The best time to plant a tree was 20 years ago. The next best time is now. - Chinese Proverb
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Topping Tree is Bad

Topping Trees is Bad

The tree in your back yard is starting to become tall.  It’s overhanging your house and every time there is a storm you begin to worry.  You may think that the solution to drastically cut the tree to a shorter height, however, by doing so you may actually be creating a far bigger hazard.

 

“Topping” refers to the aggressive and indiscriminate removal of live crown which is typically associated with height reduction. The resulting improper cuts are referred to as ‘stubs’ and are often cut back to bare wood or areas with no viable supporting lateral branches. Topping is an unacceptable arboricultural practise that destroys the crown form and severely jeopardizes tree health and structure.

What happens when a tree is topped?

•Deplete food making ability 

•Promotes rapid spread of decay

•Vulnerable to insect attack and spread of disease 

•Weakens structure and creates a hazard

•Produces weakly attached  water shoots

•Expensive and costly maintenance

•Devalues property and looks ugly

 

            

 

Every leaf on a tree is a food factory that captures light energy from the sun to produce sugars and starches.  When a tree is topped the live crown is removed which essentially removes the majority of the leaves.  The lack of foliage can starve the tree creating a domino effect of tree decline and tree stress.

 

When a tree cannot produce enough food it cannot defend itself from fungal and insects attacks.  Cut wounds resulting in stubs create decay pockets which can quickly spread into columns of decay.  Decay in trees will weaken the structural integrity of the tree whether is at a branch or along the trunk.  Without a means to defend itself the tree will also attract insects such as wood borers which can further compromise the structure.  

 

The removal of the shaded canopy will suddenly expose bare trunks and branches to more intense light and heat.  Just how people can have a sun burn, trees can have a similar condition referred as sunscald.  The burn on branches can destroy tissues under the bark causing canker lesions, bark splits/cracks, and even limb death.

 

Depending on the tree species, when the tree is starved of food or is stressed, it can trigger a growth response to produce water shoots (a.k.a. suckers).  The purpose of these shoots is too over compensate for the lack of food which produces an over-abundance of these shoots all growing at the site of the stub cut.  Water shoots are emergency regrowth that are weakly attached to the tree and can grow considerably faster than a normal healthy branch.  If the initial objective for home owner was to shorten the height, the effect of topping can in fact over stimulate the production of water shoots resulting a much taller tree over a shorter time span  versus leaving the original tree untopped.  Topping is not only a waste of money but it is also expensive to do and expensive to maintain as upkeep is more frequent with a faster growing tree.