1, soaking seeds to accelerate germination. Because of the high temperature in summer and the rapid evaporation of water in the soil, in order to ensure the uniform and rapid emergence of seedlings, the seeds of coriander should be soaked and germinated before sowing, and the seeds should be rubbed off first to separate two seeds in the fruit. Then soak it in clean water for 4-5 hours, put it in a cloth bag and put it at room temperature for moisturizing and germination, and soak it with water every 2-3 days. Generally, after about 10 days, the young roots can be taken out and sown when they are exposed.

2. Live broadcast in due course. Coriander likes to be cold and cool, and its growth temperature is suitable 17-20℃. The sowing date of planting coriander in summer is not strict, and the suitable sowing date is usually from late April to early June, and a batch is usually sown every 5-7 days. Harvest 40-50 days after sowing.

3. Soil preparation and fertilization. Choose loam land with fertile soil, water and fertilizer conservation, convenient irrigation and drainage, and good ventilation, preferably land that has not been planted with coriander for 3 years. The plots with high organic matter content are more suitable for the growth of coriander, so 3000 kilograms of farmyard manure and 30 kilograms of high-nitrogen ternary compound fertilizer are generally applied per mu, and the fertilizers are spread evenly, and the land is rotated to make a flat bed with a growth of 5-6 meters to be sown.

4. Fine sowing. In summer, it is better to plant coriander evenly. Generally, about 2 kilograms of coriander is planted per mu. The sowing method is "sow two beds first and leave one bed". Place the mulch soil on the two sides of the reserved border, then fill it with water, sow it evenly after water infiltration, cover the soil with 2 cm after sowing, and then sow the left empty border in the same way as sowing first. After sowing, pat the seeds lightly, cover the grass with moisture, and help the seedlings to be unearthed. When most of the seedlings are unearthed, the mulch should be removed. Generally, seedlings emerge about 7- 10 days after sowing. After all the broadcasts, conduct a suppression to preserve soil moisture. If the weather is dry and the soil humidity is low, it will affect the emergence of seedlings, and it can be watered once with small water.

5. Field management: Coriander is afraid of high temperature and strong light. Where conditions permit, it can be considered to cover the cultivation bed with a sunshade net to cool down and shade the light, which is beneficial to the growth of Coriander, increase yield, improve quality and improve planting efficiency. In the field without closed herbicide, combine intertillage and hoeing at seedling stage, and remove weeds in the field in time to prevent competition with coriander for fertilizer and water. The principle of fertilizer and water management during the growth period of coriander is no drought and no watering, less watering at seedling stage, and sufficient water and fertilizer supply during the peak growth period to keep the soil moist frequently. Topdressing depends on the level of soil fertility, combined with watering, mainly topdressing urea or nitrogen and potassium fertilizer, generally applying fertilizer 15 kg each time and topdressing twice.