We have an old apple tree that grows right next to our gas barrel here on the farm. Admittedly this is not an ideal location, but these are the very best apples for making apple pie. My grandmother planted a crabapple tree (the only native apple tree to North America) there many years ago. In the wild, apples are highly heterozygous and don’t grow true to the subspecies of seed. Apples of all varieties are created by grafting trees onto a hardier apple root stock. This is how our favorite apple originated: from the root stock of the original crabapple, a separate seedling grew into another tree. We are not sure what kind it is but believe it to be a Mackintosh.