Planting time: the temperature of seed germination needs to be above 65438 05℃, which is usually planted in April-July in the south and June-August in the north. Planting method: soak the seeds in warm water for a period of time before sowing and stir them to avoid scalding the seeds. When sowing, you can sow by sowing or drilling. After sowing, cover it with a layer of fine soil and water it to keep the humidity. Water spinach has a great demand for fertilizer and water, so it should be watered frequently. Nitrogen fertilizer is the main fertilizer.

First, the time and method of open-air cultivation of water spinach

1, planting time

Water spinach is suitable for planting in sunny, high temperature and high humidity environment, and the temperature of seed germination needs to be above 65438 05℃, so it is usually planted in April-July in the south, and the temperature in the north is relatively low, usually in June-August.

2. Planting method

(1) Environmental requirements

Water spinach is not strict with soil, but it likes sticky and fertile soil and high temperature and high humidity environment. It can withstand the high temperature of 35-40℃. The optimum growth temperature is 25-30℃. Water spinach is not cold-tolerant, its stems and leaves will die when it encounters frost, and its growth will stop below 10℃. The environment is too dry, the fiber increases, the stems are thick and old, and the eating feeling decreases.

(2) sowing

① The seed epidermis of Ipomoea aquatica is thick and hard. If you sow directly, the germination will be slow, which will affect the planting cycle. If it rains for a long time, it may lead to seed rot.

(2) Before sowing, soak the seeds in warm water at 50-60℃ 15-30 minutes, stir to avoid scalding the seeds, then soak them in clear water for one day, then put them in a greenhouse to accelerate germination, wash them once a day until a large area begins to turn white, and then sow.

(3) Seeding or drilling can be carried out, and the amount of seeds used per mu is about 2 kg. After sowing, cover with a layer of fine soil and water it to keep the soil moisture.

(3) Site management

① The growth of water spinach has a great demand for fertilizer and water. In addition to applying sufficient fertilizer when planting, when it grows to 5 cm, it should be watered and fertilized to make it grow rapidly, and then watered frequently to keep the soil moist.

(2) Fertilize it in time after harvest to make it grow again. Nitrogen fertilizer is the main fertilizer. In addition, although water spinach can be planted to a certain density, it is planted too densely, which makes it unable to accept the light and may rot.

Second, the types of water spinach

1, water spinach with willow leaves

The most common kind of water spinach has slender leaves, like willow, few leaves and green and thin stems. Mainly eat the top buds, the taste is not crisp, but the buds are rich in aroma.

2. Water spinach with white stems and willow leaves

This variety has white and thick stems, few leaves and less fiber content, so the stems are tender and can be fried with leaves, and the taste is crisp and tender.

3. Water spinach with white stems and big leaves

The varieties introduced from Hong Kong have white stems, crisp taste, soft texture, less fiber and larger leaves.

4. Water spinach with green stems and big leaves

The stem of this variety is green, thick, leafy and wide. Most of its leaves, tender stems and buds can be eaten, and its taste is fragrant and rich.