I have been using roottrapper bags, (8 inch diameter and 11 inches high), for about 10 years. They are great for growing trees and then planting them out in the field. They retain moisture well and create a dense rootball. Removing the trees from the bags has not been that easy. I want to re-use the bags as they are not cheap. My method is to turn the bag inside out to remove the tree. First I use a knife to cut around the circumference inside the bag. This releases the roots that tend to adhere to the sides, then I roll the bag inside out starting at the top. This process tends to be accompanied with grunts and groans as the bag slowly peels away from the rootball. I use a post to stabilize the bottom of the bag and then a pair of clippers to release the roots from the bottom of the bag. Some trees are just too old and I should remove them sooner, but I have the same issue with trees planted in the bags 6 months ago. Any one else using this method? Any suggestions to make this easier?