7 Signs Your Tree Is Dying or Becoming Dangerous

By the Fort Wayne Tree Pros team · May 13, 2026

Most trees don’t fall out of nowhere. By the time a mature tree fails in a Fort Wayne yard, it’s usually been telegraphing the problem for months or years — you just have to know what to look for.

Here are the seven warning signs we tell every Allen County homeowner to keep an eye on.

1. Mushrooms or Conks at the Base of the Trunk

Shelf-like fungi (conks) or clusters of mushrooms growing at or near the base of your tree are one of the loudest red flags. They’re a sign that fungal decay is already inside the trunk — often well past the point of being treatable. Common culprits in northeast Indiana include Armillaria root rot and Ganoderma butt rot.

You can’t see the decay from the outside, but it’s hollowing out the structural core of the tree.

2. A Dead Crown or Large Dead Limbs Up Top

Look up. If the topmost branches are bare while the lower branches are leafed out, the tree is in decline. This “crown dieback” usually starts at the top and works its way down. A few small dead twigs are normal. Whole bare sections of crown are not.

Large dead limbs (“widow-makers”) are also a direct safety hazard — they can drop in any wind.

3. Bark Falling Off in Large Patches

Healthy bark stays put. When bark sloughs off in sheets and the wood underneath is dry, soft, or hollow-sounding, the tree is failing. (Note: some species like sycamore, river birch, and crape myrtle naturally shed bark — that’s different and normal.)

4. Cracks, Splits, or Cavities in the Trunk

Vertical cracks running down the trunk, or deep cavities you could put your hand into, are signs of structural weakness. A trunk crack that’s longer than a few feet should be evaluated by a professional. Same with cavities — small openings can hide large internal voids.

5. Leaning — Especially Sudden Leaning

Some trees grow with a natural lean and are perfectly stable. But if a tree has started leaning — or if you see fresh cracks in the soil on the side opposite the lean, or roots lifted up out of the ground — that’s a sign the root system is failing. A new lean after a storm is a major warning.

6. Sucker Growth Around the Trunk Base

When you see a sudden flush of small, leafy shoots coming straight out of the base of the trunk or from the roots, it’s often the tree’s stress response — an attempt to grow new tissue because the canopy is failing. Some trees do this naturally (silver maple, hackberry), but combined with crown dieback it’s a clear distress signal.

7. Carpenter Ants, Woodpeckers, or Heavy Insect Activity

Carpenter ants don’t eat wood, but they love to nest in already-soft, decaying wood. A column of carpenter ants going up a trunk usually means there’s rotten wood inside. Heavy woodpecker activity is the same story — the birds are after insect larvae living in dying wood. Both are signs to investigate.

What to Do If You See These Signs

One sign by itself doesn’t always mean the tree needs to come down. But two or more, especially on a large tree near a house, driveway, or play area, deserves a professional look. Sometimes the answer is pruning out the dead wood and monitoring. Sometimes the answer is removal.

Free Hazard Tree Assessments in Fort Wayne

If a tree on your Allen County property is showing one or more of these signs, we’ll come out and give you an honest, free assessment. No pressure to remove anything that doesn’t need to come down — just a real opinion from someone who climbs trees for a living.