70 days to maturity.Brassica rapa var. pekinensis. WR 70 Days Hybrid Chinese Cabbage Seeds. Non-GMO, cool-season annual. This early maturing, medium green napa cabbage variety has wide adaptability. Grow this variety where other napas are difficult to cultivate. The heads can weigh over 5 lbs at maturity. It has good cold tolerance, medium heat tolerance, disease resistance, and is slow bolting. A nutrient-rich vegetable loaded with vitamin A, potassium, and folic acid. This variety is a fall-to-winter harvest type but can be sown in spring. ~ 7,500 seeds per oz.