Watercress planting techniques are as follows:

1, planting time

Watercress planting time varies in different areas, the Yangtze River basin in August-September planting. South China in early September to the following year in February planting, to November and December suitable. North China is planted after the final frost.

2, fertilization of the ground

7-10 days before sowing, per mu of high-quality organic fertilizer 2000-2500 kg or cake fertilizer 100-150 kg or more, and then deep plowing on the water compost. The more times you plow and turn over, the deeper you turn over, the longer the composting time, the easier it is to get a high yield. In the latter ploughing and tilling the land when mu applied three elements of compound fertilizer more than 50-75 kg, to achieve the field leveling.

3, sprouting seedlings

Pick the side buds full of mother stem bundled into bundles, cross pile in a cool ventilated place, the pile height is less than 60 centimeters, covered with wet grass, and morning and evening watering to keep wet, 10 days or so after the section of the rooting of planting.

4, paddy field cultivation

Planting irrigation should be shallow to keep the soil moist can be. When the temperature is high, in order to prevent the seedlings from drying out, irrigation should be deep, coastal areas after planting in case of typhoon, we must immediately irrigate the deep water, in order to submerge the seedlings to the degree. About 1 month after planting, the plant is about 15 cm high, the depth of irrigation should be less than half of the plant. Later with the growth of the plant and raise the water level, generally kept in the plant below the heart leaf.

Winter irrigation depth to keep more than half of the plant submerged in water is appropriate. Winter water surface freezing area, before evening should be filled to the water level to the tip of the leaf 3-4 cm. The following spring the temperature rises, also need to gradually drainage, water level down to 15-20 cm.

5, fertilizer

When the seedlings grow to 2-3 leaves, the beginning of the fertilizer, to promote the plant as soon as possible, and then every 7-10 days of fertilizer, each time with 10-15 kg per mu urea.

6, plowing weed

Watercress pre-growth, to remove weeds in a timely manner, pulled weeds can be stuffed into the soil back to the field. After the watercress closed the line, the weeds will not be easy to grow.

7, pest control

Watercress pests are mainly aphids and watercress weaver. The simple control method is to flood the field with deep water, submerge the plants so that the pests float on the water surface and concentrate on removing them. Diseases are mainly rust and spotted wilt. Rust disease early in the onset of timely spraying 15% powder rust Ning wettable powder 2000 times or 64% kill alum wettable powder 400-500 times dilution, every 10-20 days 1 time, continuous control 2-3 times.

Spot blight can be sprayed with 65% zinc diclofenac wettable powder 800 times or 75% chlorothalonil wettable powder 600 times diluted solution to prevent and control, 1 time every 10-15 days, 2-3 times in a row, 2 weeks before the harvest to stop.