--- title: "How Deep Does Stump Grinding Go? Typical Depths" description: "How deep does stump grinding go? Extension sources say 8 to 12 inches is typical, from flush to over a foot. See what depth costs and how it affects planting." url: https://cincystump.multisites.ai/guides/how-deep-does-stump-grinding-go publisher: Cincinnati Stump Grinding phone: +1-513-587-6772 quote: https://cincystump.multisites.ai/contact --- # How deep does stump grinding go, and how deep should you ask for? Iowa State Extension says grinders typically take the stump and large lateral roots down 8 to 12 inches. The University of Illinois Extension says depth runs from flush with the soil line to over a foot deep. Deeper grinding often costs more, so choose the depth that fits your plan for the spot. GuideUpdated October 26, 20264 min read ## Typical range Iowa State Extension says 8 to 12 inches for the stump and large lateral roots. ## Wide spread The University of Illinois Extension says depth can run from flush with the soil line to over a foot. ## Deeper costs more The University of Illinois Extension says that often, the deeper the grind, the more it costs. ## Plan for replanting Purdue Extension says it can take several years to fully decompose a stump unless it was ground very deeply. ## How deep does stump grinding go? Stump grinding usually goes 8 to 12 inches below the soil line. Iowa State Extension says grinders will chew away the stump and any large lateral roots, typically down 8 to 12 inches. The University of Illinois Extension gives a wider range, from flush with the soil line to over a foot deep. So there is no single depth. The real answer is a range, and the number depends on the machine, the stump and what you plan to do with the spot. The full process is in [how stump grinding works](https://cincystump.multisites.ai/guides/how-stump-grinding-works). Source Depth stated Notes Iowa State Extension 8 to 12 inches, typically Covers the stump and any large lateral roots. University of Illinois Extension Flush to the soil line, to over a foot deep Depends on the type of grinder. EquipmentShare (equipment rental company) 6 to 8 inches below ground level Stated as the stopping point in its how-to steps. ## What does “flush” or “below grade” mean? Flush means the ground-up wood is level with the soil surface. [Below grade](https://cincystump.multisites.ai/glossary/below-grade) means it is deeper than the surrounding ground. A [flush cut](https://cincystump.multisites.ai/glossary/flush-cut) leaves the least room for soil. A deeper cut leaves a larger hole, which you can fill. The term [grinding depth](https://cincystump.multisites.ai/glossary/grinding-depth) describes how far under the surface the wood is removed. The University of Illinois Extension warns that depending on how far down a stump is ground, you may be left with a large hole. That hole holds chips. What happens to the chips is a separate step. Read [what to do with stump grindings](https://cincystump.multisites.ai/guides/what-to-do-with-stump-grindings) for the options. ## Can I ask for a deeper grind? Yes, you can ask. Say what you plan for the spot when you request a quote. The company then knows whether it needs a shallow cut for a mower or a deeper cut for planting. Whether a company offers a custom depth, and what it charges, is a question for that company. Ask about it when you request your free estimate. Write down the depth you agree to. A line such as “grind to 10 inches below the soil line” is clearer than “deep enough.” Ohio’s Attorney General advises that a home improvement contract should include a complete description of the work to be done. That advice is general and applies to any written agreement. ## Does a deeper grind cost more? Often it does. The University of Illinois Extension says that often, the deeper you want a stump ground out, the more it will cost you. Iowa State Extension says arborists will charge by the size of the stump, measuring it at its widest point. Both factors can raise a quote: a wider [stump diameter](https://cincystump.multisites.ai/glossary/stump-diameter) and a deeper cut. Prices vary by company, so this guide does not give one. See [stump grinding cost](https://cincystump.multisites.ai/guides/stump-grinding-cost) for reported prices with their sources. Ask each company what is included. ## What depth makes sense for replanting? If you want to plant, deeper helps. Purdue Extension says it can take several years to fully decompose a stump unless it was ground very deeply or removed with an excavation machine. Purdue also says the ground over a stump will settle as the remains decay, so plan to add soil. That settling is called [soil settling](https://cincystump.multisites.ai/glossary/soil-settling). For grass, the University of Illinois Extension advises hauling off the chipped debris and filling the hole with quality [topsoil](https://cincystump.multisites.ai/glossary/topsoil). It says wood mixed into soil can tie up nitrogen as it breaks down, which makes it hard to grow a lawn. Details are in [can you plant grass after stump grinding](https://cincystump.multisites.ai/guides/can-you-plant-grass-after-stump-grinding) and [can you plant a tree after stump grinding](https://cincystump.multisites.ai/guides/can-you-plant-a-tree-after-stump-grinding). ### Which depth fits which plan? Your plan What to ask for Why Mow over the spot A cut below the soil line, with chips raked or hauled The surface needs to be level and clear. Plant grass A deeper cut, chips hauled away, hole filled with topsoil The University of Illinois Extension recommends this for turf. Plant a new tree A deeper cut, and a talk with the company about spacing Purdue Extension advises against planting new trees or turf directly over a stump. Leave it for now Whatever depth the company suggests Chips will settle either way. ## How can you check the depth after the job? Measure it yourself and agree on the method up front. Press a ruler or tape measure into the chips at the center of the spot, and compare the number with the depth you asked for. Chips sit loosely, so the reading may be a little off. Ask the company to say how it measures depth: from the original soil line, or from the stump’s cut surface. Those two starting points can differ by several inches. Take a photo before and after. A photo with a tape measure in frame is the clearest record. If you plan to fill the hole with topsoil, the depth also tells you how much soil to order. The University of Illinois Extension notes you may be left with a large hole, so do not guess the amount of soil. See [how to clean up after stump grinding](https://cincystump.multisites.ai/guides/how-to-clean-up-after-stump-grinding). ## What does the grinder not reach? The grinder reaches the stump and the large roots near it. Roots farther out and deeper stay in the soil. They break down over time. Iowa State Extension says its 8 to 12 inch figure covers the stump and large lateral roots. For root questions see [should you remove roots after stump grinding](https://cincystump.multisites.ai/guides/should-you-remove-roots-after-stump-grinding) and [exposed surface roots](https://cincystump.multisites.ai/guides/exposed-surface-roots). ## Next step Once you know the depth you want, see [how long stump grinding takes](https://cincystump.multisites.ai/guides/how-long-does-stump-grinding-take) to plan the visit. Call (513) 587-6772 or [send photos for a free estimate](https://cincystump.multisites.ai/contact). ## Frequently asked questions ### How deep does a stump grinder go? Iowa State Extension says professional machines typically grind the stump and large lateral roots down 8 to 12 inches. The University of Illinois Extension says depth can range from flush to the soil line to over a foot. Machine size and the stump itself set the limit. ### How deep should I grind a stump if I want to plant grass? Deeper grinding leaves more room for soil. The University of Illinois Extension advises hauling off the chipped stump debris and filling the hole with quality topsoil before planting turfgrass. Tell the company your plan before the visit so the depth and cleanup match. ### Does grinding deeper cost more? Often yes. The University of Illinois Extension says that often, the deeper you want a stump ground out, the more it will cost you. Iowa State Extension adds that arborists charge by the size of the stump. Ask each company how depth changes its quote. ### Does grinding remove all the roots? No. Iowa State Extension says grinders take the stump and any large lateral roots, typically down 8 to 12 inches. Roots beyond that range and below it stay in the ground and break down over time. ## Terms on this page - [Excavation (Ohio law)](https://cincystump.multisites.ai/glossary/excavation-ohio-law) - [Stump grindings](https://cincystump.multisites.ai/glossary/stump-grindings) - [Grinding depth](https://cincystump.multisites.ai/glossary/grinding-depth) - [Stump diameter](https://cincystump.multisites.ai/glossary/stump-diameter) - [Lateral roots](https://cincystump.multisites.ai/glossary/lateral-roots) - [Soil settling](https://cincystump.multisites.ai/glossary/soil-settling) - [Surface roots](https://cincystump.multisites.ai/glossary/surface-roots) - [Below grade](https://cincystump.multisites.ai/glossary/below-grade) - [Flush cut](https://cincystump.multisites.ai/glossary/flush-cut) - [Topsoil](https://cincystump.multisites.ai/glossary/topsoil) ## Sources 1. [Iowa State Extension: How to remove tree stumps](https://yardandgarden.extension.iastate.edu/how-to/how-remove-tree-stumps) 2. [University of Illinois Extension: What to do with that tree stump?](https://extension.illinois.edu/blogs/good-growing/2025-07-18-what-do-tree-stump-guide-tree-stump-removal) 3. [EquipmentShare: What Is Stump Grinding? How Stump Grinders Work In Practice](https://www.equipmentshare.com/articles/what-is-stump-grinding-how-stump-grinders-work-in-practice) 4. [Purdue Extension: Can I plant grass over a newly removed stump?](https://extension.purdue.edu/news/2021/06/Question-Can-I-Plant-Grass-Over-Newly-Removed-Stump.html) 5. [Ohio Attorney General: Consumer Tips Home Improvement (description of work)](https://www.ohioattorneygeneral.gov/Individuals-and-Families/Consumers/Consumer-Tips/Consumer-Tips-Home-Improvement) Written by Cincinnati Stump Grinding and checked against the sources above on October 26, 2026. City rules and product guidance change, so check the linked page before you act. ## Keep reading - [How long does stump grinding take, from setup to cleanup?Iowa State Extension says a ground stump is gone within a matter of hours. A rental-equipment article gives a range of 15 minutes to several hours, depending on stump size and wood hardness. Setup, access and cleanup add time before and after the grinding itself.](https://cincystump.multisites.ai/guides/how-long-does-stump-grinding-take) - [How stump grinding works, from the first pass to the pile of chipsA stump grinder swings a spinning wheel with teeth across the stump and chips the wood away, usually to 8 to 12 inches below the soil line. Iowa State Extension says the stump is gone within a matter of hours. A pile of chips stays in the hole unless you ask for removal.](https://cincystump.multisites.ai/guides/how-stump-grinding-works) - [Should you remove the roots after stump grinding?Usually no. Iowa State Extension says a grinder removes the stump and large lateral roots, typically down 8 to 12 inches, and the rest decays over time. Remove roots only if they block a pipe, patio, footing or new planting. Digging is labor-intensive and needs utility marks first.](https://cincystump.multisites.ai/guides/should-you-remove-roots-after-stump-grinding) - [Can you plant a tree after stump grinding? Same spot or a new spotYes, but not directly over the old stump. Purdue Extension says it does not want new trees planted immediately over existing stumps, because the spot has limited soil depth, settles, and the ground wood ties up nitrogen. Plant a short distance away, or fill the hole and wait. Locate underground utilities first.](https://cincystump.multisites.ai/guides/can-you-plant-a-tree-after-stump-grinding) - [Can you plant grass after stump grinding? Steps from extension sourcesYes, you can plant grass after stump grinding once the hole is filled. Purdue Extension advises adding soil with a little extra mounded for decay, then planting sod, or seed if you prefer, and adding slow-release turf fertilizer. Illinois Extension advises hauling off the chips first.](https://cincystump.multisites.ai/guides/can-you-plant-grass-after-stump-grinding) - [Exposed surface roots in the lawn: why they appear and what to doSurface roots appear because most tree roots grow in the top 4 to 15 inches of soil and thicken every year. Wisconsin Extension says not to hit them with a mower or prune them away. It suggests covering them with about a half inch of topsoil, or replacing the grass with mulch.](https://cincystump.multisites.ai/guides/exposed-surface-roots)