When is the best time to grow leeks?

January onion, February leek. The requirement of leek for fertilizer is mainly nitrogen fertilizer, with appropriate amount of phosphorus and potassium fertilizer. Only when the nitrogen fertilizer is sufficient, the leaves can be fat and tender, and the nitrogen absorption capacity is higher than other vegetables, but too high nitrogen is easy to cause leeks to lodging. Increasing potassium fertilizer can promote cell division and expansion, and accelerate the synthesis and operation of sugar; Adequate application of phosphate fertilizer can promote the absorption of nitrogen fertilizer by plants and improve the quality of products.

Base fertilizer for seedbed and nursery: Before winter or before cultivated land, sprinkle bird's nest water-soluble fertilizer on each mu of land, turn it into the soil, and level it for border. After the border tillage, a certain amount of decomposed high-quality farmyard manure can also be spread on the border surface.

Topdressing at seedling stage: In order to promote the growth of Chinese chives at seedling stage, the second topdressing is usually combined with watering when the height of Chinese chives is about 12 ~ 15 cm.

Planting base fertilizer: when the height of leek seedlings reaches 18 ~ 20cm, it is suitable for planting leek. Before planting, a large amount of decomposed organic fertilizer should be applied in the planting area to create a better living environment for the growth of leeks. Apply bird's nest water-soluble fertilizer to an acre of land, pave it, plow it into the soil, level the ground, make a border or open a planting ditch according to the cultivation method, apply high-quality farmyard manure to the border and ditch, and plant it after mixing the fertilizer and soil evenly.

Topdressing during the vigorous vegetative growth period: After planting in hot summer, leeks will enter the cool autumn. This is the most suitable growth stage of leek and the key period of fertilizer and water management. Timely fertilization promotes leaf growth, which lays a material foundation for rhizome expansion and root growth of leek. The overwintering ability of leek and its growth in the coming year mainly depend on the amount of nutrients accumulated by plants before winter, and the accumulation of nutrients depends on the growth in autumn, so it is necessary to do a good job in fertilizer and water management at this stage. Generally, you have to chase fat 2 ~ 3 times.