On a couple young trees in my yard, I noticed damage to their trunks, which are about 1 to 1-1/2 inches in diameter. In just a couple places on the trunks, it looks as if a knife started to slice into the bark and peel it back, like you would peel an apple. It’s not a string trimmer since these trees are in the middle of a perennial bed. My guess is that it is an animal that is sharpening its teeth. If it enjoyed the taste, wouldn’t it keep chewing? One tree is a Japanese maple (1 year old) and the other is a witch hazel (3 years old). How can I protect the young tree bark without harming the trees? Tree wrap seems futile since the animal would chew right through it?
Damage to trees often can heal over. Vertical tears are more likely to heal over than horizontal ones, such as string trimmer damage at the base of the tree. With a sharp knife, remove loose bark and create a smooth edge. Rough edges do not heal as quickly. Asphalt-based pruning tars should not be used as they make it more difficult for the tree to heal. Leaving the wound open is actually best. If you feel compelled to cover the wound, use a natural orange shellac. Plastic tree wraps can be used to protect trunks from animal damage. Deer and rabbit repellent, pepper sprays, and an array of other chemicals can be used as to discourage animal damage and feeding as well. As a last resort, fencing may be needed to discourage some animals.