Cabbage Seeds - Pak Choi - QD-2 Express - Hybrid -1 Oz ~10000 Seeds - Brassica pekinensis Non-GMO -- F1 Hybrid -- Asian Variety -- High Germination Rate Seeds For: Vegetable Gardening Days to Full Maturity: 50 -- Annual -- USDA Hardiness Zone: Annual Crop, Not Intended To Overwinter Kitazawa Seed Company Brand - Premium Quality Asian Variety Garden Seeds & More - Since 1917 Cabbage Seeds - Pak Choi - QD-2 Express - Hybrid. Annual. Brassica pekinensis. 30~35 days as baby Taiwan Pak Choy. 50 days as Wa Wa Tsai. NonGMO. Open pollinated. Light green eaves, hairless, with pure white petioles. Yellowish interior, tender and sweet. Tolerant to cold and heat, slow bolting. Can be planted in late spring, summer and fall. Approximately 10000 seeds per ounce.