1, soil: Onions have a great demand for soil with good air permeability and good drainage. The heavy soil in the vegetable field at home is more suitable for planting, which can make onions absorb and grow better.

2. Moisture: I prefer wet to dry, but I also have a high demand for water. The amount of water should not be too much, the soil layer should not be too wet, just a little wet, and the amount of water must be controlled well.

3. Nutrients: Compost can be used when fertilizing. When applying fertilizer, it is not appropriate to directly sprinkle fertilizer on the roots of shallots, which will burn the roots, but should be scattered on the soil far away from shallots and turned evenly.

4. Temperature: Its growth temperature is about 10 to 25 degrees Celsius, and it likes a refreshing environment. Shade when it is hot in summer to avoid the influence of high temperature on growth.

Second, feeding skills

1. Pruning: After a period of cultivation, the tip of onion will turn yellow. At this time, trim it with small scissors to avoid all the tips from turning yellow. When it is long enough to eat, cut off the top and eat it, leaving about three centimeters of onion below, and it can continue to grow.

2, breeding: sowing and breeding is enough, first turn over the soil and then spread the seeds evenly on the soil. Sprinkle another centimeter of soil on it, and then cover it with plastic film to keep warm. After about 30 days, you will see the buds grow out.

Third, the problem diagnosis and treatment

1. Leaf blight: The common disease of cultivated shallots is leaf blight, and the leaves of shallots are susceptible to diseases. If it is not prevented in time, the leaves will dry up and die, and spraying carbendazim after dilution can have a good therapeutic effect.

2, rotten roots: too much water, the soil layer is too wet, which will lead to the root rot. At ordinary times, we should pay attention to controlling water quantity to avoid root rot.

Four. Other issues

1. How to store: Picked shallots will rot in a few days if they are not stored properly. Dig a deep pit and plant shallots in bundles. This is the same as replanting, which can avoid corruption and deterioration. Just pull one or two when eating.

2. Edible: edible, spicy, onion-flavored, and can be used as seasoning.