Creating Company Culture – TCIA Podcast Featuring Jeff & Amy Grewe
Did you miss our previous article…
https://www.treesforeducation.com/?p=160
Arbor Anesthetics – Innovative Pain Management Solutions for Tree Pruning
Here are FIVE ways you can prevent harm to your trees:
- Flush Cuts – Improper Pruning Techniques
- Mulch – but not too much!
- Will cutting into a tree’s roots harm the tree?
- DIY Tree Pruning
- Tree Topping Hurts
Don’t fool around with your trees! Hire a professional, Certified Arborist, like Arbor Aesthetics Tree Service!
Flush Cuts – Improper Tree Trimming Techniques
Trees have a response to wounding, coined “Compartmentalization of Decay in Trees” or “CODIT.” A tree “walls” off decay in four layers of bark tissue, preventing decay from moving vertically, radially and tangentially. When a wound occurs naturally, the tree gets to work using its own defense mechanism to keep decay-causing fungi from spreading. When a wound occurs during routine tree pruning (yes – it’s a still a wound!), a trained arborist can take steps to ensure the tree is given its best shot at using its CODIT system.
Maintaining the branch collar is critical in tree pruning and allows the tree to form a proper callus around the wound. The illustration to the right shows a clear swelling of tissue at the branch collar as the tree is preparing to shed a dead limb naturally. Trees know what they’re doing! When we prune live limbs, we can use this as a model for where to make our cut – by not cutting into the branch collar. The branch bark ridge is not always obvious, and when it is not easy to identify the collar, we consider it best practice to come away from the trunk slightly. It would be better to leave more of a stub than it would be to cut into the branch collar.
In general (and certainly not in all cases), a proper pruning cut will result in a circular wound or as close to a circle as possible. In the photos, you can see the elliptical shape of the cut where the flush cut was made parallel to the trunk, but not perpendicular to the branch, resulting in a vertical ellipse where we can see the branch collar was removed.
If you are unsure where you make a proper pruning cut, it’s best to consult a certified arborist. You can read more about DIY Pruning in a previous blog post.
- Compartmentalization of Decay in Trees, Bartlett Tree Experts
https://www.bartlett.com/resources/compartmentalization-of-decay-in-trees.pdf - University of Iowa Extension & Outreach
https://hortnews.extension.iastate.edu/faq/when-pruning-trees-it-desirable-make-flush-cuts#:~:text=Flush%20cuts%20are%20pruning%20cuts,collar%20and%20branch%20bark%20ridge.