Why Edges Matter
A crisp lawn edge is the single fastest way to make any garden look well-kept. It works the same way a fresh haircut does — the lawn might be average, the borders might be a bit tired, but clean edges pull everything together.
Conversely, ragged or overgrown edges make even a healthy lawn look neglected. If you're going to maintain one thing about your lawn, make it the edges.
When to Cut Edges on New Turf
If you've recently laid new turf, don't touch the edges for at least 3–4 weeks. The turf needs to root fully before you start cutting into it. Trying to edge unrooted turf will pull it apart and leave you with a mess.
Test by gently lifting a corner at the edge. If there's firm resistance, you're good to go. If it peels up, give it another week. See our guide on walking on new turf for more on establishment timelines.
Tools You'll Need
Half-moon edging iron: The proper tool for the job. It has a flat, semi-circular blade designed specifically for cutting clean lawn edges. A sharp spade works at a push, but the half-moon is more precise and easier to control.
Long-handled edging shears: For ongoing maintenance. These have blades set at 90 degrees to the handles so you can trim the grass that grows over the edge without bending down.
A plank or straight edge: For cutting straight lines. Any long, straight piece of timber works.
A hosepipe or rope: For marking out curves before cutting.
Cutting Straight Edges
For a straight edge along a path, patio, or border:
- Lay a plank along the line you want to cut. Stand on it to hold it steady.
- Push the half-moon edging iron straight down along the plank's edge, cutting 75–100mm deep.
- Work along the full length, overlapping each cut slightly.
- Remove the waste soil and grass from the border side.
The plank gives you a perfectly straight guide and keeps your feet off the turf you're cutting. Move it along as you work.
For edges along a driveway or paving, cut so the lawn edge sits flush with or very slightly above the hard surface — this makes mowing easier and prevents the mower scalping the edge.
Cutting Curved Edges
Curves give a garden a more natural, relaxed feel. The key is making them smooth and intentional rather than wobbly.
- Lay a hosepipe or length of rope on the ground in the shape you want. Adjust until the curve looks right — stand back and view it from a distance before committing.
- Once you're happy, cut along the hosepipe with your half-moon edging iron, again going 75–100mm deep.
- Remove the waste and clean up the cut.
Gentle, sweeping curves look better than tight, fiddly ones. As a rule of thumb, if you can't mow around it comfortably, the curve is too tight.
Installing Permanent Lawn Edging
Cut edges look great immediately but need regular maintenance to stay sharp. Grass naturally creeps outwards into borders, and over time your clean edge will disappear without upkeep.
Permanent lawn edging solves this. There are several options:
Metal edging strip: The best long-term option. Thin steel or aluminium strips (typically 100–150mm deep) that push into the ground along the lawn edge. They're barely visible but create a permanent barrier that grass can't cross. They flex easily for curves and last for years.
Plastic edging strip: Cheaper than metal but does the same job. Some types look a bit flimsy, so go for the heavier gauge options. Avoid the very cheap corrugated plastic — it warps and pops out of the ground.
Brick or stone mowing strips: A row of bricks or pavers set flush with the lawn along the border edge. These look smart and give the mower a solid surface to run along, eliminating the need for shears. More work to install but virtually maintenance-free.
To install strip edging, cut your edge line first, then push or tap the strip into the cut. The top of the strip should sit at soil level or just below the turf surface — you don't want it visible or catching the mower blade.
Maintaining Edges
Ongoing maintenance is what separates a tidy lawn from a scruffy one. The good news is it takes very little effort once the initial cut is done.
After each mow, run your long-handled edging shears along any edges where grass has grown over. This takes a couple of minutes for an average garden and makes an immediate difference.
Once or twice a year, re-cut the edges with your half-moon edging iron to restore a clean, vertical face. Spring and early autumn are good times for this. Over the year, the edge gradually softens as soil moves and grass creeps — a fresh cut brings it back.
Remove edge trimmings. Don't leave the clippings sitting on the border — they look untidy and can root into bare soil, creating grass you'll have to weed out later.
Common Mistakes
Cutting edges before turf is rooted. As mentioned, wait at least 3–4 weeks. Patience here prevents problems.
Cutting too shallow. An edge that's only 25mm deep offers no definition and disappears within weeks. Go to 75–100mm for a proper, lasting edge.
Over-cutting. Each time you re-cut an edge, you remove a thin strip of lawn. Over years, this gradually shrinks your lawn. Permanent edging strips prevent this by maintaining a fixed edge line — another reason to install them.
Wobbly curves. Take the time to lay out curves with a hosepipe first. Once you've cut a wobbly line, it's much harder to fix than to do it right the first time.
The Difference It Makes
If you've recently laid turf anywhere — whether that's a small garden in Brighton, a new-build plot in Birmingham, or a full rear lawn in York — edging is the finishing touch that makes the whole project look complete. It's a small investment of time for a disproportionately large improvement in how your garden looks.