Continued from When To Prune
Know Where to Cut: A very common pruning mistake when removing branches is to cut them off too close to the main trunk. By doing this, you remove the branch collar, an area of tissue cells that help the pruning wound to heal. The branch collar looks like a small swelling or bump and is located where the branch meets the trunk. This natural protection boundary prevents disease from entering the trunk. Without it, you open a wound that allows entry for disease and pests. The rules are don’t cut branches flush to the trunk, don’t leave stubs, and cut at an about a forty-five degree angle away from the tree or shrub as shown in the drawing and photo below.