Stump Grinding vs. Stump Removal: Which Is Right for Your Yard?

What is the difference between grinding and removal?

Grinding uses a machine with a toothed cutting wheel to chew the stump into chips, working down below the soil surface. The roots that run out from the stump stay in the ground and decay over time. Full removal, sometimes called extraction or grubbing, takes out the stump and the root crown as one mass, which means digging around it, cutting the main roots and lifting it free.

Grinding leaves a shallow depression full of wood chips. Extraction leaves a real hole and a large, heavy, dirt covered stump that has to go somewhere. That is the practical difference, and it is why grinding is the usual answer in a finished yard.

What does stump grinding involve, and what is left behind?

Iowa State University Extension calls stump grinding the quickest, easiest and safest option for stump removal. University of Illinois Extension notes that grinders can take a stump down to different depths, from flush with the soil line to more than a foot deep, and that the deeper you want it ground, the more it will often cost.

What stays behind is the part people do not expect. Iowa State explains that a large pile of wood shavings remains in the hole, that most arborists will not remove that material or fill the hole unless asked, and that both services typically cost extra. Illinois adds that the grindings usually get mixed into the surrounding soil as the wheel works, and that wood mixed into soil can tie up nitrogen as it breaks down, making it hard to grow lawn or another plant in that spot. Both recommend hauling off the chipped debris and filling with good topsoil if you plan to plant grass there.

So when you ask for a grinding quote, ask three questions. How deep will it be ground? Do the chips stay or go? Is topsoil and seed included, or is the area left for you to finish?

When does full stump extraction make sense?

Extraction makes sense when the roots themselves are in the way: a foundation, a driveway, a new irrigation line or a garden bed that needs clean soil to full depth. It is also realistic for small stumps. Iowa State describes digging out as very labor intensive but quick, and workable on smaller stumps of roughly a foot in diameter or less. It involves trenching around the stump, sawing through the lateral roots and prying the stump free. The same page says plainly that digging or pulling the stump of a larger tree is not practical. Illinois is more conservative still, with its author saying he would not hand dig much past a six inch trunk.

For a big stump, extraction means heavy equipment, a large disturbed area and a hole to backfill and compact. If a project truly needs stumps pulled with an excavator, that is a job for an excavation contractor. We are glad to look at the site and tell you which kind of job you have.

Can you just leave the stump?

Yes, and sometimes it is the right call. Iowa State points out that dead stumps provide food and shelter for insects, birds and other wildlife, and suggests considering it where the stump is out of the way and poses little risk. On acreage at the edge of the yard, a stump cut low can simply be left.

The cost of leaving it is time and what happens in the meantime. Iowa State says natural decay can take ten years or more depending on soil moisture, decay fungi and tree species. A stump in a mowed lawn is something to steer around for that whole period, and in our dry summers decay is not fast. For species that sprout, leaving the stump also means dealing with shoots, which is the next question.

Why do aspen and cottonwood keep coming back?

Because the tree was never only the trunk. Utah State University Extension explains that quaking aspen sprouts profusely from its root system, especially when the main tree is weakened, dies or is removed, and that as long as the root system is alive it will keep sending up sprouts. It warns that after a large yard aspen is cut down, it may take up to two years of cutting and treating sprouts to be rid of them. Utah State's forestry extension adds a detail that surprises people: cutting the roots to dig out sprouts encourages more sprouting along the cut roots.

Cottonwood behaves in a related way. The USDA Forest Service's silvics reference for black cottonwood, our native river bottom cottonwood, says the species sprouts readily from stumps and that sprouting from roots has also been reported.

Grinding removes the stump, which removes the stump sprouts. It does not remove a living root system that runs under the lawn. If you are taking out an aspen in Missoula or the Bitterroot, plan for a period of sprout control afterward and say so when you ask for the quote. Our guides to quaking aspen problems and cottonwoods near houses go into both species.

Do chemical stump removers and stump killers work?

These are two different products, and they get confused. Stump removers are sold to speed decay. Iowa State says these products tend to be simply a form of fertilizer, often potassium or sodium nitrate, and that regular fertilizers can work just as well. Illinois cites University of Georgia work estimating that chemical treatment speeds decomposition by about a quarter, while encouraging natural decay with more surface area, air, moisture and nitrogen can do about twice that. Neither is quick. Iowa State's estimate for a drilled and treated stump is one to three years before it can be broken up with a spade.

Stump killers are herbicides meant to stop resprouting. Iowa State says applying herbicide to the stump right after cutting can help reduce resprouting, names glyphosate, triclopyr and imazapyr as active ingredients used for this, and advises avoiding products containing picloram because it leaches easily and stays active in soil for a long time. It also warns that herbicide poured over a stump well after removal will only leach into the soil and may damage nearby plants. Utah State describes painting triclopyr or glyphosate onto fresh cut surfaces of aspen within hours, and cautions that treating sprouts while the parent tree is still standing is risky for that tree.

That is what the extension sources say, and it is general information. The product label is the law, it sets the rate and the method, and some products are restricted to licensed applicators. Both extension pages advise against burning stumps out.

What do you need to do before any stump work?

Have buried utilities located. Montana 811 says the locate request is free, and its homeowner page says it is the homeowner's responsibility to file one at least three business days before beginning any excavation project. It also cautions that private underground facilities may not be located through the system. In a yard that usually means irrigation lines, low voltage lighting, propane lines and wiring to a shop, which you or your irrigation contractor need to mark.

What drives the cost of stump work?

Stump diameter at ground level is the starting point, and old trees often flare much wider at the base than the trunk suggested. Depth is next, as the Illinois page notes. Species and age matter because hard, fresh wood grinds slower than soft or partly rotted wood. Surface roots that also need grinding add time. Access decides which machine can reach the stump, and rocks in the soil, common on valley benches, slow the work and wear teeth. Chip removal, topsoil and seeding are separate choices. Several stumps in one visit cost less per stump than one at a time.

Stump work is one of our tree services, and it is easiest to price on the same visit as the removal. If the tree is still standing, what to expect on removal day explains how the stump fits into the job. More guides are in the Montana Tree Guide.

Call HJ Property Care & Tree Service at (406) 215-7319 or request a tree assessment and an ISA Certified Arborist will look at the tree with you.

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