When is the best time for grafting Lagerstroemia indica?

Before the branches of Lagerstroemia indica germinate every spring, the stout seedlings are selected as rootstocks, and the top of the rootstocks near the periphery is longitudinally split by a knife (3-4 cm deep), and the split seam must be cut from the core of the tree; Then take a scion with 2-3 buds with a length of 5-8 em and cut it into a wedge shape of 3-4cm on both sides of its base. The outside of the scion is slightly thicker than the inside. Put the thicker side of the scion outside, insert it into the split part of the rootstock to align with the cambium, and then wrap the whole scion with plastic film to expose the bud head. This method can graft branches of different colors on the same rootstock in layers to form a multi-color tree. After 2~3 months of grafting, the film is released, and the length of the ear head can reach 50~80cm. Branches should be cut short in time to avoid being broken by the wind, and thick branches can be cultivated. The survival rate of this cultivation method is over 98%.