35 days to maturity.Brassica rapa var chinensis. Fun Jen Hybrid Pak Choi Chinese Cabbage Seeds. Non-GMO, warm or cool-season annual, hybrid. This is a very popular frilly leaf pak choi or "Bok Choy" in Taiwan. The plant is semi-spreading and weighs about half a pound at maturity. The leaves are green, frilly, and wrinkled with smooth white petioles. Can be grown year-round in subtropical areas. The leaves are very tender and crisp and can be prepared in stir-fry or added to soups. ~ 10,500 seeds per oz.