1, planting time

Generally speaking, spring is mainly planted in March-April and harvested in June-July. It can also be planted in autumn from September to June at 65438+1October, and harvested in April to May of the following year, but it is mainly planted in spring.

2. Growth temperature of onion

The temperature of onion should be determined according to its growth habit as far as possible. Because onions like to be cool and cool, the suitable temperature is basically around 12 to 22 degrees, which should not be too high. Because too high a temperature will lead to slow growth of onions, many farmers' friends say that their onions are not long or grow slowly, and a few factors are caused by temperature.

3, onion watering skills

Proper watering is enough for onion planting, and the amount of watering should not be too large or there is water accumulation, because too much water will cause the root of onion to rot, so according to the characteristics of onion drought and waterlogging tolerance, proper watering is enough, and dry soil watering is enough. Irrigation of onions in large quantities is not recommended.

4. Soil selection of onion

Onion planting, it is best to choose fertile, loose, strong drainage and deep soil. For the soil with too high alkalinity, it should be neutralized with acid and alkali before planting, because the soil with high alkalinity will affect the growth and development of onions, and the soil with ph value of 6.0 to 7.0 is the best.

5, onion fertilization management method

For onion fertilization, phosphorus fertilizer should be supplemented in time at seedling stage, and nitrogen and potassium fertilizer should be supplemented mainly in onion growth period, and then trace elements should be supplemented appropriately. In different growth periods, nitrogen, phosphorus and potassium fertilizer should be supplemented mainly, combined with onion's nutritional needs and trace elements, which is more conducive to the growth and yield increase of chopped green onion.

6. Harvest management

Onion is a vegetable that can be cut and harvested like leek, but it is not perennial, but biennial. Even so, it can be harvested every other month. Here, we must be careful not to harvest every 65,438+00 days because it can be cut and harvested. If the time is too short, it will lead to the failure of onion vegetative roots. It is best to harvest once a month.