Chinese Cabbage Seeds - Yukina Savoy. Heirloom, Non-GMO. Brassica rapa Pekinensis Group. 25-45 days to maturity. Cool season annual. Yukina Savoy looks like a larger and savoyed version of Tatsoi. The thick, dark green, shiny, spoon-shaped leaves grow upright on pale green petioles. This vigorous and easy to grow plant is heat and cold resistant and can be grown year round. It has a mild flavor when harvested young. Chinese cabbage prefers cool temperatures for its main growing season. ~ 8,400 seeds per oz.