Cilantro Cultivation Techniques and Precautions for Over-Summering
What should be noted when growing over-summering cilantro? Please provide guidance. When growing over-summering cilantro, note the following points for reference: 1. Select superior varieties. Choose varieties that are drought-tolerant, fast-growing, and not prone to bolting, such as Beijing cilantro, American large-leaf cilantro, Thai heat-tolerant large-grain cilantro, etc. 2. Seed treatment. Summer temperatures...
What should be noted when growing over-summering cilantro? Please provide guidance.
When growing over-summering cilantro, note the following points for reference:
1. Select superior varieties. Choose varieties that are drought-tolerant, fast-growing, and not prone to bolting, such as Beijing cilantro, American large-leaf cilantro, Thai heat-tolerant large-grain cilantro, etc.
2. Seed treatment. Summer temperatures are high, and moisture in the soil evaporates quickly. To achieve early and complete sprouting, treat the seeds before sowing: first crush the fruit coat, then soak the seeds to promote germination. Soak the seeds in cool water for 4-5 hours, place them in a cotton bag, and keep them in a dark, damp environment at about 15°C for 7 days to promote germination (such as in a cellar or clay jar). Sow once the seeds show white sprouts.
3. Soil preparation and fertilization. Choose loamy soil that is fertile, retains water and nutrients, is convenient for irrigation and drainage, and has good ventilation; preferably a plot where cilantro has not been grown for 3 years. Apply 3000 kg of farmyard manure and 30 kg of high-nitrogen compound fertilizer per mu. Spread the fertilizer evenly, rotary till, and make flat beds 5-6 m long ready for sowing.
4. Fine sowing. In production, the broadcasting method is commonly used, with a seeding rate of 3 kg per mu. Before sowing, water the bed thoroughly; after the water seeps in, mix the seeds with sand evenly and broadcast them uniformly, then cover with 1-2 cm of fine sandy soil. After all sowing is complete, press once with a large hoe. Cover the surface with old straw mats, rice straw, or other coverings, which can help preserve moisture and lower temperature. Generally, seedlings emerge completely about 7 days after sowing; remove the covering when most seedlings have emerged.
5. Field management. Cilantro fears high temperatures and strong light. Where conditions permit, consider covering the cultivation beds with shade nets to reduce temperature and block light, which helps cilantro grow normally, increases yield, improves quality, and raises planting efficiency. If no closed herbicide has been applied, combine seedling-stage cultivation and hoeing to promptly remove weeds in the field and prevent them from competing with cilantro for fertilizer and water. The principle of fertilizer and water management during the cilantro growing period is not to water unless dry; water less at the seedling stage, and maintain sufficient water and fertilizer supply during the vigorous growth period. Topdressing depends on soil fertility; combined with watering, mainly apply urea or nitrogen-potassium fertilizer, generally 15 kg each time, and two topdressings are appropriate.
6. Pest control. The main pest of over-summering cilantro is aphids, which occur very commonly under high-temperature and drought conditions, generally sucking the sap of cilantro leaves and causing reduced yield. For control, spray with 10% imidacloprid at 800 times dilution, spraying once every 7 days, for 2-3 consecutive applications.
7. Harvest at the appropriate time. Over-summering cilantro grows relatively quickly. Harvest early those that meet the harvest standard to prevent bolting. Harvesting can begin when the plants reach 20-25 cm in height. To improve marketability, harvest by cutting generally after 6 p.m. or in the early morning. After harvesting, pack the cilantro in baskets and promptly sell it at vegetable markets or fairs.
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