45 Days to full maturity. 20-30 Days for baby leaf. 10-15 Days for microgreens. Brassica rapa Chinensis group. Red Choi Pak Choi Seeds. Annual, Hybrid. Cool Season. This special hybrid pak choi has dark red leaves with green undersides. At maturity, the petioles are light green. It has a delightful flavor. A colorful addition to a microgreens mix. Harvest as baby leaf and at full maturity. ~ 5,000 seeds per oz.