Steel-Blade Edging vs String-Trimmer Edging: What’s the Difference?

Steel-blade edging cuts a clean vertical line between your lawn and the pavement — a string trimmer turned on its side shaves the grass back at an angle. Both look tidy on day one. The difference is what the edge looks like a couple of weeks later, and what happens to it over a season.

What a string trimmer does to an edge

Flip a string trimmer vertical and it becomes an edger of sorts: the spinning nylon line tears the grass back from the pavement line. It’s fast, and done carefully it looks respectable. But nylon line tears rather than cuts — it shreds the grass blades and leaves a bevelled slope instead of a wall.

That bevel is the problem. The grass at the edge keeps its roots, so it grows straight back over the concrete within days, and each pass pushes the ragged line a little further into the lawn. Trimmed edges need constant re-doing precisely because they never actually separate the turf from the pavement.

What a steel blade does differently

Run a steel blade down the border and it severs the turf cleanly, roots and all, opening a narrow trench of bare soil where grass meets concrete. With nothing rooted at the lip, there’s nothing left to lean back over the pavement — the border keeps its shape from one visit to the next instead of blurring within days.

That’s also where the shadow line comes from — the thin, dark groove that makes a property read as finished from the street without you quite knowing why. It isn’t a trick of paint or fertilizer; it’s simply a true vertical face catching the light differently than a shaved slope ever can.

So which one do you actually need?

Honest answer: if you just want the grass off the sidewalk, a carefully handled string trimmer does the job. If you care how the property presents — selling, hosting, or simple pride in the place — the blade is the difference you can see from the street.

The trade-off is time. Blade edging is slower, physical work, which is why it’s often skipped or sold as an add-on. Rob includes it on every visit instead of treating it as an upsell — it’s the signature of how he cuts.

How Rob edges every lawn

Every Robbs property gets steel-blade edging as part of the regular visit — driveway edges, walkways, and curb lines — followed by trimming around fences and posts, then the cut. The full spec is on the steel-blade edging service page below.

If you’re in the Niagara region and want the edge without doing the edging, quotes are free and usually same-day.

• Steel-Blade Edging — full service spec
• Weekly Lawn Cutting
• All lawn care advice