2. Huangpi fruit trees are suitable for grafting and breeding new varieties from March to September. It is suggested to graft in March in spring, because wampee trees like warm and humid growth environment, which is very suitable for planting in southern China. In the southern region, the temperature has started to warm up in March, and the plants have begun to sprout, but the scion has not yet sprouted, so grafting is easier for the wound to heal and the grafting survival rate is higher.