1. Replenishing: If the buds are fresh and the petioles fall off at the first touch after 15 days of bud grafting, they have survived. Unviable stock seedlings should be replanted in time. If the stock is too late, it will not be able to peel off, which will affect survival.
2. Cut the stock: If the grafted buds have survived, in addition to the cut grafts, the ventral grafts need to be pruned. Before germination, cut off the stock above the grafted buds to concentrate nutrients for the growth of the grafted buds. However, it is not advisable to cut the anvil too early to prevent the cut edge from drying out and freezing. Rootstocks that have not survived the winter can be re-grafted by branch grafting in spring.
3. Removal of sprouts: Grafted grapefruit seedlings tend to sprout a large number of sprouts from the base of the rootstock after cutting the stock. They must be removed in time to prevent the cut from drying out and freezing.
4. Set the stem: Cut the top of pomelo seedlings before and after the beginning of autumn, leaving a stem height of 30 to 40 cm. Generally, it is most suitable to cut the top of the pomelo seedlings at the top 2 to 3 internodes of the first summer shoot. The cultivated seedlings are about 50 cm high, with 2 to 3 strong and evenly distributed branches.
5. Fertilization: The principle of fertilizing grapefruit tree grafted seedlings is to apply thin fertilizer frequently, and water once every 3 to 4 days in case of drought. It is rainy in summer, and drainage work must be done well.
6. Disease prevention: Grafted grapefruit seedlings should be timely prevented and treated against anthracnose, canker, leaf miner, red spider mite, yellow spider, aphid, swallowtail butterfly larvae and other damage.