Once a stump is ground, its roots die and slowly decay underground. They can no longer draw energy from leaves or push up new growth from the stump itself, so fungi and soil microbes break them down over a period of years. Large roots from a mature tree take the longest. Most Evansville homeowners notice nothing more than a little soil settling, plus the occasional soft spot where a big root used to run.
A living tree is a loop. Leaves make food, roots store and spend it, and the stump and trunk move resources between them. Grinding breaks that loop at its center. The grinding wheel destroys the stump and the flare where the biggest roots join it, which is the part of the tree best able to produce new shoots.
In the first months, the roots look almost unchanged if you were to dig one up, but they are no longer alive in any useful sense. They cannot sprout leaves, and any stored energy drains away quickly. Fungi move in first, softening the wood from the outside, and bacteria and insects follow. Above ground, the only sign is the mulch-filled depression where the stump stood, gradually compacting.
Evansville’s warm, moist summers speed decay along compared with drier regions. Small roots, the width of a finger, may disappear within a year or two. Medium roots commonly take three to five years to become soft and crumbly. The largest structural roots of an old oak or sweetgum can persist for a decade or more, slowly hollowing as they rot. Clay-heavy soil holds moisture that helps fungi, but it also slows oxygen, so deep roots in dense clay tend to outlast shallow ones.
Certain species fight back. Locust, elm, hackberry, tree of heaven, and some willows and poplars can send up suckers from roots at a distance from the stump, because those roots carry buds that respond when the main tree disappears.
Pull or cut suckers as soon as they appear, and keep at it through the first growing season. Each shoot you remove early spends a little of the root’s remaining stored energy without replacing it, since you are taking its leaves before they can feed the root. Most yards see the sprouting fade within a season or two. If a stump is still fighting before it is even ground, that is one of the clearest arguments in the stump grinding versus stump removal comparison for thinking through your options early.
A ring of mushrooms at the old stump line is not regrowth at all. It is the decay process working as it should, fruiting at the surface. Mushrooms on a living tree nearby, though, deserve a closer look, because on a standing tree they can signal internal decay.
As roots decay, the soil that surrounded them shifts into the space they occupied. Above a large root run, the lawn may dip slightly. Above the stump itself, the ground chips settle first, which is why the spot often needs a top-up of soil in the first year.
The practical fix is simple. Rake out excess wood chips if you plan to grow grass, since thick chips compete with seed for nitrogen. Add topsoil in a shallow layer, compact it lightly, seed, and water. If the area dips again the following year, repeat with a thinner layer. Most spots stabilize once the biggest void, the stump pocket itself, has finished settling.
A sudden, deep hole is different from gradual settling. If a depression opens quickly, drops several inches at once, or appears far from the stump, have it looked at rather than simply filling it. Buried debris, an old cistern, or a drainage problem can hide under Evansville lawns, especially in older neighborhoods, and a stump is not always the cause.
Dead roots do not grow, so they cannot crack a driveway or invade a pipe the way living roots can. They shrink as they decay rather than expand. The one exception is timing: roots that were already pressing against a walk or a foundation before grinding do not retreat overnight, they just stop getting worse. If a living tree elsewhere in the yard is lifting concrete, that is a separate problem with a separate answer, and our stump grinding service in Evansville page explains how the stump side of that work is handled.
Still have a stump that needs to go? Our tree services overview shows how grinding fits into the rest of the cleanup.
Decay takes years, and the size of the roots sets the pace. Fine roots can vanish within a year or two, medium roots usually soften and collapse within three to five years, and the thickest roots from a mature hardwood may still be present, though rotten and hollow, after ten years. Warm, moist soil like much of the Evansville area generally speeds the process along.
No, roots cannot keep growing once the stump is ground. Growth requires energy from leaves, and the tree no longer has any. A few determined species can push temporary suckers from stored energy in the roots, but those shoots exhaust the supply when they are cut back, and the root system dies completely rather than establishing a new tree on its own.
Building over the area is usually fine once the surface has settled, but timing matters. A patio or walk built immediately over a fresh stump pocket can shift as chips compact and big roots decay underneath. Most homeowners either wait a season and top up the soil as it settles, or choose full stump removal when construction is planned for the exact footprint.
Decaying wood can attract insects that feed on dead material, including termites in some cases. The risk is mainly a concern when the stump sits right against a house foundation. Keeping the ground stump area a reasonable distance from the home, removing excess surface chips, and keeping up with regular home pest inspections are sensible precautions for any Evansville property with old stumps near the structure.
Tell us where the stump sits and what you have noticed, and we will explain what is happening underground and what to do about it. Call (844) 542-2293 to get an estimate, and see the areas we cover on our Evansville service locations page.