How to Lay a Brick Landscape Border | Set It Once, Straight For Years

Laying a brick landscape border takes a weekend and basic tools, and a compacted base is what keeps it straight season after season.

If you’ve been fighting grass that creeps into flower beds, or you want a clean line between lawn and mulch, a brick border is one of the most satisfying fixes in landscaping. The work itself isn’t complicated — mark the line, dig a shallow trench, compact the base, set the bricks, and lock them in with sand. But the difference between a border that stays put and one that waves and shifts comes down to two things: how well you compact the base and how often you check level as you go.

What You Need Before You Start

Gather everything first so you’re not stopping mid-project. For a standard dry-set border you’ll need bricks or pavers, paver base or crushed stone, sand, landscape fabric (optional, but it stops weeds), a rubber mallet, a hand tamper, a shovel, a level, stakes, and string for straight runs or a garden hose for curves.

One decision shapes everything else: dry-set versus mortar. Dry-set in sand or gravel stays flexible and is easier to repair. Setting the bricks in mortar or concrete makes the border more permanent — that’s the route to take if you never want to touch it again, but it’s also harder to dig up later. This Old House’s guide walks through the dry-set method, which suits most homeowners and is the approach below.

How To Lay The Border Step By Step

The whole job comes down to five steps, and skipping the middle ones is what makes borders fail.

1. Mark The Layout And Calculate How Many Bricks

Lay out the line with stakes and string for straight runs, or a rope and hose for curves. This Old House recommends measuring the rope length, dividing by the brick width, then adding 10% for waste and mistakes. That extra cushion matters more than you think — cutting bricks for curves and dealing with the occasional split eats into your count fast.

2. Dig The Trench

Excavate along your marked line to a depth of about 3 to 4 inches for a simple flush border, or 4 to 6 inches for a more substantial one that sits above the lawn line. The bottom needs to be as flat as you can make it. An uneven trench bottom is the leading cause of wavy edging — if the base isn’t level, no amount of tapping will fix it.

3. Build And Compact The Base

Fill the trench with paver base or crushed stone and compact it thoroughly with a hand tamper. This is the step most DIYers rush, and it’s exactly the one that prevents the shirting and settling that ruin borders later. A flat, compacted base is the entire secret to edging that stays straight. If you’re using landscape fabric, Home Depot’s guide lays it down here, before the base material, so it blocks weeds without being disturbed by later work.

4. Set The Bricks And Check Level Constantly

Place the bricks one at a time and tap each into place with a rubber mallet. Do not use a regular hammer — it cracks brick, and you’ll spend your afternoon redoing your own work. Check both horizontal and vertical level frequently as you lay each section, and check your alignment against the string line as well. This Old House says to keep checking alignment often while laying stretches; a few inches of drift is much easier to correct than several feet of it.

5. Lock Them In With Sand And Backfill

Brush sand into the gaps between bricks to lock them together, then tamp once more to seat everything. Some sources recommend a light watering to settle the fill — if you use polymeric or jointing sand, follow the manufacturer’s wetting instructions exactly, because that product sets differently than plain sand. Finally, backfill soil or mulch along the outside edge to stabilize the border once the bricks are set.

Curves, Common Mistakes, And What To Avoid

Curves are where inexperience shows. Tight radii may require cutting bricks or leaving triangular gaps to keep spacing consistent — This Old House notes that fitting adjustments are simply part of the process for curved borders. Don’t try to force full bricks around a tight bend; it creates ugly, uneven gaps.

The four mistakes that ruin borders are the same ones every source calls out:

• An uneven trench bottom, which creates wavy edging you’ll notice from across the yard.
• Skipping compaction, which leads to shifting bricks and settling within a season.
• Using a regular hammer instead of a rubber mallet, which cracks the bricks.
• Not checking level and alignment frequently, which produces crooked runs and uneven curves.

For the actual bricks themselves, a border needs a brick rated for ground contact that can handle freeze-thaw cycles — not the soft common brick used for house veneer. If you’re choosing between paver, solid brick, or specialty edging bricks, our roundup of the best border bricks for landscaping covers the top picks for driveway-adjacent borders and garden beds alike.

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