Can I Use a String Trimmer to Cut Grass?
Table of Contents
- Introduction
- When to Use a String Trimmer Instead of a Mower
- Step-by-Step: How to Mow with a String Trimmer
- Safety and Protection for You and Your Garden
- Choosing the Right String Trimmer for the Job
- Maintaining Your Lawn After Trimming
- Conclusion
- FAQ
Introduction
Every gardener has faced that moment where the lawn mower won't start, the grass has grown too tall for the deck, or a steep slope makes pushing a heavy machine feel like a workout. In these situations, you might look at your trusty weed eater and wonder: can I use a string trimmer to cut grass? The short answer is yes, you can, though it requires a specific technique to ensure your lawn stays healthy and looks even. At Garden Green Land, we know that having the right tools for the job is essential, but knowing how to adapt those tools is just as important for a thriving garden. This post covers when to use a trimmer for mowing, the best techniques for an even cut, and how to protect your equipment.
When to Use a String Trimmer Instead of a Mower
While a lawn mower is the standard choice for large, flat areas, there are several scenarios where a string trimmer—also known as a weed wacker or strimmer—is actually the superior choice.
Small or Enclosed Spaces
If you have a tiny patch of grass, such as a 100-square-foot townhouse yard or a strip between a fence and a walkway, a full-sized mower is often more trouble than it is worth. A string trimmer is lightweight and easy to maneuver in tight corners—browse our Grass Trimmer collection for handheld and cordless options suited to small sites.
Steep Slopes and Uneven Terrain
Mowers can be dangerous or difficult to handle on steep inclines. A string trimmer allows you to stand on stable ground while reaching down or up a slope to manage the growth—check our broader Garden Tools collection for complementary tools that help with slope work.
Overgrown "Jungle" Grass
If you have neglected an area for weeks and the grass is knee-high, a standard mower will likely stall or clog. Using a string trimmer allows you to "top" the grass in layers, taking it down to a manageable height before finishing with a mower; our blog post “Do I Need a Grass Trimmer?” explains when a trimmer is the right choice for heavy growth.
Obstacles and Edging
Mowers have a "dead zone" where the blade cannot reach up against walls, trees, or garden ornaments. We often use our trimmers to finish these edges, ensuring a crisp look around our Garden Decoration and flower beds.
Quick Answer: Yes, you can use a string trimmer to cut grass, especially in small, steep, or overgrown areas where a mower cannot reach. However, for large lawns, it is difficult to maintain a perfectly level height compared to a traditional mower.
Step-by-Step: How to Mow with a String Trimmer
Cutting a whole lawn with a string trimmer requires more finesse than just whacking weeds. To avoid a "choppy" look, follow these steps to keep the height consistent. For tips on edging and finishing touches, see our guide on Mastering Lawn Edging: How to Edge Grass with a Trimmer.
Step 1: Inspect the Area
Walk through the grass and remove any rocks, sticks, or hidden toys. String trimmers spin at high speeds and can turn a small pebble into a dangerous projectile.
Step 2: Set Your Stance
Hold the trimmer so the head is parallel to the ground. Keep your feet shoulder-width apart and maintain a slight bend in your knees. You want to move your whole body, not just your arms.
Step 3: Use a Scything Motion
Swing the trimmer head in a gentle, wide arc from side to side. As you move forward, overlap each pass by about 50%. This helps ensure you don't leave "mohawks" of tall grass between swings.
Step 4: Monitor the Cutting Height
Try to keep the string roughly 2 to 3 inches above the soil. If you cut too low (scalping), you risk damaging the grass crowns and allowing weeds to take root.
Step 5: Clean the Tool
Once finished, clear any grass buildup from the trimmer guard. Check the line levels so you are ready for your next session — our article “Essential Guide on How to Maintain Garden Tools for Peak Performance” covers routine cleaning and checks that extend tool life.
Trimmer Techniques for Different Tasks
| Task | Technique | Goal |
|---|---|---|
| General Mowing | Flat, horizontal sweeping arcs | Level height across the yard |
| Edging | Turn the head 90 degrees vertically | Crisp line against walks/fences |
| Tall Weeds | Cut from the top down in layers | Prevent the line from tangling |
| Sloped Work | Side-to-side sweeping while walking across | Safety and erosion control |
Safety and Protection for You and Your Garden
Using a string trimmer for extended periods exposes you to more flying debris than a mower does. Because the cutting head is open, safety gear is a requirement, not a suggestion.
- Personal Protection: Wear long pants, closed-toe shoes, and safety glasses. Ear protection is also wise, especially if using a gas-powered model. For hand protection, see our Garden Gloves collection for styles that offer grip and puncture resistance.
- Protecting Your Property: The high-speed string can easily scar wooden fence posts or bark on young trees. We recommend using guards or physical barriers around delicate items.
- Tool Maintenance: Mowing a whole lawn with a trimmer puts more stress on the motor than light trimming. Ensure your string is the correct diameter for your machine to avoid overheating.
Key Takeaway: Proper technique and safety gear are essential when using a trimmer for mowing. Keep the head level and move in overlapping arcs to achieve the most uniform result possible.
Choosing the Right String Trimmer for the Job
Not all trimmers are created equal when it comes to mowing. If you plan to use one frequently for more than just edges, consider these factors:
Power Source
Electric or battery-powered trimmers are great for small yards and are much quieter. However, for large areas of thick grass, a gas-powered trimmer or a high-voltage brushless motor will provide the sustained power needed to prevent stalling — our post “How to Choose the Right Grass Trimmer for Your Garden” walks through power options and runtime trade-offs.
Attachment Versatility
Some systems allow you to swap the string head for other tools. At Garden Green Land, we appreciate tools that work harder for us. Some trimmers can even accept a "mower" base attachment—essentially a set of wheels that holds the trimmer at a fixed height; for shaft and design differences see “Which is Better: Straight or Curved Shaft Grass Trimmer?”.
Line Type
For mowing, a twisted or "serrated" string often cuts cleaner than a standard round line. A cleaner cut helps the grass heal faster and prevents the tips from turning brown.
Maintaining Your Lawn After Trimming
Because a string trimmer "tears" the grass slightly more than a sharp mower blade, the lawn may need a little extra TLC after a heavy trim.
- Hydration: If you trimmed a large area, give it a light watering to help the grass recover from the stress of the cut — check our Watering & Irrigation collection for timers and kits that make post-trim watering easy.
- Clear the Clippings: Trimmers don't mulch grass. If the clippings are thick, rake them up so they don't smother the living grass underneath.
- Check Your Edges: After the main area is cut, go back and use the vertical edging technique to polish the look around your Garden Furniture or walkways.
Bottom line: While a string trimmer isn't the primary tool for a large suburban lawn, it is a versatile "utility player" that can handle small spaces, hills, and overgrown patches where a mower fails.
Conclusion
Using a string trimmer to cut your grass is a practical solution for many home gardeners dealing with tricky terrain or small spaces. By using a steady, sweeping motion and keeping the trimmer head level, you can achieve a respectable look without the need for a bulky mower. At Garden Green Land, we believe in making gardening accessible and functional for everyone, regardless of the size of your green space. Whether you are clearing an overgrown corner or maintaining a small balcony-side patch, the right technique makes all the difference. Grab your gloves, put on your safety glasses, and get out there — and if you need a trimmer, browse our Grass Trimmer collection to find the best fit for your yard.
FAQ
Can I use a string trimmer if the grass is wet?
It is possible, but not recommended. Wet grass is heavier, which puts more strain on the trimmer motor, and the blades of grass tend to clump together, resulting in an uneven, ragged cut that can lead to lawn disease.
Will using a trimmer instead of a mower hurt my grass?
If done correctly, it won't hurt the grass. However, because trimmers use a high-speed string rather than a sharpened metal blade, they tend to "shred" the tips of the grass, which can cause the lawn to look slightly brown for a day or two as it heals.
How do I keep a consistent height when mowing with a trimmer?
The best way is to use your body as a guide. Keep the trimmer at a fixed distance from your waist or hip and move your whole body in a side-to-side motion, rather than just swinging your arms, to maintain a level plane.
Is it faster to use a trimmer or a mower?
For a standard flat lawn, a mower is much faster and more efficient. A trimmer is only faster for very small areas, steep hills, or places where you would otherwise have to stop and move obstacles out of the way of a mower.
