Greenworks 21142 review

The Greenworks 21142 Corded String Trimmer is a powerful and durable electric weed eater with a good range of features.

Greenworks 21142 review
(Image: © Walmart)

Top Ten Reviews Verdict

The Greenworks 21142 Corded String Trimmer is an efficient and reliable electric weed eater that offers great value for money thanks to its low price and good range of features.


  • +

    10-amp motor

  • +

    18-Inch swath

  • +

    Quick-connect coupler


  • -

    Shaft doesn’t extend

  • -


Why you can trust Top Ten Reviews Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.

The Greenworks 21142 Corded String Trimmer is a dual-string trimmer with a powerful 10-amp motor, so it can make short work of both weeds and overgrown lawns. It’s one of the cheaper options in our round up of the best electric weed eaters, so it offers great value for money too.

It may be a little unwieldy for some, as it is heavier and less adjustable than models like the Worx WG163, and the lack of edging features is a bit of a disappointment. But, for powerful cutting at an affordable price point, the Greenworks 21142 is hard to beat. 

Greenworks 21142 Corded String Trimmer: Pricing and value 

The Greenworks Corded String Trimmer is an affordable weed eater, priced at just under $70. It’s a bit more expensive than budget models like the Sun Joe TRJ13STE, but it offers an impressively powerful motor and a large cutting swath, which allows the Greenworks 21142 to quickly cut lawns down to size.

It is a corded electric weed eater, which can be a downside for some, especially those with large yards, but battery models tend to be more expensive. They’re also often less powerful, so you would need to spend quite a bit of money to find a battery-powered weed eater that can measure up to the Greenworks Corded String Trimmer.

Greenworks 21142 Corded String Trimmer: Features

Corded trimmers tend to have a good power output and the Greenworks 21142 is no exception thanks to its 10-amp motor. It’s also fitted with plenty of features designed to help you get the job done quickly. It has a long shaft as well as an 18-inch cutting swatch and a dual-line head, making it great for covering yards with plenty of wide open space. For yards with tight and difficult to reach areas, you might want to check out the Black and Decker LST300 instead as the Greenworks Weed Eater would struggle.

While the Greenworks 21142 Corded String Trimmer is solidly built, it is also on the heavier side, weighing in at just under 10lbs. As most of the electric weed eaters on our roundup are closer to the 5lb mark, this is one of the heaviest models we looked at. It also doesn’t have an adjustable head so it can’t handle edging like the Worx WG163 and RYOBI Electric Weed Eater can.

The Greenworks Corded String Trimmer is pitched to be a green alternative to gas trimmers, which is why it’s heavier and more durable than most electric weed eaters and packs more power. It is still lighter than a gas trimmer and easier to use, but it can also handle thick overgrowth and weeds better than its lighter electric counterparts.

As a corded electric weed eater it doesn’t quite have the maneuverability or range of battery-powered models, but you don’t have to worry about charging batteries either. Battery-powered weed eaters that can trim for long periods of time, like the RYOBI Electric Weed Eater, tend to be much more expensive than their corded counterparts so if you are ok with corded, the Greenworks Electric Weed Eater is great value. 

Greenworks 21142 review

(Image credit: Walmart)

Greenworks 21142 Corded String Trimmer: User reviews 

Users tend to rate the Greenworks Corded String Trimmer at an average of 4.2 out of five at Walmart, so it’s a popular choice. Users that have switched over from gas trimmers were particularly impressed that this electric model measured-up power-wise, while also being much quieter than gas-powered weed eaters. A few reviews noted that they were able to clear their yard in half the time it took with other electric weed eaters.

Positive reviews noted that it powered through overgrown lawns and was solidly made. Even though it’s heavier than comparable electric models and the shaft isn’t adjustable, most users didn’t find the Greenworks Corded String Trimmer difficult to use. A few users did find it too heavy for them though.

Overall, the Greenworks Corded String Trimmer is really popular with users, especially those looking for a green alternative to gas weed eaters.

Should you buy the Greenworks 21142 Corded String Trimmer? 

For users wondering if there’s an electric alternative that can still offer the power that gas-powered weed eaters provide, then the Greenworks Corded String Trimmer is a great option. The cord might be a hassle for some, but you’ll struggle to find a battery-powered trimmer that can come close to the power of the Greenworks Corded String Trimmer’s motor.  

Stevie Keen

Stevie is a freelance digital consultant, copywriter and photographer. She's worked for brands like the Radio Times and Wallpaper*, and has also written for Amateur Photographer, Clash Magazine and Flash Pack, amongst others. Stevie's bylines cover all things related to the home - from air conditioning units to refrigerators to gas grills (and everything in between).