The Best Open Pollinated baby pac choy out there. Dark green, spoon-shaped leaves with wide, light green midribs and mild flavor. Shanghai forms densely packed, vase-like heads. Plants can be spaced closely for baby choy, which is in demand with top Asian chefs for its tenderness and mild flavor. Uniform shape • 5-6” tall. (B. rapa). Maturity 25 days baby/45 days full size.