May I add something about digging those tree holes?
Dig an off shaped hole. Not round or oval, just jagged weird shape. Sometimes rounded holes encourage girdling roots as if the tree were to become rootbound in a pot. Pointy edges encourage the roots to grow outward and continue into that surrounding soil. This in addition to the things listed by TIK.
Soils in my area are notoriously bad so I have to make every effort to get that root system out there.
Awesome. I’ve planted 4 fruit trees and 1.5 of them have survived, so I’m taking all the information I can get. (There is Lazarus the apple tree in the front yard, but I can’t take credit for him; he was there when we bought the house.)