Commonly used rootstocks for grafting abroad are lime, rough lemon, orange and so on. Recently, grapefruit has proved to perform well. In China, Fructus Aurantii is often used as rootstock, and oranges, oranges, lemons (local lemons) and red oranges can also be used. Selecting excellent single scion; Grafting method: single bud cutting in spring; Bud grafting is adopted in autumn.

In principle, we should choose a relatively strong rootstock, and we will know if it is suitable or not.

Lemons are more suitable for planting in the south. Lemon is warm, resistant to shade, not cold, and also afraid of heat. Therefore, it is suitable for cultivation in subtropical areas with warm winter and cool summer. In areas with warm winter and small annual temperature difference, it is suitable for the annual average temperature 17 ~ 19℃, greater than or equal to 10℃, and the annual effective accumulated temperature is 5200 ~ 6500. In the area where the annual average temperature is lower than 17℃, the area where the short-term low temperature is -5℃ and the periodic freezing injury, it is not suitable for economic planting in the open field. The requirements for soil and topography are not strict. Flat land and hilly slope are suitable for planting, but the slightly acidic soil with deep and loose soil layer, rich organic matter, strong water and fertility conservation, good drainage, low groundwater level and pH value of 5.5 ~ 6.5 is the best.