40-45 Days to maturity. Brassica rapa Chinensis group. Dwarf White Stem, Pak Choi (Bok Choy) Seeds. Non-GMO Annual, Heirloom. This ‘Baby Bok Choy’, is the famous Asian green. It grows in a cool-warm season. It is often referred to as a nai pe tsai type or dwarf type with white spoon-shaped petioles and dark green, glossy leaves. This variety grows best in mild climates and can tolerate heat. It can be grown year-round in sub-tropical areas. ~ 10,000 seeds per oz.