25-45 days to maturity.Brassica rapa var. pekinensis. Yukina Savoy Chinese Cabbage Seeds. Non-GMO, cool-season annual, heirloom. Yukina Savoy looks like a larger and savoyed version of Tatsoi. Considered one of the loose-headed Chinese cabbages, this nutrient-dense leafy green is perfect for cool-weather gardens. It is vigorous, easy to grow, heat and cold-resistant, and can be grown year-round. ~ 8,400 seeds per oz.