50 Days to maturity. Brassica rapa var. chinensis ‘Canton White’. Canton White Pak Choi Cabbage Seeds. Non-GMO, biennial, heirloom. Canton-type Pak Choi is known for its delectable taste when harvested young. They are among the most compact, tender, and best flavored. They are also better suited for warm weather than most types of pak choi. Enjoy this juicy white stalked variety at any stage of growth for a flash of interesting cabbage flavor and a hint of mustard-like spice. Approx 11,250 seeds / oz.