Different fertilizers should be selected according to the types of vegetables, nitrogen fertilizer should be applied to leaves, and potassium fertilizer should be supplemented to fruits and vegetables.
Usually, sufficient fertilizer should be applied first when planting, and the fertilizer is mostly slow-release fertilizer. In its growing period, it needs proper topdressing, usually urea or water-soluble fertilizer, which is easier to absorb. In addition, the amount of fertilizer must be controlled to avoid fertilizer damage.