How to Tell If a Tree Is Healthy Enough to Keep

A tree is worth keeping if it has a solid trunk, healthy bark, and no major dead limbs

A tree is worth keeping if it has a solid trunk, healthy bark, and no major dead limbs. That is the quick verdict. If the trunk is hollow or cracked, if large dead branches hang over a roof or driveway, or if the tree leans more than a few degrees without a known cause, removal is the safer choice. Everything below explains how to check those three things without climbing or guessing.

Start with the trunk because it carries the most weight and is the hardest part to replace. A sound trunk feels solid when you press a screwdriver handle against it. If the tool sinks in easily, the wood inside may be soft or decayed. Look for vertical cracks wider than a pencil, missing bark in patches larger than your hand, and any place where the trunk meets the ground and looks swollen or sunken. Those are signs the tree may be failing at the base, which is where most sudden failures start.

What do the leaves and bark tell you?

Leaves and bark tell you whether the tree is fighting something now or has been losing ground for years. A healthy tree puts out a full crown of leaves in spring and holds them until fall. If the crown is thin, if whole limbs are bare while others leaf out, or if leaves are smaller and paler than they were last year, the tree is under stress. That stress may come from drought, compacted soil, root damage from construction, or a disease that has been building for more than one season.

Bark is the tree's skin, and it should be tight and continuous. Loose bark that peels away from the wood, mushrooms growing at the base, and dark streaks running down the trunk are all signs that decay has moved into the structural wood. Mushrooms at the base are especially telling because they feed on dead wood, and their presence means the tree has already lost some of its strength where it matters most. A single patch of missing bark on one side is less alarming than bark that is loose all the way around the trunk.

Look up before you look down. Dead branches that have lost their bark and show bare, gray wood are called deadwood, and they can drop without warning. A tree with a few small dead twigs in the interior is normal. A tree with dead limbs the size of your arm, especially ones hanging over a house, a driveway, or a sidewalk, is a removal candidate unless those limbs are pruned out first. The difference is whether the deadwood is small and scattered or large and positioned over something you care about.

Size and lean: when a tree is too big or too tilted to keep

A tree that leans more than 15 degrees from vertical, or that has started leaning recently, should be assessed for removal. A tree that has leaned the same way for decades and still has a full crown is often fine, because it grew into that shape. A new lean is different. New lean usually means the root plate is moving, and that can happen after heavy rain, after soil disturbance, or after roots on one side have been cut. If you can see soil cracked or raised on the side opposite the lean, the tree is already tipping and should come down.

Size matters because big trees fail with more force and cost more to remove. A mature oak is 60 to 80 feet tall, and a tree that size near a house needs a removal plan that protects the roof, the siding, and anything underneath. The same tree in an open field is a simpler job because there is room to drop it. When you look at a big tree, ask where it would land if it fell tonight. If the answer includes a bedroom, a power line, or a driveway you use every day, that tree needs a closer look even if it looks healthy from the ground.

Roots are the part you cannot see, and they are often the reason a tree that looked fine comes down in a storm. Roots spread wider than the branches, and they need oxygen, water, and undisturbed soil. Parking a car on the root zone, piling dirt against the trunk, or paving over the area can kill roots over a few years. A tree that has lost roots on one side may still look green while it is slowly becoming unstable. If you have done digging, grading, or construction near a large tree in the last five years, mention it when you ask for an assessment.

Keep or remove: a side-by-side look at the signs

The table is a starting point, not a final answer. A tree can show one sign from the remove column and still be worth keeping if the problem is small and can be corrected. A tree can show no signs at all and still be a risk if it has a history of dropping limbs or if it sits in soil that stays wet. The only way to know for certain is to have the tree looked at from the ground and, when needed, from above.

What raises the price of removal and what lowers it

The price of a removal depends on how hard the tree is to reach, how much of it has to come down in pieces, and what is underneath it. A tree in an open yard with a clear drop zone is the simplest job. A tree leaning over a roof, a fence, or a power line has to be taken down in sections, and each section has to be rigged and lowered rather than dropped. That takes more time, more rope work, and more people on the ground, and those are the things that move the number.

Access is the other big driver. If a truck and chipper can park next to the tree, the work goes faster. If the tree is behind a gate, across a lawn that cannot be driven on, or at the back of a lot with no alley, the crew has to carry everything by hand. That adds hours. The size of the tree matters too: a mature oak at 60 to 80 feet tall is a different job than a 20-foot ornamental. The condition of the wood matters as well, because a tree with rot in the trunk may not hold a climber's weight and has to be handled with a bucket truck or a crane instead.

What lowers the price is a clear drop zone, easy access, and a tree that is already dead and dry. What raises it is anything that forces the crew to work in pieces: proximity to structures, wires, fences, or other trees, a lean that makes the direction of fall unpredictable, and a trunk that cannot be trusted to support rigging. When you ask for a quote, ask what part of the job is driving the number. Ask whether the stump is included or priced separately. Ask where the wood goes and who hauls it. Those answers tell you more than a single total ever will, because they show you what the crew expects to run into.

When to call instead of deciding on your own

Call for an assessment if the tree is within falling distance of a house, a driveway, a power line, or a place where people sit. That distance is roughly one and a half times the tree's height, so a 60-foot tree is a concern for anything within about 90 feet. You do not need to know what is wrong before you call. You need to describe what you see: the lean, the dead limbs, the mushrooms, the crack, the bare crown. A description from the ground is enough to start, and the person who comes out can tell you whether the tree can be pruned, cabled, or should come down.

Do not put off a call if the tree has changed in the last year. Trees decline slowly and then fail quickly. A tree that dropped a large limb last summer is more likely to drop another one this summer, because the same defect that caused the first failure is still there. A tree that leafed out late and never filled in is running out of stored energy. A tree that has a new lean after a wet spring may be sitting on a root plate that has already started to move. None of those things fix themselves, and waiting through another storm season only raises the chance that the decision gets made for you.

If you are in the Evansville area and want a straight answer about a specific tree, call us at the number on this page. We look at the tree, tell you what we see, and explain what removal would involve if that is the route you choose. You do not have to decide anything on the call. You just have to describe the tree and where it stands.