Technical points of split grafting of watermelon

The rootstock adopting the splitting method should be sown 7 to 10 days earlier than the scion, and the appropriate period is 1 true leaf of the rootstock and the cotyledons of the scion are unfolded. When grafting, the rootstock growth point is removed first, and a blade is used to cut a 1 - 1.5 cm incision downward from the middle side of the cotyledon, and then the scion is cut on both sides of the cotyledon hypocotyl, the section length is 1 - 1.5 cm, and the cut scion is inserted into the rootstock split, and then tied or clamped with a grafting clamp.