How to grow coriander in greenhouse

First, sowing coriander is usually sown from late October to early December. Before emergence of coriander after sowing, a good weed control effect can be obtained by using 25% herbicide wettable powder per mu, or 50% herbicide wettable powder 100g to 200g, 75 to 90kg of water, stirring evenly and spraying border surface. Second, manage the emergence of parsley about 8 days after sowing, the seedling emergence temperature should be higher, keep 20 degrees Celsius to 25 degrees Celsius during the day and 10 degrees Celsius to 15 degrees Celsius at night. Maintain 17 degrees Celsius to 20 degrees Celsius during the day and 10 degrees Celsius at night after emergence. The daytime temperature is over 25 degrees Celsius and stops when it drops to 20 degrees Celsius. When the seedling height is 4 to 5 cm, the plant spacing is maintained at 2 to 3 cm. Coriander seedling stage is generally not watered, seedling height of about 10 cm into the heyday of life, you can choose sunny morning watering and fertilization, 10 to 15 kg of ammonium sulfate per mu or 5 to 10 kg of ammonium nitrate. During the growing period, topdressing should be applied once and watering for 2 to 3 times. Coriander grows fast and can be harvested 30 to 50 days after sowing and when the plant is about 20 cm high. Third, the prevention and control of parsley pests are mainly aphids and ground tigers. 50% aldicarb or 50% aphid spray wettable powder 2000 to 3000 times solution was used to control aphids, sprayed once every 6 to 7 days for 2 to 3 consecutive times.