How to grow onion and how long it takes

Planting time: sowing from March to April in spring or from September to October in autumn. Land selection and land preparation: planting in the soil with good water and fertilizer conservation, about 1500 jin of farm manure and 120 jin of nitrogen, phosphorus and potassium compound fertilizer can be applied per mu. Seed selection treatment: select high-quality varieties and soak the seeds with 50 ℃ of hot water for disinfection. Sow seeds at the right time: sow about 6 grams of seeds in an one-square-meter seedbed. Late management: watering according to soil moisture and topdressing every 30 days.

First, planting time

Spring onion seeds can be sown from March to April in spring or from September to October in autumn. the suitable germination temperature for spring onion seeds is about 13-20 ℃. Before sowing, the seeds should be watered thoroughly, and then the spring onion seeds should be sowed directly on the soil surface.

II. Land selection and preparation

The main results are as follows: 1. Spring onion seeds are cold-resistant and heat-resistant, but not drought-resistant, so the planting land should be planted in the soil with good performance of water and fertilizer conservation, and semi-shady sand loam can be selected at the same time. The plot should be convenient for irrigation and should not be planted in areas with serious pesticide pollution.

2. About 1500 jin of farm manure and 120 jin of nitrogen, phosphorus and potassium compound fertilizer can be applied per mu of planting land. First of all, fertilizer should be applied in the 30cm, and then all the soil should be rotated to form a 1.3m wide seedbed, and the field should also be ploughed.

3. Seed selection and treatment

1. It is suitable to choose the variety with purple or white flowers. This kind of variety with strong fragrance has high economic value. Now there are Sichuan chives and four seasons rice scallions.

2. To deal with the seeds before sowing, you can generally soak the seeds in hot water of 50 ℃ for about 2 minutes, stirring constantly in the middle, so that you can disinfect and sterilize, and then fish out and clean the seeds, then you can drain and sow the seeds without accelerating germination. As long as the temperature is suitable, it is easier to germinate.

Fourth, sow seeds at the right time

1. Generally sow 6g seeds in an one-square-meter seedbed, and then turn the soil for about 1-2cm. After being watered thoroughly, it will begin to sprout after two weeks. After covering the soil, the seeds need to be watered to combine the seeds with the soil, and then they can be covered with straw and straw for heat preservation and moisturization. If the cover is too much, diseases are easy to occur.

2. After emergence, the weakly diseased seedlings and underdeveloped seedlings were selected, and then the whisker roots were cut and planted in the field, according to the plant spacing of 8-10cm, the row spacing of 15-20cm, the hole planting of about 3 plants, and the planting depth of 3-4cm.

V. late-stage management

The main results are as follows: 1. Because there is no root system after planting, it needs to be watered once a day, which is beneficial to improve the survival rate of seedlings. Some roots will grow in about a week, and they can be irrigated once every 3 days to promote seedlings to take root and sprout.

2. when the slow seedling grows normally and the root system is normal in about 15 days, it can be watered according to the dry humidity of the soil. Topdressing can be carried out once about 30 days after planting, combined with watering and fertilization, and then again every 30 days.