Which part of the tree should be avoided when making cuts to promote healing?

The branch collar is the area of tissue that surrounds the base of a branch where it intersects with the trunk or another branch. This region contains specialized cells that play a crucial role in the tree’s healing process. When cuts are made too close to the trunk or within the branch collar, it can hinder the tree's natural ability to seal the wound effectively, increasing the risk of disease and further damage.

By avoiding cuts within the branch collar and making precise cuts just outside of it, the tree can initiate its healing response more efficiently. This allows the tree to form callus tissue over the cut surface and helps in compartmentalizing any potential decay. Thus, understanding the anatomical structure of the tree and selecting the appropriate cutting techniques is essential for promoting healthy tree pruning and maintenance.