25-35 days for Miao (early stage), 45-50 Days to maturity. Brassica rapa var. Chinensis. Tall White Stem Pak Choi Hybrid Seeds.Non-GMO, Annual, Hybrid. Cool-Warm Season. Excellent pak choi variety for miao, early stage harvesting for younger pak choi and for full maturity, large size pak choi. Leaves are dark green with white petioles. Plant in the spring, summer, and fall for pak choi miao. Plant in the spring, summer and fall for full maturity pak choi. ~ 11,250 seeds / oz.