What is an important sign of proper healing in trees?

The formation of callus tissue is an important sign of proper healing in trees. Callus tissue develops at the site of a wound as the tree's defense mechanism responds to damage. This tissue is made up of undifferentiated cells that help cover and protect the damaged area, ultimately leading to the healing process. The presence of callus tissue indicates that the tree is actively working to seal off potential entry points for pathogens and is recovering from the injury.

While other factors such as flower bud formation, thick bark development, and quicker growth of branches can indicate tree health and growth, they do not specifically signify the healing process from a wound. For instance, flower buds may indicate that the tree is healthy enough to reproduce, and thick bark can be a characteristic of the species or age of the tree. Similarly, faster branch growth could be related to overall vitality but does not specifically denote healing from injury. Therefore, callus tissue is the most direct and definitive sign of the tree's healing response.