How Do You Know When a Tree Must Come Down?
Trees are valuable — they provide shade, privacy, and beauty to your Rochester property. But trees that have become diseased, structurally compromised, or hazardous are serious liabilities. Knowing the warning signs that a tree needs removal can save your home, your car, and potentially someone's life. Here are the 8 signs our certified arborists see most often in Monroe County.
1. Dead or Missing Bark (Cankers)
Large sections of missing or deeply cracked bark — called cankers — indicate the tree is dying in that section. If the dead section encircles the trunk, it will kill everything above it. These trees become extremely brittle and can snap suddenly under Rochester's heavy snow loads.
2. Mushrooms Growing at the Base
Fungal growth at the base or roots is a serious red flag. It indicates root rot — the tree's foundation is decaying. A tree with rotted roots can topple without any warning, even on a calm day. This is one of the most dangerous tree conditions we see in Rochester.
3. Significant Lean
While some trees naturally grow at slight angles, a sudden or increasing lean — especially toward your house — is a major warning sign. Heavy snow from a Rochester winter, combined with saturated soil in spring, dramatically increases the risk of a leaning tree falling.
4. Dead Branches Throughout the Crown
A few dead branches are normal. But when 30–50% or more of the crown is dead, the tree is in serious decline. Dead branches — called "widow makers" — can fall without warning under the weight of Rochester's ice and snow.
5. Hollow Trunk
A tree can survive with some internal hollowing — it may still draw water and nutrients from the outer layers. However, once the hollow exceeds about one-third of the trunk's diameter, the tree no longer has the structural strength to withstand Monroe County's winter storms.
6. Cracks or Splits in the Trunk
Deep vertical cracks in the trunk, or splits at major branch unions, indicate the tree is under extreme structural stress. These cracks can propagate rapidly during ice storms — one of the most common causes of catastrophic tree failure we see after Rochester winters.
7. Roots Lifting Out of the Ground
When a tree's roots begin lifting from the soil on one side, the tree's anchor is failing. Compacted soil, construction damage, and root rot all contribute to this. These trees can topple with very little wind force.
8. The Tree is Dead
A fully dead tree should be removed promptly. Dead trees dry out and become extremely brittle — often more dangerous than living trees because the wood breaks unpredictably. They also attract wood-boring insects that can migrate into nearby healthy trees.
When to Call an Arborist vs. Call for Removal
Not every problem tree needs to be removed immediately. Cabling, bracing, and targeted pruning can sometimes extend a tree's life safely. However, if a tree shows multiple signs from this list — especially root damage, severe lean, or advanced decay — removal is almost always the safer and more cost-effective choice long-term.
When you call A One Tree Services, our certified arborists give you an honest assessment. We will tell you clearly if a tree can be saved, needs immediate removal, or can be monitored. We never push unnecessary removals.
Frequently Asked Questions
It depends on the cause and degree of the lean. Recent leans caused by wind or soil saturation may be cableable if the roots are intact. Older established leans typically indicate a more serious structural issue requiring removal.
As soon as reasonably possible — especially before Rochester's winter storm season. Dead trees dry out and become brittle within one season, dramatically increasing the risk of sudden failure.
If you knew the tree was dead and neglected to remove it, your insurer may partially or fully deny the claim. Proactive removal is always cheaper than dealing with storm damage repairs.
