What Are Growths On The Side Of Trees?

19 December 2017, 16:28

Trees
Picture: N/A

Mystery Hour Question

When I’m walking my dog in Richmond Park, I often notice huge growths on the side of trees. How are they formed?

Duncan, Richmond

Answer ** Definitive **

Name: Andrew, Newcastle

Qualification: Woodturner and woodworker

Answer: They are caused by a deformation in the grain when the tree is growing. It can be as a result of trauma or fungus growth.

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