Rock Wall Landscaping — Garden Rock Walls and Boulder Edging
A bed that needs a real edge, a driveway corner that cars and the plow keep cutting, or a blank front yard that wants a few big rocks — stone set so it stays where it was put.
JMB Builders does rock wall landscaping across the Twin Cities metro and north to St. Cloud: low stacked fieldstone or limestone garden walls around beds, boulder borders along driveways and bed edges, and accent boulders set into the yard. These walls hold a bed, not a slope, so they are built on a compacted gravel bed with each stone partly buried so Minnesota frost does not roll it out of line. Priced per linear foot; boulder groupings per project.
- Priced per linear foot; boulder groups per project
- Decorative walls and borders, not slope-holding walls
- Stones set a third buried on compacted gravel
- Boulders placed with a mini skid loader
- Licensed MN contractor BC809005
A garden rock wall is a border, not a retaining wall. It stands knee-high or lower, it holds a raised bed or frames a flat one, and there is no slope pushing on it. That changes how it is built: no engineer, no drain tile, no geogrid. What it still needs is a base, because a stone set on topsoil will heave in the frost, tip in the spring and end up sitting crooked in the mulch within a few years. We dig a shallow trench along the line, compact a bed of class 5 or clean gravel in it, and set each stone partly buried so the frost lifts the whole wall evenly and it settles back where it was.
Boulder edging is the same idea with bigger stone. A row of boulders along the edge of a driveway stops cars and the plow from cutting the corner and tearing up the lawn. A boulder border around a bed replaces plastic or steel edging with something that does not pop up. Each boulder is set with a mini skid loader on a compacted gravel pad with roughly the bottom third buried, so it looks like it grew there and does not roll when the ground moves or a bumper touches it. Accent boulders in a front yard or a rock bed are placed the same way: buried a third, flattest face down, best face to the house, grouped in odd numbers with the biggest one set first.
Stone choice is mostly about look and about where it comes from. Minnesota fieldstone, the rounded glacial rock, gives a soft mixed-color wall and is usually the least to buy. Cut limestone stacks flat and tight for a neater wall around a formal bed. Granite boulders hold their color and edges. We source it from a supply yard by the ton, have it delivered, and set it; small stone by hand, boulders by machine. If the wall you are picturing holds back a hill, is taller than your knee, or has a patio or driveway above it, that is a retaining wall and it is on a different page.
What you supply
- The stone: fieldstone, cut limestone or granite boulders, picked at a supply yard or from photos; we order and have it delivered
- Where the wall or border goes and how high; a garden hose laid on the lawn is the easiest way to show us a curve
- For a driveway border: where cars and the plow cut the corner, and how far off the pavement you want the boulders
- Access for a mini skid loader to reach the boulders' spots, and a place to dump the stone
- Plants, mulch or rock for the bed behind the wall, or have us do it as a separate line
What JMB supplies
- A layout walk, marking the line and the boulder spots with paint, and the utility locate before digging
- A trench dug along the wall line and a compacted class 5 or clean gravel bed under every stone
- Fieldstone or limestone stacked by hand, largest stones at the bottom, a slight lean into the bed, cut or fit at the ends
- Boulders set by mini skid loader, bottom third buried, flattest face down, best face out
- Soil, mulch or rock pulled back and replaced around the finished stone
- Landscape fabric behind a raised bed wall where it holds soil, so the fill does not wash through
- Haul-off of the old plastic or steel edging, timber border or broken stone we replace
- Photos of the finished wall or border in your job folder
How it is priced: per linear foot
Quoted in writing from your photos within one business day. What moves the number:
- Length of the wall or border, and how high the wall is stacked
- Stone type: local fieldstone vs. cut limestone vs. granite boulders, all priced by the ton
- Boulder size: bigger stones cost more each and need the machine; smaller stone is set by hand
- Curves and corners, which take more fitting than a straight run
- A raised bed behind the wall that needs fill and fabric
- Machine access to the spots: an open front yard vs. a back corner through a gate
- Removing old edging, a timber border or a collapsed rock pile before the new stone goes in
- Planting, mulch or landscape rock in the bed, quoted as separate lines
Send a photo along the bed or driveway edge and one from farther back showing the house, and say roughly how high you want the wall or how big the boulders. Most rock border jobs are quoted from the photos.
How long it takes
Our estimate: a boulder border along a driveway or a low garden wall around one bed is a one-day job once the stone is delivered; a front yard with several walls and accent boulders, two to three days.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
Low stacked fieldstone garden wall
Rounded Minnesota fieldstone stacked two or three courses around a bed or along a walk, on a compacted gravel bed, the bottom course partly buried. The classic farmhouse and cabin bed edge.
Cut limestone bed wall
Flat limestone stacked tight around a formal bed or along a foundation planting, ends squared, top course level. Neater than fieldstone and holds a raised bed of soil a little better.
Boulder border along a driveway
A line of boulders set a third buried along the driveway edge or at the corner cars and the plow keep cutting. Spaced so a mower fits between or set tight as a continuous edge; set back from the pavement so the plow blade clears them.
Boulder edging around beds
Boulders replacing plastic, steel or timber edging around beds and rock areas. Mixed sizes set at the same depth so the tops line up, curves following the bed. Nothing to pop up in the frost or get hit by the trimmer.
Accent boulders in the yard
One large boulder or a group of three or five set into a bed, a rock garden or the lawn, buried a third, best face to the house. Often paired with a landscape rock bed or a planting.
Rock Wall Landscaping — Garden Rock Walls and Boulder Edging: questions, answered
What is the difference between a garden rock wall and a retaining wall?
A garden rock wall frames or raises a bed on flat ground; nothing is pushing on it but the soil in the bed. A retaining wall holds back a slope, a driveway or the ground under a patio, and it needs a deeper base, drainage stone and a pipe behind it, and above a certain height an engineer. If your wall is knee-high or lower and there is no hill behind it, it is a garden wall and this page covers it. If it holds a slope, see the boulder or block retaining wall pages.
How deep should landscape boulders be buried?
About a third of the boulder's height, on a compacted gravel pad, with the flattest face down. A boulder sitting on top of the soil looks like it was dropped there and it rolls when the ground heaves or a bumper touches it. Buried a third, it looks like it belongs and the frost lifts the whole stone and sets it back down in the same seat. Bigger boulders and boulders along a driveway go a little deeper.
Can boulders along the driveway stop cars from cutting the corner?
Yes, that is the usual reason for a driveway boulder border. Boulders set a third buried along the edge or at the corner mark it clearly and a bumper that touches one moves the car, not the boulder. They are set back far enough from the pavement that a plow blade clears them and marked with driveway stakes for the winter, because a plow that hits a buried boulder loses. Spaced boulders let a mower between; a tight row is a solid edge.
Do low rock walls need drainage behind them?
Not the drain pipe and drainage stone a retaining wall needs. A garden wall that raises a bed holds a foot or two of planting soil on flat ground, and a dry-stacked wall drains through its own joints. What it needs is a compacted gravel bed under the stones so they do not heave unevenly, and landscape fabric behind it where it holds fill so the soil does not wash out through the face. Grade the bed so water runs into the planting, not against the wall.
What kind of rock is used for garden walls in Minnesota?
Fieldstone is the most common: rounded glacial rock in mixed grays, browns and reds that comes from local fields and gravel pits and stacks into a soft, natural wall. Cut limestone stacks flat and tight for a neater look around a formal bed. Granite boulders hold their color and edges and are the usual choice for accent stones and driveway borders. All of it comes from a landscape supply yard by the ton; we pick it with you from what the yard has.
Will a rock wall or boulder border shift in the frost?
Not when it is set right. Frost lifts anything sitting on wet soil, so a stone set on topsoil will tip and end up crooked in a few years. Stones set on a compacted gravel bed and partly buried lift evenly and settle back into the same seat. A dry-stacked garden wall has no mortar to crack, so a little movement does nothing to it. If a stone ever does walk out of line, it is lifted and reset in an hour; nothing has to be torn out.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and for the builders and dealers we sub for. Counts come straight from our job log; no customer names.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 27, 2026 · JMB Builders LLC, MN license BC809005 · All pavers pages
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