By Caleb MorganUpdated November 2026
Groundsmart cobblestone landscape edging gives you a crisp, raised border that separates lawn from beds and paths. This guide walks through how to plan the layout, prepare the trench, set the sections, and finish the joints so the edge stays straight through seasons of mowing and rain. Expect a process that takes a weekend for a typical front bed, with the bulk of the time spent on leveling and backfill rather than on the stones themselves.
What Groundsmart Cobblestone Edging Is and Where It Works Best
Groundsmart cobblestone edging is a plastic or composite landscape border styled to look like rounded stone pavers. The sections interlock or stake into the ground and form a continuous barrier that stops turf from creeping into mulch and keeps mower wheels from cutting into soft soil. Manufacturers typically describe this product family as suited to flower beds, tree rings, walkways, and curved garden edges.
Shopping for one? See our guide: Groundsmart SmartLoc Cobblestone Landscape Edging: 6 Best Picks Compared (2026).
It performs best on straight runs and gentle curves. Tight radius bends, such as a circle under 3 feet across, can show gaps or kinks, so you may need to cut sections or use a flexible option instead. Because the profile is low, it is a good match for lawns that you mow regularly with a walk-behind or riding mower, since the top edge sits at or just above grade rather than acting as a sharp obstacle.
Check whether this style fits your site
- Soil that drains well and is not constantly saturated
- Beds where you want a clean line but not a tall retaining wall
- Areas where you plan to edge with a string trimmer or a manual edger afterward
- Layouts with mostly gentle curves rather than tight loops
Plan the Layout Before You Dig
Good edging starts on paper or on the ground with spray paint. Mark the full route before you buy quantities, because the number of sections depends on linear footage and any corners you plan to make. Measure the perimeter, then add roughly 5 to 10 percent for cutting waste and corrections.
Steps for marking the route
- Lay a garden hose along the intended line and adjust until the curve looks smooth from several viewing angles.
- Walk the path with a mower or wheelbarrow to confirm you have clearance for equipment on the lawn side.
- Measure each straight run and each arc, then total the length.
- Mark the line with marking paint or stakes every 3 to 4 feet so you can check alignment as you work.
- Call 811 before digging anywhere near utility lines. This is a free service in the United States and is required before excavation in most states.
Gather Tools and Materials
Having everything on site before you start keeps the trench open for a shorter time, which matters if the soil is loose or the weather is changing.
| Item | Purpose | Notes |
|---|---|---|
| Flat spade or half-moon edger | Cutting the trench line | A flat spade gives straighter walls than a round point |
| Level (4-foot or longer) | Checking top-edge height | A string line and line level work for long runs |
| Rubber mallet | Seating sections without cracking them | Avoid steel hammers on plastic |
| Crushed stone or gravel | Base for drainage and stability | A 2 to 3 inch layer is common for lighter installs |
| Landscape fabric | Separating base from soil | Helps limit weeds at the seam |
| Stakes or anchors (as supplied) | Holding sections in place | Use the spacing listed in the product instructions |
| Utility knife or saw | Trimming sections to length | Mark cuts clearly before cutting |
| Tape measure and marking paint | Layout and checks | Re-check alignment after each section |
Step-by-Step Installation
Work in short sections so you can keep the line straight and level as you go. Plan on finishing about 15 to 25 linear feet per hour for a careful first-timer, faster once you have a rhythm.
Step 1: Cut the trench
Dig along your marked line to a depth that matches the product height plus the base layer. For a 4 to 5 inch tall profile with a 2 to 3 inch base, excavate roughly 6 to 8 inches deep. Keep the walls as vertical as possible so the sections sit snug against soil. Remove sod, roots, and rocks that could create high spots.
Step 2: Build and compact the base
Spread crushed stone in the trench and tamp it in lifts of about 1 inch. Compact it with a hand tamper until it resists footprint pressure. A firm base prevents settling, which is the most common cause of wavy edging later. Lay landscape fabric over the base if you want extra weed control, folding it up the sides so it does not interfere with the sections.
Step 3: Set the first section and check level
Place the first piece at the starting point, check it with your level both across the top and along the run, and adjust the base under it as needed. Set the top edge slightly above the lawn grade, roughly 1/2 inch, so the mower deck clears it and mulch does not wash onto the grass.
Step 4: Connect and anchor each section
Join pieces according to the interlock design. Drive stakes or anchors through the designated holes at the spacing the manufacturer specifies, then tap sections down with the rubber mallet. Check alignment with your string line every few sections rather than only at the end, since small errors compound.
Step 5: Cut for corners and curves
For corners, measure the inside and outside lengths separately and cut with a fine-tooth saw. On curves, make shallow relief cuts on the inside arc so the piece bends without cracking. Dry-fit before you anchor.
Step 6: Backfill and finish
Backfill the outside of the border with soil or the same stone you used as base, compacting gently as you go. Pack the lawn side firmly so mower wheels do not sink. Rake the edge smooth and water the area lightly to settle the soil. Add mulch to the bed side after the soil has settled for a day or two.
Common Mistakes to Avoid
- Skipping the base. Sections set directly on loose soil will heave with freezing and thawing and sink in wet spots.
- Setting the top too high. A border that stands more than an inch above grade catches mower wheels and trimmer line.
- Checking level only at the end. Errors add up over a 30-foot run. Check every few sections.
- Forcing tight curves. Bending rigid pieces too far causes cracks. Cut relief notches or change the curve radius.
- Ignoring drainage. If water pools behind the edge, add a small gap or weep point in the base or regrade the bed slightly away from the border.
- Using a steel hammer. This can chip or crack composite sections. A rubber mallet is safer.
Maintenance and Long-Term Tips
Once installed, groundsmart cobblestone edging needs little beyond occasional cleaning and a check of alignment after heavy rain or freeze-thaw cycles. Sweep off grass clippings and mulch to keep the top surface clean. If a section shifts, lift it, reset the base, and re-anchor it rather than forcing it back into line. Edge the lawn side with a string trimmer or manual edger as needed; keeping grass trimmed back from the border preserves the crisp look.
If you are comparing this with other materials, the broader guide on What Are the Best Options for Landscape Edging? 7 Choices Compared lays out how different styles handle maintenance and cost of upkeep. For a closer look at alternatives with a similar stone appearance, see Top 7 Landscape Edging Faux Stone Options for Clean Garden Borders and Top 6 Stacked Stone Landscape Edging Picks for Clean Garden Borders. Readers who want a more budget-minded plastic option can compare Recycled Plastic Landscape Edging: 5 Best Picks for Clean Lines (2026). If you are weighing a close cousin of this product, the install notes in Groundsmart Brickface Landscape Edging: Install Steps and Tips for Clean Lines cover similar base and anchoring steps. For a no-trench alternative, No-Dig EasyFlex Landscape Edging: A Step-by-Step Install Guide is worth a look.
Recommended gear
These items make the install faster and the results more consistent. Search Amazon for each phrase to compare current listings.
- Rubber mallet. Seats sections evenly without chipping the edges. View on Amazon
- Four-foot aluminum level. Long enough to check the top edge across several sections at once. View on Amazon
- Hand tamper. Compacts the crushed stone base in thin lifts so the border stays level. View on Amazon
- Landscape fabric. Separates base from soil and slows weed growth at the seam. View on Amazon
FAQ
Can I install groundsmart cobblestone landscape edging on uneven ground?
Yes, but you will need to level the base section by section. Dig deeper where the ground dips and add crushed stone until the top edge matches your target height. Stepped installations are acceptable on slopes if each section is level on its own.
Do I need a concrete base?
Usually not. A compacted crushed stone base is typically enough for residential beds. Concrete is generally reserved for heavy traffic areas or very unstable soil, and should only be used if the product instructions allow it.
How deep should I bury the edging?
Bury enough to lock the section into the base, usually a few inches of the lower profile below grade, while keeping the top about 1/2 inch above the lawn. Follow the height guidance in the product instructions for your specific model.
Will a string trimmer damage the plastic?
Repeated direct contact can scuff or wear the surface over time. Trim the lawn side at a slight angle away from the border, and keep the trimmer head moving to limit contact.
Can I cut the sections with a regular saw?
Yes. A fine-tooth handsaw or a jigsaw with a blade suited to plastic works well. Mark the cut line, support the piece on both sides, and cut slowly to avoid cracking.
How do I fix a section that has sunk?
Lift the section, remove the soil or stone beneath it, add and compact fresh base material to the correct height, and reset the piece. Re-check level with a straightedge before backfilling.
Is professional installation necessary?
Most homeowners can complete a straight-run install with basic tools. For large projects, utility-crossing areas, or structural retaining needs, consult a licensed landscape contractor.
Conclusion
A clean, long-lasting border comes from three things: a compacted base, careful leveling as you work, and a top edge set just above the lawn. Plan your route, dig a proper trench, and check alignment often. With those habits in place, groundsmart cobblestone landscape edging will hold its line and keep your beds sharp for seasons to come.
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About Caleb Morgan
Caleb Morgan is part of our editorial team and reviews and edits our lawn edging & trimming guides, checking product details against manufacturer specifications and owner feedback.
