1, Time: It is best to sow in early September every year, because the temperature at this time is conducive to the emergence of seeds.
2. Seed selection: select healthy and full onion bulbs, soak them in hot water for 3-4 hours, and then take them out to dry.
3. Soil: Choose loose, fertile and well-drained soil.
4. Sowing: Plant the treated onion bulbs in the soil, cover with a thin layer of soil, compact the soil and then water it.
Growth habit of onion
1. Temperature: Onions are cold-resistant and heat-resistant, and have strong adaptability to temperature conditions. The suitable temperature for growth is 65438 03 ~ 26℃. Low temperature will affect the physiological function of seeds and hinder germination. If the temperature is too high, the seeds will not germinate.
2. Moisture: Onion has shallow roots, likes humidity but is not drought-tolerant, has weak water absorption capacity, and likes high soil moisture. Before harvest, the watering amount should be controlled at 12 weeks, so as to ensure the bulb to accelerate maturity and prevent the bulb from cracking.
3. Illumination: Onion is a long-day crop. Under the condition of moderate light, it can meet the needs of flower bud differentiation, vegetative growth and bulb formation in the growth process. If the sunshine is insufficient, the yield and quality of onion will be seriously affected. Suitable sunshine conditions can effectively promote the formation and maturity of bulbs, achieve high-quality production and increase income.