How NOT to Prune Live Branches
Below are examples of flush cuts, torn bark, and nicked adjacent branches, all of which challenge the tree's "sealing" mechanisms and cause additional stress. Remember - trees don't heal - they seal!
How to Properly Prune Live Branches
Cut in Three Steps
Check your Work
The quality of pruning cuts can be evaluated by examining pruning wounds after one growing season. A concentric ring of woundwood will form from proper pruning cuts (Fig. 6B).
Flush cuts made inside the branch bark ridge or branch collar, result in pronounced development of woundwood on the sides of the pruning wounds with very little woundwood forming on the top or bottom (Fig. 7D). As described above, stub cuts result in the death of the remaining branch and woundwood forms around the base from stem tissues (Fig. 7E).
Cuts that HARM
Amy Grewe, Certified Arborist & Co-Owner