Which Robot Mower Has the Best Edge Cut? 2026 Guide

7 min read by Tyler Novak Updated November 11, 2026

Which robot mower has the best edge cut? No single model wins, because the stated figures come from different designs and tests. Robomow says a standard center-blade mower leaves a strip of about 10 to 20 cm uncut near walls and borders. Mowers with an offset blade or a dedicated edge disc reach closer, so the useful comparison is the figure for the exact model you plan to buy.

The short answer

Center-blade mowers: leave roughly 10 to 20 cm uncut near borders, according to Robomow.
Edge-cut designs: Husqvarna’s EdgeCut uses a rear disc fixed at 45 mm (1.77 in).
Brand figures differ: Robomow lists about 5 to 6 cm, while Ecovacs lists 1.97 in on unpassable borders.
Still needed: a trimmer or shears for the last strip, Robomow advises.

How a center blade leaves an uncut strip

A standard robot mower’s blade sits in the middle of its deck, so it cannot reach grass right against a wall, fence or flower bed. Robomow’s edge cutting explainer puts the uncut strip at about 10 to 20 cm when a mower has no edge-cut function. Ecovacs describes the same limit, noting that a center-located blade restricts how close a mower can cut to an edge.

Robomow also recommends leaving a margin of about 6 cm to the outermost edges. Our reading is that this strip is a limit of the deck layout rather than a fault in the mower. The grass closest to a tall vertical object is the grass a center-blade mower reaches last, so the strip never disappears completely. Our guide on whether robot mowers trim edges covers the basics.

Grey robotic mower at the edge of a lawn where grass meets a flagstone path — The strip of grass at the border is where a center-blade mower has the most difficulty.

How a dedicated edge-cut disc works

Husqvarna’s EdgeCut adds a dedicated disc at the rear of the mower, with a fixed position of 45 mm (1.77 in) for the cut. According to Husqvarna’s EdgeCut support article, the feature activates when the mower reaches a physical or virtual boundary, then sweeps along it. The disc does not reach beyond its fixed position, so the figure sets the practical limit.

Not every boundary triggers the feature. Husqvarna says stay-out zones drawn with AIM mapping do not activate EdgeCut, while stay-out zones made with EPOS wire-free technology count as virtual boundaries and do. Husqvarna lists these compatible models:

305E NERA and 310E NERA
405XE NERA and 410XE NERA
405VE NERA and 410VE NERA

The feature can be turned off in the app if you do not need it. Husqvarna also advises cleaning the disc guard regularly, with extra attention in spring, when grass grows fast, and in fall, when wet leaves build up. The same guidance says not to use a pressure washer on it.

Which robot mower has the best edge cut? Brand figures compared

If you ask which robot mower has the best edge cut, the stated edge figures run from about 5 to 6 cm at Robomow to 1.97 in on the Ecovacs GOAT A2500 RTK, and they measure different things. Robomow’s page gives about 5 cm in one section and about 6 cm in another, so treat that number as approximate. Ecovacs describes its 1.97 in figure as a blade-to-edge distance on unpassable borders, which is a brand claim rather than an independent measurement.

Design or model	Stated edge figure	Type of figure	Source
Standard center-blade deck	Uncut strip of about 10 to 20 cm	Brand description	Robomow
Robomow edge-cut models	About 5 to 6 cm, inconsistent within the page	Brand figure	Robomow
Husqvarna EdgeCut	45 mm (1.77 in) fixed disc position	Product spec	Husqvarna
Ecovacs GOAT A2500 RTK	1.97 in blade-to-edge on unpassable borders	Brand claim	Ecovacs

According to Ecovacs’s edge cutting guide, offset blades can cut nearer to edges than center-located blades. That fits the general design logic, but it is still a manufacturer statement. Our reading is that a disc position, a blade distance and a safety gap are different measurements, so a lower number does not automatically mean a cleaner cut.

Video: Mammotion: Which Robotic Lawn Mower Cuts Closest to the Edges? Comparison + Test — Watch: Mammotion: Which Robotic Lawn Mower Cuts Closest to the Edges? Comparison + Test (Mr Tutorial, YouTube). This video is independent of this guide, so check current specs and prices before you buy.

How borders and boundary setup change the result

When you ask which robot mower has the best edge cut, border type and wire placement matter as much as the model, because they decide how close the mower gets, even with an edge disc. Robomow says stone borders at ground level need about 10 cm, and a stone that butts against a wall should be 20 cm or more. Its edge-cut models leave a blade distance of about 6 cm from the housing, while other models can leave up to 20 cm.

Robomow also warns that a boundary wire laid directly at the edge can cause overshoot of as much as 30 cm. Setting the wire a little back from the border is a reasonable first step, but check the mower’s own installation guide for the exact spacing. Our guide to how to install a robot mower boundary wire walks through the layout.

Mowing pattern also matters for the border. Husqvarna’s NZ support article for the same feature advises alternating mowing directions for the best edge results. It adds that the mower and disc alternate rotation to guide grass into the disc, and that checkerboard or triangle patterns cover edges from more angles, while parallel patterns can leave edges uncut. See our notes on robot mower mowing patterns for the options.

Grey robotic mower on a lawn beside a tree trunk, with a dry bare patch of soil at the base of the trunk — Obstacles such as tree trunks leave grass the mower cannot reach close in.

What to check before you buy

To decide which robot mower has the best edge cut for your lawn, check the stated edge figure in the manual of the exact model, the disc design, the boundary type and whether you still need a trimmer. These four points tell you more than a single headline number, and how to read a robot mower spec sheet explains the other fields.

Find the edge figure in the manual. Use the number for the model you plan to buy, not one from a different product line.
Check the disc design. A fixed edge disc and an offset blade reach the border in different ways, so compare the design as well as the figure.
Check boundary compatibility. For EdgeCut, AIM stay-out zones do not trigger the feature, while EPOS virtual boundaries do.
Plan for hand trimming. Robomow recommends a trimmer or shears for the strip the mower leaves, with mechanical shears suited to small areas.

We recommend choosing the model whose stated edge distance, disc design and boundary type fit your borders, then confirming the figure in its manual before you buy.

Frequently asked questions

Is there one robot mower with the best edge cut?

No. There is no single answer to which robot mower has the best edge cut, because the stated figures come from different brands and tests and do not rank cleanly. A dedicated edge disc such as Husqvarna’s EdgeCut and an offset blade both reach closer to borders than a center blade, but the best fit depends on your borders and boundary setup.

Does edge cutting remove the need for a trimmer?

Not fully. Robomow recommends manual retouching with a trimmer or shears for the strip that remains. Edge-cut models narrow that strip, but tight spots near walls and borders can still need hand work.

Does a stay-out zone trigger Husqvarna EdgeCut?

It depends on how the zone was made. Husqvarna says stay-out zones drawn with AIM mapping do not activate EdgeCut, while EPOS virtual boundaries do. Check the boundary type in the app before you rely on the feature.

Can EdgeCut be turned off?

Yes. Husqvarna says EdgeCut can be turned off in the app if you do not need it. The disc guard still needs regular cleaning, and Husqvarna advises against using a pressure washer on it.