Watercress can be grown in spring, summer and fall, with relatively low temperatures in winter. If you want to plant it, you must control the temperature so that you can plant it in a greenhouse, but the survival rate is not particularly high. Spring can be planted in March, but according to the different temperatures in different areas to decide. Growing watercress in the summer requires good water control. The first thing you need to do is to prepare the ground and fertilize the soil, which must be fertile and contain organic matter. Of course, it is also necessary to fertilize the watercress properly, so that the nutrients in the soil are more sufficient to meet the growth of watercress. Then we choose good seeds for germination, and choose seeds that are robust, so that the survival rate is higher. Watercress is suitable for growth in fertile soil, clay soil is very good, watercress is suitable for growth in a sunny environment, can better photosynthesis, but the sunlight can not be too strong, easy to affect the leaves of watercress, burn the leaves of the plant.

Watercress has high soil requirements, suitable for growing in fertile and moist soil. Sowing soil can choose rice soil or swamp soil, which is more suitable. It is better to soak the seeds in water for 24 hours before sowing. The seeds of watercress are hard, which can speed up the germination of the seeds. After that, you need to remove the seeds from the soil, wrap them in gauze and put them in the refrigerator to accelerate germination. After the seeds turn white, they can be sown. When sowing, you can lose 2 ~ 3 seeds per pit. After sowing, you need to cover the seeds with a layer of soil, which should not be too thick. This is done to keep warm and waterproof. After the seeds have germinated, urea and ammonium sulfate should be applied appropriately, and it is best to use the right amount of diluted fertilizer before fertilizing the plants each time to radically reduce the probability of fertilizer damage.

When watercress is a fertilizer-loving plant, it is best to apply diluted fertilizer to the plant once a week in the later planting, and the amount of fertilizer applied each time should not be too much. From sowing to seedling rooting, the field should be kept moist to facilitate rooting. After rooting, the water layer gradually deepens, and the upper part of the plant is about 18cm above the water surface. this can promote the plant to grow taller, increase the yield, keep the stem white and improve the quality. When the temperature drops to 0℃, the water layer deepens to 40 ~ 60 cm, and only a few leaf tips remain above the water surface. Twenty days after the planting of watercress is the period of rapid growth of watercress. Therefore, artificial weeding should be carried out in a timely and effective manner to prevent weeds from competing with watercress for fertilizer.