Landscape edging comes down to one thing: cutting or setting a clean, straight (or cleanly curved) trench line, then anchoring your material into it deep enough that it doesn’t heave with frost or pop loose with the first hard rain. That’s the whole job. The difference between edging that lasts fifteen years and edging that’s crooked and popping out of the ground by next spring is almost always in the trench prep, not the material you bought.
If you’re standing in the yard right now trying to figure out how to install landscape edging before the weekend’s gone, you’re in the right place. But there are a few things almost nobody gets right the first time: the depth people guess at is usually half of what’s needed, the “straight line” everyone eyeballs ends up wavy by the time they’re 20 feet in, and there’s one spot along every bed where edging fails first that most people never check.
Stick with this through to the end, because there’s a save-it-to-your-phone DIY at a Glance card at the bottom with the exact depths, spacing, and tool list, so you don’t have to scroll back through the whole thing while you’re standing in the dirt.
What You Need Before You Start Digging
You need three categories of stuff: a way to mark your line, a way to cut the trench, and the edging itself. For marking, a garden hose or a length of rope works better than string and stakes for curves, since you can shift it around until the curve actually looks right from a standing view, not just from above.
For digging, a flat spade or a half-moon edging tool does the cutting, and a narrow trenching shovel cleans out the bottom. For material, your main choices are metal or plastic strip edging, poured concrete curbing, brick or pavers set on end, or natural stone. Each has a different depth and prep requirement, which we’ll get into.
Buy 10 percent more material than your measured bed length. You’ll lose some to waste on curves and cuts.
Laying Out the Line Everyone Gets Wrong
Here’s the mistake: people mark a line, start digging at one end, and by the time they’re partway down the bed the trench has drifted a few inches off course because nobody’s checking it against anything. The fix is to lay your hose or rope for the entire run first, then walk the whole thing and adjust it before a single cut goes in the ground.
Stand back and look at curves from at least 10 feet away, not while crouched next to them. A curve that looks smooth from 2 feet away often reads as a wobble from the porch.
Once the line looks right, mark it with a thin trickle of spray marking paint, then move the hose out of the way entirely. Digging around a hose you can trip over or shift out of place is how straight lines go crooked.
With the line locked in, the actual trenching decides whether any of this holds.
Step 1: Cut the Trench
Using your spade or half-moon tool, cut straight down along the painted line to a depth of 4 to 6 inches for strip edging, and 6 to 8 inches for pavers, brick, or stone set on edge. Cut the second side of the trench angled slightly outward, away from the bed, so the edging has a solid wall of soil to lean against on the bed side.
Remove the soil and set it aside. You’ll use some of it for backfill later.
The depth mistake almost everyone makes is going 2 to 3 inches deep because that’s how deep the spade sinks on the first easy push. That’s not enough. Shallow edging heaves out of the ground with the first freeze-thaw cycle or gets shoved sideways by a string trimmer within a season.
Depth is the detail that decides everything, and we’re not done with it yet.
Step 2: Set the Edging
For metal or plastic strip edging, unroll it into the trench with the top lip sitting level with, or just slightly above, the surrounding soil grade. Drive the anchoring stakes through the built-in stake loops at the intervals the product calls for, typically every 2 to 4 feet, angling stakes slightly toward the bed for extra hold.
For brick, pavers, or stone, set each piece into the trench standing on edge, packing soil firmly underneath so each piece sits level with its neighbors. Check level every 3 to 4 pieces, not just at the start, since small high or low spots compound quickly.
For poured concrete curbing, this is the one method most homeowners hire out, since it needs form-building and correct concrete handling to avoid cracking.
Once everything’s set at the right depth and level, backfilling is what locks it in place for good.
Step 3: Backfill and Compact
Push the reserved soil back in on both sides of the edging, filling in layers rather than dumping it all at once. Tamp each layer down with your foot or a hand tamper before adding the next.
On the bed side, backfill up to grade with soil or mulch. On the lawn side, backfill with soil and either reseed or lay sod strips to close the gap.
Skipping compaction is the second-biggest failure point after shallow trenching. Loose backfill lets edging rock back and forth every time it’s stepped on or hit with a mower wheel, and within a month it’s leaning.
That rocking problem shows up worst in one predictable spot, and it’s worth checking before you call the job done.
The Spot Where Edging Fails First
Corners and curve transitions are where edging loosens before anywhere else. Straight runs get even pressure. Corners take a sideways push every time a mower or trimmer passes, and that push works the anchor loose over a season or two.
If you guessed that the ends of a bed are the weak point, that’s a reasonable guess, but it’s usually wrong. Cut ends anchored into a solid run of edging rarely move. It’s the mid-run curves and 90-degree corners that take the beating.
Add an extra stake or an extra brick’s worth of backfill compaction at every curve and corner, not just at the standard interval. It takes five extra minutes and it’s the difference between edging that holds and edging you’re re-driving stakes into every spring.
With the trouble spots reinforced, it’s worth matching the method to your actual budget and yard before you commit to one.
Choosing Edging for Your Space and Budget
Metal or plastic strip edging is the cheapest and fastest option, good for straight or gently curved beds where you want a clean, low-profile line and don’t need to walk on it. It’s the easiest for a first-timer to install in an afternoon.
Brick, pavers, or natural stone cost more and take longer, but they give you a mowable edge, meaning you can run a mower wheel right along the top and skip trimming entirely. That’s worth a lot if you hate string-trimming bed edges.
Poured concrete curbing is the most permanent and the most expensive, and it’s genuinely a job to hire out unless you’ve worked with concrete before, since a bad pour cracks within a year or two.
For tight budgets, brick or paver edging salvaged or bought secondhand can look just as sharp as new material once it’s set.
Whatever you choose, the honest truth about upkeep is that even good edging needs occasional attention.
What Upkeep Actually Looks Like
Strip edging needs a check every spring: walk the line and re-seat any stakes that frost has pushed up. This is normal, not a sign you did it wrong.
Brick and stone edging needs occasional releveling if a piece sinks or tilts, usually just lifting it, adding a little soil underneath, and resetting it. Concrete curbing needs the least upkeep but the most attention if it ever cracks, since a small crack left alone widens with freeze-thaw cycles.
The honest answer to the follow-up question most people have next, “will I ever have to redo this,” is: probably some of it, some years, at the corners and curves first. That’s normal wear, not a failed install.
Here’s everything worth saving before you head back out to finish the job.
DIY at a Glance
- Trench depth: 4 to 6 inches for strip edging, 6 to 8 inches for brick, pavers, or stone set on edge.
- Stake spacing: every 2 to 4 feet on strip edging, with an extra stake added at every corner and curve.
- Tools needed: flat spade or half-moon edger, narrow trenching shovel, garden hose or rope for layout, hand tamper.
- Material overage: buy about 10 percent more than your measured bed length to cover waste on curves and cuts.
- Backfill method: fill and compact in layers on both sides, never dump and tamp once.
- Weak points to reinforce: corners and curve transitions take the most sideways pressure from mowers and trimmers.
- Spring maintenance: walk the line each year and re-seat any stakes or pieces frost has pushed loose.
Get the depth and the corners right and the rest of the job basically takes care of itself.
Everything else, material choice, curve shape, brick versus metal, is really just style on top of that foundation.
