How To Edge A Lawn With A String Trimmer [The Absolute Guide]

Mowing the lawn makes your backyard looks tidy. But for a truly manicured appearance, you have to edge the grass along the driveway or walkways. Now, are you up for edging your lawn but do not have any edger?

Don’t worry! You have several edging options. I have seen many homeowners or professionals use a weed whacker to get this job done. If you don’t want to invest in a separate machine yet wish for the perfectly manicured look, I have come with the tips and tricks on how to edge a lawn with a string trimmer.

Let’s go through the steps, and I will demonstrate exactly how this is done. With a little practice, you can transform your trimmer into a quick and easy edging tool.

String Trimmers Vs. Edgers

String trimmers and edgers are lawn maintenance equipment. They have similarities but have different functions. The proper use of these tools can make your lawn tidy in no time.

String Trimmer

A string trimmer or also known as ‘weed eater’, ‘weed whacker’, ‘weed whip’, ‘line trimmer’, ‘brush cutter’, ‘whipper snipper’, is an electric or gas-powered tool for cutting grass, small weeds, and groundcover.

Its mobile nature makes it easy to reach grass around houses, trees, buildings, or other construction. It uses a whirling monofilament line instead of a blade and projects from a rotating spindle at the end of a long shaft.


An edger is a piece of equipment for forming distinct boundaries between a lawn and another paved ground surface. Typically, it is used for defining clean boundaries or stop grass incursion.

These motorized or manual tools use a vertical spinning blade to cut neatly for sharp and clean borders.

So, these two tools make a good team as the edgers are mainly for cutting edges and creating boundary lines. And you can maintain those boundary lines by the string trimmer.

How To Edge Your Lawn With A String Trimmer

Though trimmer is not dedicatedly meant for edging, you can still get your job done. Right off the bat, you have to read the manufacturer’s instructions to ensure you’re using the tool properly.

Step 1: Switching on the machine

Firstly, you should check the fuel status and battery power. Then, switch-on the trimmer according to the manual. Generally, weed whacker rotates clockwise. But it is recommended to check the rotation to have the best direction for edging.

Step 2: Inclining the trimmer

Now, take your whacker with one hand on the handle and the other one on the trigger. Now, rotate the tool in a way that the string is facing vertically downwards on the edge you want to trim. You will see that the whacker will cut a much narrower accurate section at this angle.

Step 3: Lining up

Line up the string on the tool with the lawn edge. Then, press the trigger to start the spinning. You have to ensure that you are keeping a firm grip on the shaft to hold it in position. Now walk in the direction of the spin.

Step 4: Edging the lawn

Now lower the trimmer to the surface level until it trims the overgrown grass on the sidewalk. Now keep the machine in the position and walk along the path.

Another Way: In shoulder-Mount System, your goal is to get the trimmer head close to 90 degrees with the ground level. Holding the trimmer next to the shoulder, you can rest the shaft on my arm and significantly reduce back strain.

Tips For Edging Using A String Trimmer

A string trimmer can create a dangerous situation for the operator and bystanders if you don’t maintain the protective gear or safety measures.

From the furious action of the turning head and plastic string to the flying dust and debris – you should be careful about all these matters. And especially when you hold the tool at a different angle from what it was built for, it tends to shoot debris.

  • People struggle with the spin direction. When you are moving along the path, you have to keep the right side of your body closer to the work to cut and eject to the left. Thus, you will not suffer from – piling up along your cut line, scalping, or scarring the lawn.
  • Always wear the Personal Protective Equipment (PPE), and the most likely includes gloves, long pants and sleeves, eye, face, and ear protection. Since repeated exposure to the engine noise can cause ear damage, wearing earmuffs or earplugs is always recommended.
  • You should not use the trimmer if people are around or until they have passed.
  • Never remove the shield as it is for reducing the amount of flying debris.
  • Never go for a blade that was not designed to use as an edging blade.

Frequently Asked Questions (FAQs)

Is An Electric Or Gas Powered String Trimmer Better For Edging?

Both types deliver the same results. However, electric trimmers do generally offer a weight advantage over gas-powered ones. On the contrary, the gas-powered ones are more powerful, and you do not have to get tangled with the cords.

How often should you edge your lawn?

You should edge your lawn when you are mowing it. Check them when the hot seasons are going on as they tend to grow much in that time.

How can I edge my lawn without an edger?

You can either use a trimmer or a shovel to edge your lawn

This Video Can Teach You How To Edge A Lawn With A String Trimmer:


Without edging, grass tends to grow over the boundary between your lawn and the surrounding sidewalk, giving your lawn an unkempt look. If you follow my steps on how to edge a lawn with a string trimmer, you can expect impressive results. Let me know which trimmer you have used for the edging. The technique is the same regardless of the brand that all of you are using.

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