5 Signs Its Time to Remove a Dead Tree

A dead tree in your yard is not just an eyesore. It is a ticking clock. Every freeze-thaw cycle, every summer thunderstorm, and every heavy snowfall weakens the wood further, increasing the chance that a large limb or the entire trunk will come down on your roof, your fence, your car, or someone walking underneath. In the Chicago area, where winter ice loads and spring wind events are part of life, a compromised tree can go from standing to on the ground in seconds.

The challenge is that trees do not die all at once. Decline can take months or years, and some species hold onto their form long after the living tissue is gone. Knowing what to look for is the difference between a planned, safe removal and an emergency call at two in the morning. Here are five signs our arborists use every day to determine when a tree has crossed the line from struggling to dangerous.

1. Bare Branches During the Growing Season

This is the most obvious indicator, but it is also the one homeowners second-guess the most. If your tree has failed to leaf out by mid-June, or if entire sections of the canopy remain bare while the rest of the neighborhood is fully green, the branches in question are almost certainly dead. In a healthy deciduous tree, buds swell in April and leaves are fully expanded by late May in USDA Zone 5b, which covers Stickney and the surrounding suburbs.

There is a simple scratch test you can perform yourself. Use your thumbnail or a small knife to scratch a twig on the suspect branch. Living wood beneath the bark will be green and slightly moist. Dead wood will be dry, brown, and brittle. If every branch you test comes back brown, the tree has likely been dead through the entire previous winter and the root system has stopped functioning.

Ash trees deserve special attention here. The emerald ash borer, an invasive beetle that arrived in the Chicago region around 2006, has killed tens of millions of ash trees across the Midwest. An infested ash will show canopy dieback starting at the top, with D-shaped exit holes in the bark and increased woodpecker activity. If your ash tree has lost more than fifty percent of its canopy, removal is almost always the recommended course of action rather than treatment, because the structural wood is already compromised even if the tree is technically still alive.

2. Bark Falling Off and Fungal Growth

Bark is the tree's skin. When large sections of bark peel away and do not regrow, the cambium layer beneath it has died, and the tree can no longer transport water and nutrients through that section. You may see smooth, bare wood exposed, sometimes with a pale or grayish color. This is different from the natural bark shedding that sycamores and birches do as part of healthy growth. On species like silver maple, elm, and green ash, which are everywhere in the western suburbs, bark loss is a serious warning sign.

Fungal fruiting bodies are the other red flag to watch for. Bracket fungi (the shelf-like growths that protrude from the trunk), mushrooms at the base of the tree, and white or black powdery patches on the bark all indicate that decay fungi have colonized the interior wood. By the time you can see the mushrooms, the internal rot is usually extensive. Fungi like Ganoderma and Armillaria are common in the Chicago area and can hollow out a trunk while the bark still looks relatively intact from the outside.

3. Deep Cracks, Splits, or Cavities in the Trunk

A tree trunk works like a hollow cylinder from an engineering standpoint. The outer rings of wood carry most of the structural load. When vertical cracks open up, especially cracks that extend deep into the wood or cracks that appear on opposite sides of the trunk, the cylinder's integrity is gone and the tree's ability to handle wind and ice loads drops dramatically.

Cavities are related but different. A cavity is a hole where wood has rotted away, often starting from a pruning wound or storm damage that was never properly addressed. Small cavities are not necessarily fatal. Trees can compartmentalize decay and wall it off. But when a cavity extends more than a third of the way through the trunk's diameter, or when you can push a stick into soft, punky wood that crumbles at the touch, the remaining shell of sound wood may not be thick enough to hold.

Chicago winters make this worse. Water enters cracks and cavities, freezes, and expands, widening the opening every single year. A crack that looks minor in October can be a split trunk by March. If you notice new cracks after a hard winter, have them evaluated before the spring storm season arrives.

4. Significant Lean That Was Not Always There

Many trees grow at a natural lean and live that way for decades without issue. The concern is when a tree that was previously upright begins to lean, or when an existing lean increases. A new lean means the root system is failing on one side. You may see soil heaving up on the side opposite the lean, or a gap opening between the root flare and the ground.

In the clay-heavy soils that are common across Stickney, Berwyn, and Riverside, root stability depends heavily on soil moisture. A prolonged dry spell followed by heavy rain can cause the clay to soften and shift, letting a compromised root system give way. Construction activity, including trenching for utilities, driveway work, or basement waterproofing, can sever major structural roots without anyone realizing the damage until the tree starts to lean months or years later.

A leaning tree with exposed or lifting roots is one of the most urgent situations we respond to. Unlike a dead branch that might fall, a whole-tree failure in this scenario can bring thousands of pounds of wood down across a property line, onto a structure, or into the street. If your tree has developed a lean, schedule an assessment as soon as possible rather than waiting to see if it stabilizes.

5. Root Damage and Heaving

Roots are the foundation, and unlike the canopy, you cannot easily see their condition. But there are signs that point to serious root problems. Mushrooms growing in a ring or cluster at the base of the tree suggest root rot. Soil that is cracked or raised on one side of the trunk indicates roots are pulling out of the ground. Severed roots from recent excavation work, visible as cut ends in a trench, reduce the tree's anchoring capacity in proportion to how many were cut and how close to the trunk the cut occurred.

Root decay from species like Armillaria (honey fungus) is particularly common in older neighborhoods across the Chicago suburbs. This pathogen spreads underground from tree to tree through root grafts and through the soil via black, shoestring-like rhizomorphs. A tree with advanced Armillaria root rot can look perfectly healthy above ground until it simply falls over in a moderate wind event because there is nothing left below ground to hold it up.

If you have recently had construction, grading, or utility work within the drip line of a mature tree, the root damage from that work may not manifest as visible decline for one to three years. Keep a close eye on any tree whose root zone was disturbed.

What to Do Next

If your tree is showing one or more of these signs, the most important step is to get a professional evaluation before making any decisions. Not every tree with a crack needs to come down, and not every leaning tree is about to fall. But the assessment needs to happen promptly, especially heading into storm season.

At County Tree Service, we perform hazard tree assessments for homeowners across Stickney, Berwyn, Riverside, Oak Park, and the surrounding Chicago suburbs. Our crew evaluates the full picture: species, structure, site conditions, and proximity to targets like homes, power lines, and walkways. If removal is the right call, we handle it safely and completely, including stump grinding. If the tree can be preserved with targeted pruning or cabling, we will tell you that instead.

Call us at (708) 484-4808 or book your free estimate online. View our full range of tree care services to see how we can help protect your property and your trees.