What should I pay attention to when grafting old Lagerstroemia indica piles with multicolor Lagerstroemia indica?

First of all, the best grafting time is in spring. The climatic conditions in spring in Jiangsu and Zhejiang are very suitable for the growth of Lagerstroemia indica. Grafting is carried out within ten days to half a month before Lagerstroemia indica germinates. Under the premise of skilled technology, the grafting survival rate can be guaranteed to be above 95%. This is the most vigorous stage of Lagerstroemia indica sap flow. After grafting, the interface heals quickly and the healing quality is high. After that, it can catch up with the germination period of Lagerstroemia indica, which has strong vitality and is conducive to the survival of scions.

After grafting, the grafting site and interface should be tightly wrapped with plastic bags to reduce water evaporation and promote interface adhesion. When the scion survives (new buds are formed on the scion), the plastic bag can be gently removed if weather conditions permit.

The maintenance of polychromatic Lagerstroemia indica after grafting old piles is basically the same as that of common Lagerstroemia indica, and normal watering and fertilization can ensure its good growth. However, it should be noted that after the scion grows new branches and germinates, the buds on the rootstock should be smoothed slowly. At the beginning, about two-thirds of the buds were erased. With the increasing number of new shoots, the proportion of budding on rootstocks should also be continuously improved until the crown change is finally completed.