Why Do Some Trees Have a Burl?

Leaves produce nutrients needed by the tree for its growth, blossoms and fruit. The mutrients are then carried through vessels in the bark to every part of the tree. If the bark is cut, the vessels at the cut are broken. As a result the nutrients pile up at the site

of the damage and eventually it becomes a burl Damaged bark will certainly affect the conveying of nutrients serious damage might cause the a tree. Therefore, we should protect trees being damaged.