Owner's commentsPlanted at 6000Ft in zone 5 hardiness zone. Was a container tree purchased from Wilmore garden center in Centennial in 1981. Probably the M111 rootstock, but not certain. Started about 5ft tall, now easily 30ft. Has survived -25F winters, and +100F summers, periods of both heavy rain and very dry. At this location this tree tends to bloom early, and frequently gets caught by the late Spring snow storms. As a result it is not a particularly consistent producer. Also, I let it go to shade tree years ago. I have gotten heavy apple crops off of it, so it could be a great cider apple producer if pruned properly. It also requires a different species to pollinate, and that seems to be hit or miss in this neighborhood. All in all, a great hardy tree that tolerates neglect.