Project Objective: Treating Impact Wounds and Preventing Decay in a Cedar Tree
Location: Victoria, BC
Date: Sept 2024

Tree Service Job Overview

Overview

A construction project in Victoria led to an unfortunate incident where a digger accidentally struck a mature cedar tree on a client’s property. The impact caused a significant wound on the tree's trunk, exposing the inner wood and making it vulnerable to disease, decay, and insect infestation. This incident highlights the broader concept of "tree trauma," which refers to the physiological stress and long-term damage trees endure following physical injuries.

Challenges

The injury to the cedar tree was severe, with torn bark and exposed cambium tissue. This type of impact wound is classified as tree trauma, which can lead to a cascade of negative effects, including increased vulnerability to pathogens, disruption of nutrient flow, and a weakened defense system. The tree was at high risk of developing decay and infections, which could compromise its structural integrity over time. As well, the wound’s location near the base of the trunk increased the potential for long-term damage. The client wanted to preserve the tree if possible, as it was an important part of their home.

Solution

Advantage Tree Care's arborists came to assess the damage and implement a treatment plan. First, we carefully cleaned the wound, removing any loose or damaged bark to prevent further tearing. This was followed by a precise pruning of the wound edges to encourage proper healing and limit the spread of decay.

To protect the tree from infection, we applied a biofungicide to the wound site, helping to reduce the risk of fungal colonization. Additionally, we installed a temporary tree wrap to shield the wound from environmental stressors while it began to heal. Recognizing the tree’s increased vulnerability, we recommended a supplemental deep root fertilization to support the tree’s overall health and resilience.

In addressing tree trauma, it’s critical to understand that trees cannot “heal” in the same way animals do. Instead, they compartmentalize damage—a process known as CODIT (Compartmentalization Of Decay In Trees). By forming barriers around the injured area, the tree isolates the wound to prevent the spread of decay and pathogens. However, this process can be hindered by factors such as the size and location of the wound, environmental stress, and the tree’s overall health.

Given the severity of the trauma, we advised the client on long-term monitoring, including regular health assessments to check for signs of decay or pest activity. If any issues were detected, we planned for targeted interventions to mitigate further damage.

Outcome

The cedar tree responded well to the treatment, with no signs of infection or decay developing around the wound. The client was relieved that the tree could be saved, especially given its prominence in their yard. Our proactive approach not only addressed the immediate injury but also set the foundation for the tree’s ongoing health and recovery. The client appreciated our detailed care plan and our ability to manage the situation swiftly and effectively.

Understanding Tree Trauma

Tree trauma, such as the impact wound in this case, triggers a complex biological response. Trees store energy in their roots and trunks, which they rely on to repair damaged tissues. However, when a tree experiences a significant injury, it diverts energy and resources from growth and defense to damage control, potentially weakening its ability to fend off other stresses like drought, pests, or additional wounds.

Moreover, traumatic injuries expose the tree’s inner tissues, including the cambium and xylem, to air and pathogens. This exposure can lead to infections that, if unchecked, may spread and compromise the tree’s structure. Understanding the process of compartmentalization helps arborists make informed decisions about treating wounds and preventing long-term damage.

Have a look through some of the photos from the job.