To grow an apple tree, does the rootstock donor requirement to be from an apple tree also? I'm guessing it does, but hoping it doesn't.

I'm guessing it does, but hoping it doesn't.
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Answers:    If not an apple, it should be closely enough related (i'm guessing pear or quince may work - but may eventually fail) Are you graft your own tree?

No, oak won't work.
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Pls double check my answer but I thought the rootstock is merely used to control how big the tree is growing into when matured. As long as the branches that you use are apples you grafted onto the root stock, after they will become apples. I have freshly bought a apple tree with two types of apples graft so I don¡¯t need to plant 2 different trees.
Does any one no how to grasp skins...