I bought a couple of apple trees at the local big box store. Good price but of course people who work there don't know anything about root stock, etc. I'm guessing they are semi dwart; the tag does say finished height is 10 to 15 ft. This variety is Cortland. How should I prune this?
My thought is to leave a good branch at the bottom, then work my way around about 90 degees and up maybe about 8 inches, then save that branch and so on until running out of branches. In other words, ending up with about 3 or 4 branches spaced 8 to 10 inches apart vertically, and at right angles to each other.
Then, at the top where there is a cluster of 4 or 5 branches coming out of the same spot, choose one good one to leave as a central leader? Is this a good idea? Thx.