How to water trees in high temperature in summer is the most suitable?

Generally, don't water the trees at noon in high temperature in summer, and it is most suitable to water them in the morning or at night. The pruning of seedlings is determined by a fixed stem height. Generally, the fixed stem of garden trees is 1.5-2m, and all the side branches below the fixed stem height are cut off. Under the condition of the same stem height, the top can be cut off to promote the lateral branches, which is beneficial to the early formation of the crown. The sprouting branches at the root of Lagerstroemia indica should be cut off. If it is to be cultivated into a bush ball, it is not necessary to cut it off, but the flower branches after flowering should be cut off.