How to Edge a Lawn

🧰 Tools & Materials

Tools

• Lawn edger, string trimmer with an edging function, or manual half-moon edger
• Garden rake
• Broom or leaf blower
• Garden hose or marking paint for establishing a new edge
• Safety glasses
• Work gloves
• Closed-toe shoes

Materials

For most lawns, no additional materials are needed. You are simply cutting a clean boundary between the grass and the surrounding surface or landscape bed.

Signs Your Lawn Needs Edging

Edging is mostly about keeping grass where it belongs. It may be time to edge when:

• Grass is growing over the sidewalk or driveway
• The boundary between the lawn and mulch beds is disappearing
• Your lawn looks freshly mowed but still unfinished
• Grass runners are spreading into flower beds
• Existing edges have become uneven or overgrown

A clean edge can make an otherwise ordinary mowing job look noticeably sharper.

Before You Start

Decide exactly where you want the edge before you begin.

If you’re following an existing sidewalk, driveway, or curb, the edge is already established.

For landscape beds, use a garden hose to lay out curves before cutting. Step back and look at the shape from several angles before committing to it.

If you’re using a powered edger, inspect the area for sprinkler heads, landscape lighting wires, shallow irrigation tubing, and other hidden obstacles.

💡 Pro Tip: Edge the lawn before mowing. The mower can pick up many of the grass clippings and loose debris created while edging.

How to Edge a Lawn

Step 1: Find the Existing Edge

Start by locating where the grass should actually end.

Along a sidewalk or driveway, grass may have grown several inches over the concrete, making the original edge difficult to see.

Use your foot or a hand tool to pull back some of the overgrown grass until you can see the edge of the pavement.

For landscape beds, establish the line you want before cutting.

What You Should See: A clear path showing where the lawn should end.

If Yours Looks Different: If the grass has completely covered the edge of the sidewalk, uncover a small section first and use that as your reference as you work.

Step 2: Position the Edger

Place the edger so the blade runs right along the boundary between the lawn and the adjoining surface.

For a sidewalk or driveway, keep the blade just beside the concrete rather than cutting deeply into the lawn.

If you’re using a string trimmer, rotate the trimmer into its edging position and keep the string nearly vertical.

With a manual edger, position the blade on your desired line and push it into the soil using your foot.

What You Should See: The blade or trimmer line should follow the edge without removing a wide strip of healthy grass.

💡 Pro Tip: Don’t try to create an extremely deep trench. A clean, narrow separation is usually all you need.

Step 3: Work Slowly Along the Edge

Move forward gradually while keeping the edger aligned with your boundary.

Avoid rushing. Small movements make it much easier to keep the line straight.

For heavily overgrown edges, you may need to make a first pass to expose the boundary and a second pass to clean it up.

On curves, shorten your movements and follow the shape gradually instead of trying to create the entire curve at once.

What You Should See: A narrow, defined line separating the grass from the sidewalk, driveway, or landscape bed.

If Yours Looks Different: If the edge starts wandering into the lawn, stop and reposition the edger. Don’t continue following the mistake farther down the yard.

Step 4: Remove the Cut Grass and Soil

Once the edge has been cut, rake or pull away the strips of grass, roots, and loose soil.

Overgrown sidewalk edges can sometimes produce surprisingly large strips of turf.

Sweep or blow debris off sidewalks and driveways so you can inspect your work.

What You Should See: The full edge of the pavement should now be visible with grass stopping cleanly beside it.

💡 Pro Tip: Large pieces of healthy turf removed from an overgrown edge can sometimes be used to fill small bare spots elsewhere in the lawn.

Step 5: Touch Up Uneven Areas

Walk back along the entire edge and look for sections that stick out.

Use the edger or a hand tool to correct small bumps rather than making another aggressive pass over the whole area.

Pay particular attention to corners, curves, and places where the lawn meets a driveway.

What You Should See: A consistent edge that follows the shape of the sidewalk, driveway, or landscape bed.

If Yours Looks Different: Don’t keep widening the edge trying to make it perfect. Small irregularities are usually much less noticeable once the lawn is mowed.

Step 6: Mow and Clean Up

Mow the lawn after edging to bring everything to a consistent height.

Then sweep or blow remaining grass and soil off hard surfaces.

Take one final look from farther away. The edge should appear clean and intentional without a large trench between the lawn and pavement.

For established lawns, maintaining the edge regularly is much easier than allowing grass to grow several inches over it again.

🛑 Common Mistakes to Avoid

Cutting Too Far Into the Lawn

Stay close to the existing boundary. Cutting several inches into healthy grass unnecessarily reduces the lawn area and can leave an obvious gap.

Making the Edge Too Deep

You don’t need a deep trench beside sidewalks and driveways. You’re mainly cutting through grass and roots that are crossing the boundary.

Moving Too Fast

Rushing is one of the easiest ways to create a crooked edge. Slow down, especially around curves.

Ignoring Hidden Obstacles

Sprinkler heads, irrigation tubing, landscape lighting, and buried cables can be damaged by an edger. Locate anything near the edge before starting.

Trying to Fix a Crooked Line by Cutting More

This often turns a small mistake into a much larger one. Stop, reassess the original boundary, and make only the correction that’s necessary.

❓ FAQs

How often should you edge your lawn?

During the growing season, many lawns benefit from edging every 2–4 weeks. Fast-growing grass may need it more frequently, while slower-growing lawns may need it only occasionally.

Should you edge before or after mowing?

Edging before mowing usually works best. The mower can clean up some of the clippings afterward, and you’ll get a more finished appearance.

Can I edge a lawn with a string trimmer?

Yes. Many string trimmers can be rotated vertically and used for edging. A dedicated lawn edger usually creates a straighter, more consistent line, but a trimmer works well for routine maintenance.

How deep should I edge along a sidewalk?

Only deep enough to cut through the grass and roots crossing onto the pavement. There’s usually no reason to create a deep trench.

How do I create a new edge around a flower bed?

Lay out the shape with a garden hose first. Once you’re happy with the curve, cut along the hose line with a manual or powered edger, then remove the grass on the bed side.

Why does my lawn edge keep getting wider?

Repeatedly cutting slightly farther into the lawn can slowly move the boundary inward. Use the sidewalk, driveway, curb, or established bed line as your reference every time you edge.

📞 When to Call a Professional

Lawn edging is usually an easy DIY project, but professional landscaping help may make sense if:

• Large sections of the lawn need completely new landscape borders
• Tree roots make the area difficult or unsafe to edge
• Irrigation lines or sprinkler heads are located directly along the proposed edge
• Significant grading or landscape-bed reconstruction is needed

For normal sidewalks, driveways, curbs, and garden beds, most homeowners can handle routine edging themselves.

🔗 Related DIY Guides

• How to Mow a Lawn Properly
• How to Fix Bare Spots in a Lawn
• How to Level an Uneven Lawn
• How to Get Rid of Weeds in Your Lawn
• How to Overseed a Lawn