler climates, as an early spring crop, or for a fall harvest. Approx 9,500 seeds / oz.