90 days to maturity.Brassica rapa var. pekinensis. Winter Crisp Hybrid Chinese Cabbage Seeds. Non-GMO, cool-season annual, hybrid. Winter Crisp barrel heads have a weight of about 6.0 pounds. Excellent cold tolerance, disease resistance, and is a good variety for winter harvesting. A nutrient-rich vegetable loaded with vitamin A, potassium, and folic acid. Napa cabbage prefers cool temperatures for its main growing season. ~ 9,400 seeds per oz.