Soak the seeds in 1% potassium permanganate solution for 15 minutes or in 10% carbendazim wettable powder solution for 30 minutes, take them out and clean them, and then germinate at 20-25℃.

Folding variety selection

There are big leaf varieties and small leaf varieties of coriander. Although the yield of small-leaf varieties is not as high as that of large-leaf varieties, they have strong fragrance, cold tolerance and strong adaptability, so many small-leaf varieties are generally cultivated.

Folding soil preparation and fertilization

Choose plots with loose soil, rich organic matter and convenient irrigation and drainage. After the previous crop is harvested, turn the soil to the depth of 15-20cm in time, let it be exposed to the sun for more than 2 weeks, and then apply 4000-5000kg of decomposed high-quality farm manure and compound fertilizer 10- 15kg as base fertilizer per mu. The boundary needs fine, loose and flat soil. If drilling is used, a sowing ditch with a width of 4-5 cm and a depth of about 2 cm should be opened at the border according to the row spacing of 8- 10 cm to prepare for sowing.

Folding sowing

Sowing can be done at any time from late August to early April of the following spring. Knead the seeds before sowing, then put them in hot water of 50-55℃ and stir for 20 minutes. When the water temperature drops to about 30℃, continue to soak the seeds./kloc-sow after 0/8-20 hours, or sow after accelerating germination. Generally, 2-3 kilograms of dry seeds are sown per mu.

Folding water and fertilizer management

Coriander likes to be wet, so it should be watered frequently to keep the edges moist. Furrow irrigation can also be carried out in time when the soil is slightly dry, but after the border soil is wet, the accumulated water in the field ditch should be drained in time to avoid affecting plant growth.

Folding lamp temperature requirements

Light and temperature requirements

Coriander can tolerate the low temperature of-1 to -2 degrees, and the optimum growth temperature is 17-20 degrees. It grows slowly when it exceeds 20 degrees, and stops growing when it exceeds 30 degrees. Like light, but also resistant to yin. If the shade is about 50% in autumn, the leaves are often sprayed with water and fog, and the transverse arch film or greenhouse is used for insulation in winter and early spring, which can improve the yield and quality.

Folding harvest

Coriander can be harvested 6-9 weeks after sowing. When harvesting, the roots are dug out to remove soil, old yellow leaves and other impurities. After washing, coriander is tied up for sale. The average yield per mu is 1000-2500 kg, and the high yield can reach more than 3000 kg.

Folding planting

1. Lay a layer of soil on the finished plastic bottle (the covered part). The soil should be fertile and loose, which is conducive to the growth of coriander. Coriander is a shallow-rooted vegetable with short growth period, strong taproot, weak bud and strong fertilizer absorption ability, which is doubtful. Therefore, we must choose loam with good drainage, fertility and looseness, and water and fertilizer conservation.

2. Start sowing, then press and water by hand to keep the soil moist, so as to facilitate the emergence of coriander seeds.

3. During seedling growth, it is necessary to observe the growth of coriander seedlings regularly, because coriander is not drought-tolerant. If there is soil hardening, it means that it is necessary to loosen the soil and water it in time to ensure sudden wetting.

4. It's time to harvest! Go harvest coriander.

Method for plan coriander after autumn harvest

The planting method of organic coriander after beginning of autumn is related to the yield of coriander, and the cultivation of organic coriander should be three-proof.

Prevent bolt connection. Organic coriander planted in summer and autumn will not be bolting because of low temperature at seedling stage, but will be bolting because of long sunshine (conditions) in summer and autumn, so it is necessary to choose bolting-resistant coriander varieties in production. In addition, strengthening fertilizer and water management (lightly topdressing seedling fertilizer when watering) can reduce bolting.

Prevent "red stalks". Coriander "red stalk", that is, the stem and leaf of coriander change from green to red, which reduces the commodity value of coriander and reduces the purchase price by half. In summer and autumn, the stems and leaves of coriander planted in the open field will turn red due to strong light, especially when the seedlings are too late (the plant height is more than 8 cm). In order to prevent the "red stalk" of coriander, first, the seedlings should be interplanted early, and a new high-fat film should not be sprayed every seedling. In production, it is advisable to grow seedlings to 3 cm high and keep the spacing between seedlings at about 2 cm. The second is to cover the sunshade net. Conditional farmers can build a shed with a height of 80 ~ 100 cm after sowing, and the shed is covered with a sunshade net.

Rain proof. There is more rain in summer and autumn, which is very harmful to the newly emerged coriander seedlings. After the heavy rain, it suddenly turns fine, which easily leads to the rotten heart of coriander. After the rain, the well water should be lightly watered once, and the amount should not flood the seedlings. Spraying a new high-fat film can prevent coriander from rotting

Three defenses are the key to organic coriander planting methods. In addition, the new high-fat film of vegetables should be used in time during the three defenses, so that the plants are stout, the leaves are thick, the leaves are fresh and tender, the plants are lush and the natural taste is strong. At the same time, it can improve the ability to resist disasters.