Robot lawn mower buying guide
Find the right robot lawn mower for your garden and take the stress out of maintaining your lawns.
&poi={$this.metadata.pointOfInterest.x},{$this.metadata.pointOfInterest.y},{$this.metadata.pointOfInterest.w},{$this.metadata.pointOfInterest.h}&scaleFit={($this.metadata.pointOfInterest.x>0)?$sfpoi:$sfcenter}&sm=aspect&aspect=2:1&sfcenter=center&sfpoi=poi&qlt=50&fmt=auto&noiser=0&fmt.jpeg.interlaced=true&fmt.jp2.qlt=40&)
By Steven Smith | Date published: June 2026
Robot lawn mowers are designed to take care of regular lawn maintenance with minimal input. They work automatically, trimming small amounts of grass little and often to keep your lawn neat and healthy.
This guide explains how robotic lawn mowers work, the different types available, how to set one up, and what to consider before choosing one.
What is a robot lawn mower?
A robot lawn mower is a battery-powered device that moves around your garden on its own, cutting grass to a set height. It navigates using boundary wires, sensors or GPS, depending on the model.
Unlike traditional mowing, robot mowers cut “little and often” – usually a daily mow taking only a few millimetres off the grass at a time. These fine clippings fall back into the lawn and can help maintain its appearance without needing to collect grass. You’ll still want a grass trimmer to finish the lawn and our range of plant and lawn care will help you give your freshly mown lawn that finishing touch.
How do robot lawn mowers work?
There are a few variations when it comes to robot lawn mowers. The most common type uses a boundary wire installed around the perimeter to define the mowing area. You can even create “islands” so the mower avoids obstacles like flower beds, trees and water features within the lawn using a single run of wire. Some use cameras and sensors to detect obstacles to avoid. Based on the settings input, it will head out on its scheduled mows, and when the battery runs low it returns to its charging station so it’s always ready for the next cut.
More advanced models feature apps to allow you to create boundaries that work together with GPS when navigating your garden.
Types of robot lawn mower
Carousel
Things to consider when choosing a robot lawn mower
When choosing a robotic lawn mower, think about how it will fit your garden and routine.
Lawn size and coverage
Each mower is designed for a specific area size. Always check the recommended coverage to match your lawn.
Cutting height and width
Adjustable cutting heights help maintain different grass lengths. A wider cutting width can speed up mowing.
Battery life and charging
Longer battery life means more mowing per cycle. Most models return to their dock automatically when power is low.
Navigation and sensors
Look for features such as:
- Obstacle detection
- Lift and tilt sensors
- Weather sensors on some models
Slope handling
Check the maximum gradient the mower can manage if your garden has uneven ground.
Why should I get a robot lawn mower?
Robot lawn mowers offer a host of benefits from saved time to less clean up, but there are things to think about before you purchase.
Advantages
- Saves time on regular lawn maintenance
- Quiet operation compared to many traditional mowers
- Regular trimming can help keep lawns looking tidy
- Minimal effort once set up
Things to consider
- Initial setup can take time, especially with boundary wires
- Performance can vary depending on terrain and conditions
- Some come with a weather protective cover, but not all. Make sure you have a shed or storage to protect your weather from the elements if not.
How to set up a robot lawn mower
Setting up a robotic lawn mower usually involves:
- Placing the charging station on a flat, accessible area
- Installing the boundary wire around your lawn edges
- Securing the wire and connecting it to the base station
- Setting the cutting schedule and height
- Running a test cycle to check coverage
Always follow the manufacturer instructions for safe and correct installation.
Using a robot lawn mower day to day
Once installed, robotic mowers speed up your garden maintenance:
- Set a regular mowing schedule for consistent results
- Keep the lawn clear of large debris
- Occasionally check blades and clean the underside
- Store or protect the mower during extreme weather where recommended
- While a robot mower will save you time in looking after your lawn, make sure you have a hose and accessories on hand to help you get your lawn looking its best between cuts.
Robot lawn mower vs traditional mower
Think about the main factors when buying and using a mower to help you consider which feature is most important to you.
| Feature | Robot lawn mower | Traditional mower |
|---|---|---|
Operation | Automatic | Manual |
Effort | Low | Medium to high |
Noise | Generally quieter | Varies by type |
Cutting style | Frequent, light trims | Less frequent, heavier cuts |
Setup | Initial installation required | Minimal set up |
FAQs
What is the lifespan of a robot lawn mower?
The lifespan of a robotic lawn mower depends on usage, maintenance and build quality. With regular care, many models can last several years. Batteries may need replacing over time, and blades typically require more frequent changes. Keeping the mower clean and following manufacturer guidance can help extend its usable life.
Can robot mowers cut wet grass?
Many robot lawn mowers can operate in light rain or damp conditions, but performance may vary depending on the model and grass length. Cutting wet grass can sometimes lead to reduced efficiency or grass clumping. For best results, it is often recommended to mow when the lawn is dry where possible.
Can robot lawn mowers work in the rain?
Some robotic mowers are designed to handle light rain, while others include rain sensors that pause mowing and return the unit to its charging station. Always check the product guidance for weather suitability. Avoid using any electrical equipment in extreme weather conditions.
How long does it take a robot mower to cut 1 acre?
The time required depends on the mower’s capacity, cutting width and planned schedule. Many robotic mowers are designed to work continuously over several sessions rather than completing the lawn in one go. This gradual approach helps maintain consistent grass length rather than cutting everything at once.
What do robot mowers do with grass cuttings?
Robot mowers leave very fine clippings on the lawn as they cut little and often. These clippings settle into the grass and break down naturally over time. This process can help maintain the lawn’s appearance without needing a grass collection box.
Can robot mowers mow at night?
Yes, many robotic mowers can operate at night due to their quiet motors. However, visibility and safety should always be considered, especially in shared outdoor spaces. Some users prefer daytime operation for easier monitoring.
Do you need internet for a robot lawn mower?
Most robotic lawn mowers do not require internet to function, as basic scheduling is built into the device. However, internet access may be needed for app-controlled features such as remote monitoring or updates, depending on the model.
How do robot mowers know where to cut?
Robot mowers follow boundary wires, onboard sensors or mapping systems to stay within defined areas. They move in patterns or random paths, gradually covering the entire lawn over time. Sensors help detect obstacles and adjust direction safely.
Can robot lawn mowers go uphill?
Many robotic lawn mowers are designed to handle slopes, but each model has a maximum gradient it can manage. It is important to check this specification before choosing a mower, especially if your garden has uneven terrain.
What is the disadvantage of a robotic lawn mower?
Robot lawn mowers can take time to install, particularly if a boundary wire is required. They may also be less suited to very complex or uneven gardens where navigation is more difficult. While they reduce day-to-day effort, they still need occasional maintenance such as blade checks and cleaning. For some users, the initial cost and setup can be higher compared to traditional mowers.
