Before planting citron, apply a proper amount of base fertilizer, mainly soil mixed fertilizer, to the hole. In winter and spring, when it is cloudy, it is required to plant a little soil. Plant the roots well, tie them tightly layer by layer and cover them with fine soil. The requirements for water and fertilizer are not strict, but avoid waterlogging. It is required to loosen the soil and weed twice a year and apply fertilizer 1 time. Farmhouse manure is the main fertilizer, nitrogen fertilizer is the main fertilizer, and some phosphorus and potassium fertilizers are mixed appropriately. After the sixth year of planting, not only the reclamation, weeding and fertilization should be carried out 1 time every year, but also the branches should be trimmed and reshaped in time, and the branches, drooping branches and pests and diseases should be trimmed to maintain a good crown shape.