This August I was lucky enough to move into a house that has well-established Granny Smith, Melrose, Gravenstein, and Yellow Transparent
apple trees (30+ years old, I'm guessing). There was also a much younger Honeycrisp, I'm guessing no more than five years old, but I'm not exactly sure. It was wrapped up in some fencing to protect it from
deer, but had outgrown its confines and was pretty covered in weeds. A few weeks ago I unwrapped it, pulled all the weeds out, and added a couple of inches of
compost.
Unfortunately, said baby Honeycrisp clearly needs a prune, and probably an aggressive one. There are three stems coming out essentially at ground level. One is clearly growing from the root stock, and actually comes out almost below ground level (on the left in the picture below). I'm guessing this branch must go. Of the other two, I can't tell which one is the graft and which is the root stock. From what I understand if encouraging strong, vigorous
fruit tree growth, only one of these stems can remain. But which one?
The Honeycrisp had fruit on it this year, and it was tasty; so its not a major loss if I end up pruning away the graft. But I'd like to make a stab at preserving the graft, since I do like Honeycrisp apples.
So, which branches do I prune? And when (I was planning on February)? And what else
should I do to promote the health of this somewhat-neglected baby tree?