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Is Wind Sailing Good For Trees?
Used by permission from Washington State Department of natural Resources, Tree Link News

 

Some tree experts seem to think 'wind sailing' is a great way to save your trees from wind damage. You may have heard about this fabricated notion of thinning limbs from trees in order to make them stable for wind storms. This improper pruning technique is promoted to supposedly make trees safer in the wind by allowing wind to pass through the canopy of a tree, thus reducing movement and strain on a tree. Not so!

 

This may sound reasonable and may even seem to have some logic behind it. But beware; the truth is that there is really no scientific study that definitively shows thinning to increase resistance during a wind storm.

 

Actually, many studies have shown that the outside limbs can divert some wind from the center of the tree and act as a buffering shield. Aggressive thinning, on the other hand, can make the remaining branches more vulnerable to failure, now that they are isolated and must take on the elements alone. As a result, the practice of pruning out a major portion of a tree’s canopy for the sake of staying upright during a wind storm is, in reality, harming most trees in the long run.
Remember, trees need leaves and needles to produce food for their survival. Regardless of what you may have heard, trees do not heal from wounds. Trees only have the ability to compartmentalize and seal themselves off from a wound. So removing live branches actually depletes the energy already stored in the tree by forcing it to compartmentalize the areas around pruning cuts rather than growing new wood in areas that will stabilize and strengthen the tree. Aggressive pruning actually takes away a tree's ability to produce food for itself and, results in unnecessary stress. This stress can be an invitation to disease, bacteria, insect damage, and contribute to general decline due to 'starvation.'

 

"What do I do if I am concerned about my trees falling in a windstorm?"

For the most part, trees have figured out how to react to wind. All trees move, and it is crucial that they bend. Movement is what creates their growth. By moving in the wind, a tree figures out where to add wood to strengthen weak areas (compression and tension wood). When a tree is aggressively wind sailed, it no longer bends or moves and thus no longer builds up holding wood or necessary anchoring roots. Wind sailing can create a false sense of security in the stability of a tree.

 

Most trees that have not been damaged by human interference, root rot, bugs, or disease are more than capable of withstanding our region's fiercest windstorms. It is the trees that do not fit into any of these categories that we should be most concerned about.

 

If your tree is unstable, there may be methods to keep it safe and improve its health. Be sure to contact a certified arborist for any tree advice. And don't even consider topping a tree. It's just a death sentence for that tree. It's much better to remove the tree and replace it with a more suitable tree that is appropriate for its surroundings.

 

Check out how the resources the Washington State Department of Natural Resources offers to tree owners through its Urban and Community Forestry Program.

 

The information and ideas in this article were inspired by Greg Lukens, Certified Arborist, Lukens Tree Preservation, Olympia. Previously posted on DNR's Ear to the Ground Blog

If you have concerns about your trees contact us today to schedule a free 20 minute on-site assessment by a certified arborist, 253-288-8733.

Severe pruning can affect the health of a tree.
Severe pruning can affect
the health of a tree.

 

"Aggressive thinning can make the remaining branches more vulnerable to failure …"

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