Cabbage Seeds - Pak Choi - Jimao Choi - Hybrid. Annual. Brassica rapa Chinensis group. 20-30. Cool-warm season. NonGMO. This is feather type pak choi. Plants grow fast (20-30 days) and upright. Leaves are green, oval-long spoon shape with green petioles. Tolerant to heat. Excellent for baby leaf production. ~ 5,000 seeds per oz.