hi I would like to ask you since I never tried to do it !! if you can graft on a rootstock of wild pear two scions of pear tree and one of apple tree ??
the grafts are usually practiced to make sure that the future plants have both the peculiar characteristics of the rootstock, and those of the plant on them grafted; typically pear and apple trees are grafted on the quince, as this plant favors the development of good-sized plants, very resistant to the most common fungal diseases; in theory, if two plants belong to the same family, it is possible to insert them one on the other, therefore it is possible to graft an apple tree on a pear tree, or even vice versa a pear tree on an apple tree; however, he considers that some varieties may exhibit incompatibility problems, which can also occur several months after the graft has been successful. If it's a sort of test you want to do, because you want to try to do some grafting for your personal pleasure and satisfaction, you can definitely do it. If instead you want to set up an orchard made up of wild pear trees on which grafts and pear tree branches and apple tree branches, I strongly advise against it. And the motivation is very simple and evident: the pear trees, even of many years, tend to be small saplings, with a disordered foliage; the apple trees instead produce decidedly larger saplings, at least 30% compared to a pear tree, and with a wide round crown. This style of growth and growth remains in grafted plants; and therefore you will find yourself with well developed pear tree branches, and proportionate to the rootstock of the wild pear tree; and instead the branches of apple trees will grow much more, so as to seem hypertrophied and will tend to exploit most of the water and mineral salts absorbed by the roots, to the detriment of the pear tree branches. The result will be a decidedly bizarre plant, unless you keep it pruned, taking into account the different development. It would be advisable for apple scions to be chosen in a variety with small and low growth, so as to make the future plant more balanced. Some time ago I saw a plum tree grafted with branches of red plums with late ripening, branches of yellow plums with early ripening and apricots; the result was a plant that produced fruit from late spring until late summer, with a large crown and sweet-smelling fruits. The apricot chosen on that occasion was of a variety that usually develops small saplings, so as to obtain a well balanced grafted tree. If instead you choose an apple tree that usually gives rise to large plants, and your wild pear tree is of minute development, you will find yourself over the years with a thin and thin trunk, and beautiful thick and vigorous branches.