300 Gourmet Purple Hybrid Pak Choi Seeds - Bok Choi Brassica rapa Chinensis This Gourmet Pak Choi Hybrid has deep, dark purple top leaf and green with purple veins under leaf and green petioles. A uniform and easy to grow plant that is tender, mildly flavored, and can be harvested at any stage, microgreens, baby leaf or whole plants at full maturity. Produces nice color under warm and cool temperatures. This variety has the most intense purple color of all purple choi. Cultivation: 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 60sF. Exposure to frost or prolonged temperatures below 50F may result in bolting. Mulch fall crops to avoid premature bolting. Most vegetables leave having purple color is called “anthocyan” which is generally developed by lower temperature. Growing temperatures 50-60F should be adequate to develop “anthocyan” after the seeds have germinated. We cannot tell exactly how long exposure should be under low temperatures. The grower should trial different methods and observe how the plant reacts.