Signs a Tree Might Be Dangerous (And What to Do Next)

13 April 2026

Trees are a valuable part of any outdoor space. They add character, provide shade and support local wildlife. But like any living structure, trees can develop problems over time. When they do, they can become a risk to people, property and surrounding areas.

At DTG Trees & Grounds, we regularly assess trees across Devon and are often called out when something “doesn’t look quite right.” Knowing what to look for can help you act early and avoid bigger issues later.

Common Signs a Tree May Be Unsafe

Not all tree defects are obvious, but there are some key warning signs that shouldn’t be ignored.

1. Cracks in the Trunk or Major Branches

Visible splits in the trunk or large limbs can indicate structural weakness. These cracks may worsen over time, especially in high winds or heavy rain, increasing the risk of failure.

2. Dead or Dying Branches

Large dead branches in the crown can fall without warning. This is particularly dangerous in gardens, near footpaths or close to buildings.

3. Leaning Trees

A slight lean isn’t always a problem, but if a tree has recently started leaning or the angle has increased, it could suggest root instability or soil movement.

4. Fungal Growth Around the Base

Mushrooms or fungal brackets at the base of a tree can be a sign of internal decay. While not all fungi are harmful, some indicate significant structural weakness within the trunk or roots.

5. Cavities and Decay

Holes or hollow areas in the trunk or major limbs can reduce the tree’s strength. What you see externally is often only a small part of the issue.

6. Root Damage or Ground Disturbance

Exposed, damaged or lifted roots can affect the tree’s stability. This is often seen after storms or groundworks nearby.

Why Early Action Matters

Trees rarely fail without warning. In most cases, there are signs beforehand, but they can be easy to overlook or misinterpret.

Acting early allows for:

Safer, more controlled work
Lower costs compared to emergency call-outs
The possibility of retaining the tree rather than removing it
Reduced risk to people, buildings and vehicles

Leaving a potentially dangerous tree unchecked can lead to sudden failure, especially during storms or high winds.

What Should You Do If You’re Concerned?

If you’ve spotted any of these signs, the best step is to get the tree assessed by a qualified professional.

A proper inspection will look at:

The tree’s overall condition
Structural integrity
The likelihood of failure
The level of risk to surrounding areas

In some cases, the solution may be simple pruning or management. In others, more significant work may be required. The key is getting clear, informed advice.

Professional Tree Inspections You Can Rely On

At DTG Trees & Grounds, we provide detailed tree inspections and surveys across Devon. Where needed, we can carry out more in-depth assessments, including aerial inspections and risk evaluations, to fully understand the condition of a tree.

Our goal is always to give honest, practical recommendations. That might mean reducing a risk, managing the tree long-term or, where necessary, removing it safely.