Tree Red Flags: What Homeowners Should Watch For! 

When two main trunks (leaders) grow upward together instead of one central leader, they often form a weak union. These trees are more likely to split apart during storms, especially as they get larger.

If soil at the base of the tree looks lifted or mounded, it can be a sign that the tree is shifting in the ground. This usually means the root system is failing, and the tree could fall.

Strong tree branches form a “U” shape at their unions. A tight “V” shape usually creates included bark—a weak point where the branch is more likely to crack or split. These are a sign of having codominant leaders.

Holes or hollow spots in the trunk often indicate internal decay. Even if the outside of the tree looks solid, cavities can weaken its structure and stability.

Areas where the bark looks darker, wet, or almost black may be signs of bacterial infection, fungal issues, or stress. This is often called “bleeding” and should be evaluated.

Bulges or swelling along the trunk can mean internal decay, stress cracks, or past injury. It’s a sign the tree is trying to “compartmentalize” a problem but may still be weakened.

Think mushrooms, conks, or brackets on the trunk/base. These often signal internal decay or compromised roots.

Also, called Summer Limb Drop. Large, seemingly healthy branches dropping in calm conditions is a sign of internal stress and structural weakness.

Long vertical cracks or splits weaken the tree and increase the risk of failure.