What solar term is grafting fruit trees?

Generally, there are two grafting periods: spring, summer and autumn. 1, spring grafting should be carried out in early spring before fruit tree germination, because rootstocks and scions are rich in tissue at this time, and temperature and humidity are also conducive to the vigorous division of cambium and accelerate wound healing; 2. The suitable time for budding in summer and autumn is from June to August. At this stage, the rootstock is easy to peel off and the wound is easy to heal after grafting. But the best time is August, because the scion is fully developed at this time, and the bud does not germinate in the second year after bud grafting, and it grows vigorously.