Cabbage Seeds - Pak Choi - Hotau Improved - Hybrid. Non-GMO. Annual. Brassica rapa Chinensis group. 30-40 days. Cool-warm season. This is a mini type pak choi that you see in stores. Plants uniformly grow 3-4" tall, wide and big petioles. Fast growing, very slow bolting and heat tolerant. Can be planted in late spring, summer and fall. Recommended variety for minim pak choi production. ~ 6,000 seeds per oz.