How to grow onions in autumn

How to grow onions in autumn? Please introduce the method of planting onions in autumn. You can refer to the following methods: sowing at the right time. If you sow too early, the seedlings will flourish before winter, which is easy to cause early bolting, but too late is not conducive to the overwintering of seedlings. It is generally best to sow seeds in mid-September, no earlier than September 1 at the earliest, and no later than October 5 at the latest. Planting at the right time. Those suitable for sowing are generally planted in the first and middle of November, no later than November 25 at the latest, and the daily average temperature is about 10 ℃. At this time, the stem base of the seedling is 0.5 cm thick, the true leaves are 3-4 pieces, and the seedling age is 40-50 days. 3-4 new roots can grow before the soil is frozen, which is beneficial to survive the winter safely. Field management. Before planting, it is necessary to do a good job in the cultivation of strong seedlings and the control of underground insect pests, and control watering and fertilization. If the seedlings turn yellow, 0.3% urea solution can be sprayed on the leaves. It is necessary to pour enough overwintering water before freezing and turn green once after turning green. After the leaves enter the vigorous growth period, 15 kg of urea is applied per mu. 50 days after turning green, before bulb expansion, 10 kg of urea and 15 kg of potassium sulfate were applied per mu. If bolting plants are found, the flowers can be split from the middle to promote bulb expansion. Click to get more onion planting techniques click to get more vegetable planting techniques