Cabbage Seeds - Pak Choi - Nabai Spring - Hybrid -1 g Packet ~144 Seeds - Brassica rapa Chinensis group Non-GMO -- F1 Hybrid -- Asian Variety -- High Germination Rate Seeds For: Vegetable Gardening Days to Full Maturity: 45-50 -- 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 - Nabai Spring - Hybrid. Non-GMO. Annual. Brassica rapa Chinensis group. 45-50 days. Cool-warm season. This is a dwarf or baby pak choi type. It grows 4-6" tall, short, compact with nice shape. Leaves are dark green with pure white petioles. Tolerant to cold and heat, slow bolting. Resistant to disease. Can be planted in spring, summer and fall. Prepare fertile, well-drained soil. Sow seeds in spring after last frost to early summer or late summer/early fall. Keep soil moist. Fertilize as needed. Optimum growing temperatures are in the 60s°F. Exposure to frost or prolonged temperatures below 50°F may result in bolting. Mulch fall crops to avoid premature bolting. Use in stir-fries, saute, or braise. ~4000 seeds / oz.