That is the plan but apparently sometimes it heals itself over with bark again. We will see how this goes. If it works I will prune below and then have a $50 apple tree for free. Well, for the price of the pots, which were I think $20 for 5. You can do it with plastic bags or anything that can seal the moisture in but these seemed easier and more durable. I have seen people use margarine or yogourt tubs as well.