67 days to maturity.Brassica rapa var. pekinensis. Yuki Hybrid Chinese Cabbage Seeds. Non-GMO, cool-season annual. Yuki is a medium-maturing variety. It has good uniformity and large head size with good disease and moderate bolting tolerance. This variety is bred for spring to early summer harvest in areas where bolting is a problem. Considered one of the headed Chinese cabbages, this vegetable is perfect for cool-weather gardens.~ 7,000 seeds per oz.