1, timely fertilization: timely fertilization means fertilizing vegetables when they need fertilizer. When it is found that the color becomes lighter and the growth becomes weaker, it is necessary to supplement the fertilizer in time.

2. Appropriate fertilization: Fertilization must be differentiated according to the different growth periods of vegetables. For example, more nitrogen fertilizer, more water and more times should be applied at seedling stage to promote the growth and health of seedlings. After the seedlings grow out, more phosphorus and potassium fertilizers should be applied, and more nitrogen fertilizers should be applied to leafy vegetables to make the leaves green. More nitrogen fertilizer should be applied to fruits and vegetables to make the leaves green, and more phosphorus and potassium fertilizer can make the plants blossom and bear fruit early and make the flowers and fruits bright.

3. Loosening soil before fertilization: Before fertilization, the surface of potted soil should be raked loose. When the potted soil is slightly dry for fertilization, water should be sprayed on the leaves immediately after fertilization to avoid residual fertilizer from hurting the leaves. Water must be watered once the day after fertilization.