1, site selection. Cabbage likes cold and cool, is not heat-resistant and suitable for water. In summer, it can be planted out of season or at low altitude, but it must be planted in a place with cold running water underground, and the water temperature (field water temperature) should not exceed XT at the highest, or in a cool place with high altitude (more than 500 meters), and there should be cold water sources nearby.

2. transplantation. For off-season cultivation in summer, seedlings and cuttings are generally transplanted at the beginning of May, working rows are reserved every 3.3 meters, and deep ditches are opened around the fields to facilitate irrigation. Planting row spacing 10- 13cm, plant spacing is about 7cm. When planting, put the tender stems on the field surface, and let several bases stick in the soil, then the roots can grow.

3. On-site management. The water temperature should be controlled within the range of 18-22℃. If the temperature is too high and the growth is not good, the leaves of watercress will turn yellow Choose to apply quick-acting fertilizer on cloudy days or in the afternoon, block the surrounding water inlets without releasing water, or leave a small amount of running water, and apply about 5 kilograms of compound fertilizer per mu.

4, pest control: pay attention to timely inspection, timely prevention.

5. Harvest. Harvest watercress should be carried out in the evening or cloudy morning to avoid sunlight. The recovery standard should be determined according to the requirements of domestic sales or export. Stack bamboo baskets layer by layer, leaving ice cubes in the middle and ice cubes on top. Try to sell early in the evening. Fertilize after each harvest to promote its re-growth. Generally, a large number of harvests begin in mid-June and end on 10 in late June. The yield per mu is 2500-3500 kg, and the high yield can reach 5000 kg if the harvest time is long.