About 8 or so years ago We planted 3 semi dwarf apple trees. We planted 2 honey crisp trees and one sweet sixteen tree. I think that was for pollination. Last season one of the honey crisp trees produced apples. Unfortunately the sweet sixteen tree didn't make it through the winter. It did not leaf out at all. Do you have any idea what might have happened to it? Also I would guess we need to replace that tree. Can you recommend a tree that will pair well with the honey crisp trees in Minnesota? I don't think I want to use a sweet sixteen again.