Tree surveys are essential for understanding the health, structure, and safety of the trees on your property. When reviewing a survey report, certain “red flags” indicate trees that may pose a risk, require immediate attention, or need careful management. Knowing what to look for can help homeowners and property managers make informed decisions and prioritize tree care effectively.
Fungal growths, such as mushrooms or conks at the base or on the trunk, often indicate internal decay. While some fungi are harmless, many signify rotting wood that weakens the tree’s structure. Arborists flag these trees because they may be prone to branch or trunk failure, especially in storms or high winds. If you notice mushrooms or brackets, avoid leaning or standing near the tree until an arborist assesses it.
A tree with a noticeable lean may indicate root instability, soil erosion, or internal decay. Minor leans aren’t always dangerous, but significant or sudden leaning can signal that the tree could topple. Survey reports often recommend monitoring, cabling for support, or in severe cases, removal.
Dead or broken branches are classic red flags. They can fall unexpectedly, causing injury or property damage. Surveyors often categorize trees with extensive deadwood as higher risk and may suggest crown reduction, removal of dead branches, or full removal if structural integrity is compromised. Winter or early spring is often the best time for pruning without stressing the tree further.
Cracks along the trunk, deep wounds, or cavities signal structural weaknesses. They reduce the tree’s ability to bear weight and can worsen over time. These red flags are particularly concerning for trees near homes, power lines, or footpaths. Arborists may recommend monitoring, bracing, or targeted pruning to prevent sudden failure.
Roots may be exposed, damaged, or decayed. Surveyors flag these conditions because the root system anchors the tree; compromised roots increase the risk of toppling. Signs you can check yourself include uplifted soil, leaning trees, or mushrooms near roots. Protecting or stabilizing roots early can extend the tree’s lifespan and maintain safety.
Certain insects, like borers or bark beetles, weaken the tree internally. Surveyors note infestations as red flags because they can accelerate decline and structural failure. Look for signs such as holes in the bark, sawdust, or dying branches. Early intervention can prevent spread to other trees.
Contact a professional immediately if you notice:
These situations present immediate risk and should not be delayed.
Not always. Some trees can be stabilized with pruning, cabling, or bracing. Structural pruning, for example, removes high-risk limbs while maintaining the tree’s overall health. However, trees with severe internal decay, extensive root loss, or multiple risk factors may need removal to ensure safety.
Arborists often recommend more frequent monitoring for trees with red flags:
Regular monitoring helps catch changes early and prevents emergencies.
Not necessarily. Red flags indicate potential risks, not automatic removal. The survey report typically prioritizes actions: urgent removal, mitigation (pruning or bracing), or continued monitoring. A professional assessment ensures interventions are appropriate, safe, and cost-effective.
This preparation allows the arborist to conduct a thorough assessment and provide clear recommendations.
