The best cut is at (B) just above the branch collar (C). The stub (A) dies and can introduce disease into the tree; the tree cannot close the wound until the stub is removed. The branch collar houses repair cells which means we also do not want to cut into the collar.
Practice making Proper cuts and your trees will be that much healthier for it.
[…] certification is optional but good cuts are not. Never leave stubs. The tree can’t cover up the wound, the stub dies and could serve as an entry point for […]