Grafting schedule of apple trees in northern China

Grafting time of northern apple trees: 1, spring grafting, half a month before germination-one week after germination (mid-to-late March), mainly using belly grafting with top single bud or splitting grafting, cutting grafting, skin grafting, budding with xylem, etc. 2. Summer bud grafting, which is carried out in mid-July, mainly adopts bud grafting with xylem or T-shaped bud grafting (which germinates that year and grows into semi-finished products); 3. Autumn bud grafting is carried out in mid-September, mainly with xylem bud grafting or T-bud grafting (no germination in that year).