How to plant water spinach seeds? Before and after Tomb-Sweeping Day, after the 15th day of the first month in the greenhouse, you can sow a plant with 3 seeds covered with plastic film in the prepared field, with the plant spacing of 1 ft and the row spacing of 1 ft. When you grow up, you can't pinch your tips to cook, let it grow until the fruit is ripe, and keep the harvested seeds in a cool and ventilated place to prevent it from getting wet. Except for the water spinach with seeds, others can be used by pinching tips in batches.