Greenworks 20-Inch Review – 12 Amp Corded Electric Lawn Mower 25022

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Greenworks 20-Inch 25022 Review
Greenworks 20-Inch (25022)
Performance/Cut Quality
What I Like
Large 20 Inch deck/blade.
Steel deck.
Powerful 12 amp motor.
10 inch rear wheels.
Mulching feature.
What I Don't Like
Little heavy.
Not self-propelled.
My Overall Rating

Greenworks 20-Inch 25022 Review


The Greenworks (25022) corded lawn mower has a 20 inch steel deck and is suitable for small to medium-sized lawns. The mower has a 12 amp electric motor and has the ability to collect, mulch and side discharge the cuttings. There are 7 cutting heights on this Greenworks 20 inch from 1 1/2 inch to 3 3/4 inch and it includes safety features to prevent accidental starting. This mower has larger 10 inch rear wheels for improved stability and a huge 56 lbs. grass collection bag.

This is Greenwork’s 20 inch corded lawn mower with a large blade and a more powerful motor than the its smaller brother (14”). The machine sits on a steel deck and has a good range of cutting heights to choose from. There are few extras on this larger model that make it more suitable for larger lawns and more user-friendly than the smaller models.

Key Features

  • Rating: 9.6/10
  • Lawn Size: Small — Medium
  • Power: 12-Amp Motor
  • Deck Size: 20 Inch
  • Number of Cutting Heights: 7 (1 1/2 inch to 3 3/4 inch)
  • Weight: 56 Pounds

Deck Size

Greenwork’s robust 20 inch steel deck supplies good protection from flying debris and the blade. The steel deck does add a decent amount of weight to the machine. You would need to be strong to lift this machine up on to a shelf, or even to hang it on a wall so more than likely best to store lower down in garage.

Greenworks 20-Inch 25022 Deck Size


The Greenworks 20-Inch 25022 uses a powerful 12-amp electric motor. This is a large motor, it needs to be to spin the longer blade. And the power helps the mower to get through think grass, as long as the blade is kept sharp and free from debris. When it comes to mowing through an overgrown lawn or thick weeds, this machine is quite capable when combined with the wide range of cutting heights.

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A long 20 inch blade will cover 8.65 square feet with each pass, meaning that you need to retrace your steps less. Blades are heat treated to be harder and sharper at the blade-edge while still keeping some flexibility to cope with the odd solid object.

The blades are consumables, however you can try to sharpen them when the blade edge becomes dull. These blades are not expensive to replace, and they are easy to find.

Height Adjustment

There is a single height lever on the left-rear wheel, which controls all four wheels. This lever is metal, as is the connecting rod that adjusts the height of the front wheels. 7-positions of height give the operator great control over uneven areas of a lawn or where there may be flagstones.

The lowest height setting is 1 1/2 inches and can go up to a tall 3 3/3 inches, to suit all grass types. Having to use the lever from the back of the machine is a much safer way of controlling the deck height.

Roller (Stripes)

This model does not have a roller, but there is a weighted bar that drags the grass to make it a little more uniform.

Grass Box

The Greenworks 20-Inch 25022 mower comes with a 10-gallon removable grass-catching bag. This bag needs a supporting steel frame, which helps to keep the shape of the mesh bag. If you do not want to collect the grass, the box is removable.

The deck has a built-in side-discharge flap, and the unit comes with a removable chute. Once the side-chute is in, the mower will shoot clippings out to the side of the mower as you are walking.

Greenworks 20-Inch 25022 Grass Box


This is a 3-1 mower, and in addition to being able to collect grass or send it to the side, it will also mulch. A mulching plug comes included with the unit and will chop the clippings further and disperse them under the mower while you travel.

To learn more about the benefits of mulch the lawn, please my article “The Benefits of Mulching Lawn Mowers”

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Safety Features

To start the electric motor, there is a small button on the power junction that needs pressing. This button releases the lock on the throttle bar so that there cannot be an accidental start. The safety button re-engages on releasing the throttle bar.

The power cable to the motor is double insulated, so it has more protection from abrasion or accidental cutting. There is also a circuit-breaker on the mower, and a cord retainer to keep the extension cord up and out of the way.

Design and Build Quality

Greenworks 20-Inch 25022 is well-built and a durable steel deck that will stand a lot more punishment than a plastic deck. The motor is of Greenworks standards, though some owners have noted issues with overheating. Just ensure you are not setting the mower on a too low height setting on thick long or wet grass and you should not have any of these issues.

Greenworks 20-Inch 25022 Video

To get an idea of how this Greenworks mower looks, take a look at the video below.


Greenworks 20-Inch 25022 Performance

The 12-amp motor is perfectly adequate for all seasons and lawn conditions, and the larger deck helps to get through thick grass faster. The machine is heavier due to the steel deck and larger motor, which will make pushing the mower up a hill a little harder, however it is still lighter than a gas powered mower.

The larger rear wheels are a great feature and add to the stability and make the mower more maneuverable.

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Greenworks 20-Inch 25022 Operators Manual

Click here to access the Greenworks 20-Inch 25022 Operators Manual

Pros and Cons

  • Large 20 Inch deck/blade.
  • Steel deck.
  • Powerful 12 amp motor.
  • 10 inch rear wheels.
  • Mulching feature.
  • Rear deck height lever.
  • Wide throttle bar.
  • Side-discharge flap.
  • Little heavy.
  • Not self-propelled.


Should You Buy This Model?

Greenworks 20-Inch 25022 Conclusion

The 25022 is an excellent choice for a small to medium sized lawn. It is quiet and has enough power and cutting heights to cope with most grass types. It has fantastic 3-in-1 cutting options of grass disposal making this mower a flexible and adaptable to your needs.

Greenworks continue to provide high quality and innovative garden tools at very competitive prices to the US market.

The Greenworks 20-Inch 12 Amp Corded Electric Lawn Mower 25022 is ideal for those that:

  • People with a small to medium sized yard (4,500 square feet or less).
  • Those that require a 20” cutting width.
  • People looking for a mower with larger rear wheels for stability.
  • Those looking for a quieter option to a gas mower.
  • People that like the option to mulch the grass cuttings.
  • People that like the option to side discharge the grass cuttings.
  • Those that require a powerful 12 amp motor for longer/thicker lawns.
  • Requires very little work to assemble the mower.
  • Those looking for great value for money.
  • Those looking for an easy to operate electric corded mower.

Where Should I buy this Greenworks 20-Inch Lawn Mower 25022

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Greenworks 12 Amp 20" Corded Lawn Mower, 25022
  • Powerful Cutting: The 12 amp motor and 20-inch steel deck with a 3600 RPM work together to cut through the toughest grass with ease
  • Versatile Cutting Options: The 3-in-1 system allows for mulching, rear bagging, and side discharge, giving you the flexibility to handle clippings in various ways
  • Easy to Use: The easy push button start and single lever 7 position height adjustment make using the mower a breeze, while the cam lock handle allows for easy folding and storage
  • Efficient and Durable: The durable steel 21-inch cutting deck gets the job done quickly and efficiently, while the AC corded power provides unlimited run-time with no gas, oil, or emissions
  • Extension Cord Requirement: It is important to use a 14 gauge 50’ or 12 gauge 100’ extension cord (not included) for optimal performance

Last update on 2024-03-28 / Affiliate links / Images from Amazon Product Advertising API

Not sure about this mower? Click here to see more Corded Electric Lawn Mower Reviews.


What is the deck size of the Greenworks 20-Inch mower?

20-inch deck size.

Is the deck made or steel or plastic on the Greenworks 20-Inch?


What features does the Greenworks 20-Inch mower have?

This is a 3-in-1 mower, offering mulching, side discharge and rear bagging.

Do the handles fold on the Greenworks 20-Inch mower?

Yes, it has foldable handles for compact storage.

How many height adjustments does the Greenworks 20-Inch mower have?

7 height adjustments from 1-1/2 to 3-3/4 inches.

What is the size of the Greenworks 20-Inch wheels?

10 inch rear and 8 inch front wheels. Protection Status

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