Small onions are hardy and heat resistant, but not drought resistant, so the planting place should choose the soil with good water and fertilizer retention performance, in addition, you can also choose sandy loam, require to receive sunlight but not long time direct sunlight on the slopes. Be in a location with a good water source and easy access to irrigation. Do not plant in a place that is heavily contaminated with pesticides. Planting field one acre to apply 1500 pounds of farmyard manure, and about 120 pounds of nitrogen, phosphorus and potassium compound fertilizer. First turn the ground within 30 centimeters of fertilizer, cultivate the soil to cover more than 10 centimeters of fine soil, all the soil rotary tillage, leveling the land, build 1.3 meters wide seedbed, the big field should also be organized.
1, planting soil
Red head onions are suitable for growth in the organic matter content is rich, better drainage of the soil, planting can be used when the micronutrient content is more rich, the soil is more loose humus or garden soil, in the planting before you can add nitrogen fertilizer, organic fertilizers to the soil, to improve the soil's fertilizer content.
2, planting method
In planting red head onions, you can select the surface smooth, healthy growth of onion seeds for planting, in the process of planting, you need to dig out a soil trench in the soil, and then the tip of the onion seeds up, placed in the soil, and the use of fine soil cover can be. In the process of covering, you need to let the tip of the onion exposed to the surface of the soil.
3, notes
When planting red onions, you need to pay attention to the planting depth, it is best to control the depth of two-thirds of the onion head, so as not to plant too deep, resulting in onion seed rot, can not grow. When planting also need to pay attention to the density, it is best to control the plant spacing in about ten centimeters, the row spacing control in about fifteen to twenty centimeters.
4, late maintenance
In the process of late maintenance, you can water the soil with uncontaminated river water to keep the soil moist, you can also provide a mixture of nitrogen, phosphorus and potassium rich fertilizer for the red head onions, to improve the growth rate of the plant, but also for the red head onions to provide a full day of sunshine, so that the plant can photosynthesize, to maintain the green leaves.