How to Install Steel Edging for Landscape | Straight Borders That Stay

Installing steel landscape edging requires marking the layout, digging a shallow trench, setting the edging to height with stakes on the inside, and backfilling with compacted soil or gravel to keep the border stable and straight.

Steel edging gives a lawn or garden bed a clean, permanent line that plastic and concrete alternatives can’t match. But a wavy, popped-up border defeats the whole point. The difference between an edging project that looks professional and one that looks like a weekend mistake comes down to five steps done in the right order — with a handful of avoidable errors that cause most failures.

What You Need Before You Dig

Measure the full perimeter of the bed before ordering or cutting any material. Mark the line with stakes and string for straight runs, or lay a garden hose for curved sections. A spray-paint or chalk line works for both. Clear grass, weeds, roots, and debris along the full path — leftover turf under the edging creates soft spots that let the steel shift later.

Choose your edging type: some systems use pre-drilled holes and separate stakes, while others integrate spikes or teeth that drive directly into the ground. Your product may differ, so follow its exact depth and connector requirements.

Digging the Trench the Right Depth

Dig a trench roughly 4 to 6 inches wide along the marked line. Depth varies by product, but a common target is about half an inch shallower than the edging’s total height — this lets the top sit flush with or slightly above the finished soil grade. Curves need narrower trenches so the steel bends gradually without kinking.

Sand at the bottom helps level and drain, but some systems work better with gravel or plain soil backfill. Check your manufacturer’s guidance; using the wrong base can cause the edging to settle unevenly over time.

Setting the Edging and Driving Stakes Correctly

Place the first section in the trench with stake pockets, teeth, or fixing hardware facing the inside of the bed — away from the lawn view. This keeps the visible face clean. The EdgeRight guide recommends starting at the most visible corner and working outward. Press the edging into the trench by hand, then drive it down using a mallet or hammer with a wood block or 2×4 protector over the steel spine. Hitting bare steel dents the finish and weakens the material.

Work back and forth along the edging rather than hammering one end all the way down; driving one end only lifts the opposite end out of the ground. Insert stakes every 18 to 24 inches — or every 2 to 3 feet for lighter-duty installations — with extra stakes at every joint and corner. Stake tops should sit flush with or slightly below the edging’s top edge.

Connect sections end-to-end using the product’s supplied connector. The Corten system uses a steel buckle that locks without tools; EdgeRight uses a clamp that fits between notches. Align the pieces perfectly before locking them — a misaligned joint creates a visible gap and weak structural point.

Backfilling and Finishing for Long-Term Stability

Once every section is set, staked, and level, backfill the trench with soil or gravel and compact it firmly. Leave the top edge exposed to its target height. Compact in layers — dumping loose soil all at once leaves voids that settle later, and settling shifts the edging out of alignment. Check straightness along the full run after backfilling; a small adjustment now is much easier than re-digging in a year.

For curved installations, shape the steel in small increments by hand or with pliers, securing stakes as the curve develops. Cutting is best done with metal snips or a hacksaw; smooth any cut edges to avoid injury when working near the border later.

Beyond the install method, the quality of the finish depends on the product you choose. If you’re shopping for materials, our tested roundup of top-rated steel landscape edging options covers the systems that hold up best in real use.