Amsoi Green Mung Choi - Xotica Collection. The thinned seedlings (Brassica juncea var. rugosa)are delicious and you can take several cuttings from each plant. Use in salads and stir-fries. Sow under glass from March to September or outdoors from mid July to the beginning of September. Sow in rows 25 cm apart and thin out with spacing of 20 cm between plants.