Chinese Spinach Amaranthus - Xotica Collection. You can cook or stir-fry the amaranth. The taste resembles spinach but a little more delicate. The young stems are also edible. Sow from March to end of July in open ground. Plant out 25 cm apart, with 5 cm between rows. Harvest when the amaranth is 25 cm high, by cutting just above the ground. Let the plant re-grow, as is can be harvested several times.