The honest answer is that most trees people call us about do not need to come down. A tree with a few dead limbs, some surface fungus on the bark, or a lean it has had for thirty years is usually a pruning job or an observation job, not a removal. The trees that genuinely need to go are often the ones nobody is worried about, because the failure indicators are at the base and in the root plate rather than up in the canopy where you can see them.
Start at the ground. The root flare — the point where the trunk widens out and disappears into the soil — should be visible, and it should be solid. If the flare has been buried by mulch or fill dirt for years, if there are mushrooms or shelf fungus growing out of it, or if the soil on one side of the tree has lifted or cracked, that is a serious structural problem. Fungal fruiting bodies at the base mean decay is already well established inside the root collar, and by the time a mushroom shows up on the outside, a substantial percentage of the supporting wood is usually already gone. A tree can be fully green and healthy-looking in the canopy and still be standing on nothing.
Next look at the trunk and the unions. Vertical cracks, seams, or bulges in the trunk indicate internal decay or a previous split that healed badly. A cavity is not automatically fatal — trees compartmentalise decay and can live for decades around a hollow — but the rule of thumb arborists use is the remaining shell of sound wood. Once the sound wall drops below roughly a third of the radius, the trunk's ability to resist bending in wind falls off a cliff. Co-dominant unions, where the tree forks into two competing leaders of similar diameter, are the other classic failure point, especially when bark is growing down into the fork rather than the two stems being properly joined. That included bark acts like a wedge, and those unions split in the first serious straight-line wind event.
Lean matters, but not the way most people think. A tree that has leaned for its entire life has almost certainly built reaction wood to compensate, and it may be perfectly stable. A tree that has recently started to lean — soil heaving on the opposite side, roots pulling up, mulch cracking in an arc — is a genuine emergency. The difference between an old lean and a new lean is the single most useful thing a homeowner can learn to spot.
Dead is dead, and species matters. A dead oak may stand for years and can be taken down methodically. A dead ash, and after emerald ash borer there are a great many of them across Indianapolis and Central Indiana, becomes brittle astonishingly fast. The wood loses integrity, limbs snap without warning, and climbing one is genuinely dangerous work that has to be done from a bucket or a crane rather than on spikes and rope. If you have a dead or dying ash within striking distance of a house, driveway, or play area, that is the tree to deal with first, and it gets harder and more expensive to remove the longer it stands.
Then there is the target question, which is the part homeowners often skip. Risk is hazard multiplied by consequence. A defective tree in the middle of a back pasture with nothing under it is not urgent. The same tree twelve feet from a bedroom wall is a different conversation entirely. We assess what is underneath and around the tree — structures, power lines, driveways, where people actually spend time — because a tree that could hurt someone is judged by a stricter standard than one that cannot.
Finally, be suspicious of anyone who looks at a tree for ninety seconds and quotes a removal. Removals pay better than assessments, and there are companies that never seem to find a tree worth saving. A real assessment involves walking the whole tree, looking at the root collar, sounding the trunk, and giving you an honest read — including the answer nobody makes money from, which is that your tree is fine and you should leave it alone. If you want a straight opinion on a tree in Indianapolis or anywhere in Central Indiana, call us. The estimate is free and so is the honesty.