Before planting coriander, do the work of sowing and raising seedlings. After the coriander is planted, the outer skin of the seeds is rubbed open, and then the seeds are placed in the pot soil that has been watered enough, and the seeds will begin to germinate in about a week. After germination, the seeds can be transplanted into the prepared pastoral land.
During the growth process of coriander, a suitable growth temperature is required. Generally, the temperature at which coriander can grow and develop normally is about 16-18 degrees. This temperature is when the growth and development of coriander is the fastest. If it is planted in summer, pay attention to cooling the seeds, as the temperature is too high for the growth of coriander.
If the base fertilizer is sufficient, try not to top-dress, but if the base fertilizer is insufficient, it should be top-dressed outside the roots about ten days before harvest, and urea can be sprayed twice. Then spray the fully decomposed farmyard manure every 15 days. If you save the seeds for the next time, you can also apply a little phosphorus fertilizer to it.
Before setting the coriander seedlings, try not to water, because this can help control the up and down, and squat the seedlings and strengthen the roots. After the seedlings are settled, you can start fertilizing them. First, apply water to stabilize the seedlings immediately after planting, and the amount of water should not submerge the seedlings. Then as the seedlings grow, the water requirements will increase, and the frequency of watering will gradually increase.
Generally, it is about seven times of shallow water during the growth period. The interval should not exceed ten days. When watering for the fourth time, shorten the watering interval to once a week, keep the soil moist, control the amount of watering before harvesting, and mainly use shallow water.
Due to its own particularity, coriander has a relatively strong resistance to diseases, and fewer diseases occur. However, because most of the coriander is planted in the open air, and summer is also a period of high incidence of insect pests, so in summer and autumn, we should pay attention to the prevention and control of insect pests, and use agents such as emamectin or Caixi suspending agent for spraying prevention, once a week. Can. Although there are fewer diseases, we cannot relax our vigilance, strengthen the management of vegetable gardens, carry out disinfection, and focus on treating diseased and residual branches to reduce pathogens.