How often should you re-cut your lawn and bed edges?
Grumpty's answer
Every 6 months
Why bother
Grass creeps the border and mulch spills the gap. A thorough-tier job. Skippable when life's busy, worth it when it isn't.
Why it's a range
Fast-spreading grasses want it twice a year. Slow cool-season lawns once.
What the job involves
- Wait for the soil to be moist but not muddy, after rain or a watering. Then mark or just eyeball the line where the turf meets the bed or path.
- Cut a clean vertical line along that edge with a half-moon edger, a spade, or a powered edger, slicing straight down to sever the grass roots.
- Make a second cut at an angle, facing away from the bed, so the strip of turf lifts free. Pull the severed turf and roots out.
- Slope mulch down into the new 2-3 inch trench for a crisp bed edge. On lawn-and-path borders, run a string trimmer or blade edger along the line every mow to keep it.
Do it yourself, or pay someone?
Yourself, in most yards. A manual half-moon edger is $25-$58, a powered blade edger $30-$300. A pro will fold edging into a mowing visit at roughly $48-$207, or charge $2.50-$11 a linear foot on its own. Worth hiring out only for a big yard or a clean reset on borders that have got away from you.
What skipping it costs
$50-$150 per cleanup visit is what a pro charges to hand-pull invading grass and weeds out of beds on a roughly quarter-acre yard once the edge has gone. That's not a one-off. Let the borders go soft and the lawn keeps creeping into the beds, so the figure comes round again every time they need rescuing. None of it is structural, it's just a nuisance that bills you on repeat. Re-cutting the line yourself costs a wet afternoon and a spade.
Signs it's overdue
- Grass blades or runners have crept over the bed line and are mixing in with the plants, or spilling onto the path and the driveway.
- The border between lawn and bed has gone soft and fuzzy instead of a crisp line, and the mulch is blurring into the turf.
- Weeds and grass are clearly elbowing the bedded plants for room, and the old edge now needs a spade to find again, not a trimmer.
When to start thinking about it
A few days' warning does it. Grumpty grumbles 5 days out, then leaves you alone. Mark it done and Grumpty sets the next one, every 6 months, so you can go back to forgetting it exists.
Questions people ask
How often do I actually need to do this?
Roughly every time you mow through the growing season for lawn and path borders. Weekly for fast grasses like Bermuda or Zoysia, every week or two for St. Augustine, every two to four weeks for slow ones like fescue or Kentucky bluegrass. The deep trench-edging of garden beds is heavier going, so two or three times a season does it: early spring, midsummer, and a fall pass in warm climates.
Is a manual edger fine, or do I need a powered one?
A manual half-moon edger ($25-$58) cuts a clean bed edge and suits most home yards. It's just slower. A powered blade edger ($30-$300) earns its keep on long lawn-and-sidewalk runs. A string trimmer edges too, but held too low it scalps the grass and stresses the turf, so a dedicated blade gives a cleaner, kinder line.
What's the best time to edge?
When the soil is moist but not muddy, usually after rain or a watering, so the blade slices clean instead of tearing. For the deep bed work, early spring before growth takes off is the sweet spot, with a midsummer touch-up. Edging dry, baked ground is just a fight you'll lose.
Related jobs
Stop keeping this one in your head
This is one job. Your home has dozens more, each on its own clock. Grumpty is a free home-maintenance app: add a job once, it tracks the date, grumbles when it's due, and rolls it forward the moment you mark it done.
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