When the lawn mower bogs down halfway up a hill of knee-high grass, you start searching for a real answer. After three months of testing string trimmers on everything from overgrown fence lines to retention pond edges and a stubborn patch of Japanese knotweed behind the goat pen, we landed on the eight best string trimmers for tall grass for 2026. Our team put each model through real-world use on rural property, compared cutting swath, brushless motor output, line feed reliability, and how each felt at the end of an hour of sweeping through thick weeds. The short answer: a brushless cordless trimmer with a 15 to 17 inch cutting swath, a bump feed head, and at least a 40V battery platform will chew through tall grass where a 20V model stalls.
A string trimmer, often called a weed whacker or weed eater, is the tool that handles the places a mower cannot reach. Tall grass, overgrown fence lines, hillside brush, and saplings all fall to a good trimmer with the right line. The wrong tool stalls in thick weeds, chews through line, and burns through a small battery in fifteen minutes. The right one keeps cutting, holds a charge, and feels balanced in your hands even when you are clearing half an acre of overgrown field.
Our testing pool covers eight trimmers across price tiers and power platforms: entry-level 20V models for small yards, mid-range 40V workhorses, and 56V to 60V brushless beasts that rival small gas engines. Every trimmer here earned its spot by cutting tall grass without bogging down, holding a usable charge, and surviving a season of regular use on rural property. If you need a quick recommendation, jump to the top three below. If you want the full breakdown, every product review, our buying guide, and the technique section that will save you an hour of frustration, keep scrolling.
Table of Contents
Top 3 Picks at a Glance (September 2026)
EGO POWER+ ST1502SA 15 inch
- 15 inch swath
- Brushless 56V motor
- 45 min runtime
- Rapid Reload head
Best String Trimmers for Tall Grass in 2026 – Quick Comparison
| Product | Specifications | Action |
|---|---|---|
| BLACK+DECKER LST300 20V MAX |
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| Worx WG154 20V 10 inch |
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| EGO POWER+ ST1502SA 15 inch |
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 DEWALT 60V DCST972X1 17 inch |
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 BLACK+DECKER LST136B 40V MAX |
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 Wugeku 40V 14 inch |
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 Greenworks 60V 16 inch |
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 RYOBI 40V Attachment Capable |
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1. BLACK+DECKER LST300 – Best Cordless String Trimmer for Tall Grass Overall
BLACK+DECKER 20V MAX String Trimmer and Edger 2 in 1, Cordless Weed Wacker with Auto Spool Feed, Battery and Charger Included, 12 Inch Steel Deck, Reduced Vibration (LST300)
12 inch swath
5.7 lbs
Auto Feed Spool
2-in-1 trim and edge
Pros
- Lightweight at 5.7 pounds and easy to maneuver
- Auto Feed Spool advances line without bumping
- Quick 2-in-1 trim to edger conversion
- Quiet operation compared to gas trimmers
- Battery compatible with other BLACK+DECKER 20V tools
Cons
- Limited power for thick weeds beyond grass
- Battery life short for larger yards
I tested the BLACK+DECKER LST300 for thirty days on a half acre suburban yard that grows tall fescue and the occasional patch of wild onion. For routine edging and weekly maintenance on grass that never gets above six inches, the LST300 is genuinely hard to beat. The 12 inch cutting swath covers enough ground in a single sweep that I finished the backyard edge in under twelve minutes, battery still showing two of three indicator lights.
The Auto Feed Spool (AFS) is the feature that saves the most time. Instead of stopping to bump the head on the ground and waste line, the trimmer feeds fresh line automatically as it wears down. I went through one full spool of line over four trimming sessions without once stopping to manually advance. The Powerdrive transmission delivers 6200 RPM, which sounds modest on paper but cuts cleanly through thick fescue without bogging. The 2-in-1 trimmer to edger conversion works with one motion: pivot the head, lock the wheel down, and you are edging along a sidewalk.
Where the LST300 starts to struggle is anything beyond grass. I tried it on a stretch of three foot tall goldenrod that had gone unchecked since spring, and the motor stalled twice in fifteen feet. The 20V platform simply does not have the torque for woody or fibrous weeds. For fence lines that get trimmed weekly, this is a non-issue. For overgrown fields and saplings, you will need to step up to a 40V or 60V brushless model.
Reviewers on forums and Amazon back this up: the LST300 earns consistent praise for being lightweight, quiet, and easy to assemble out of the box. Owners consistently mention the auto feed spool as the standout feature. The recurring complaint is battery runtime on bigger yards, which is why I recommend buying a second 20V battery if you go this route. The included 2.0Ah pack handled my half acre on one charge, but anything bigger will demand a backup.
Build quality and warranty coverage
The LST300 ships with a 2 year limited warranty and feels solid in the hands despite the light weight. The adjustable handle and height positions let me dial in a comfortable stance, and the wall mountable charging base keeps the garage tidy. The plastic guard is large enough to deflect clippings from my shoes and lower legs, though I still wore long pants during testing.
Who should buy the LST300
The LST300 is the right trimmer for homeowners with small to medium yards who need a reliable tool for weekly maintenance. If your tall grass tops out at six to eight inches and your weeds are limited to lawn edge encroachment, the LST300 delivers everything you need without the cost or weight of a 40V or 60V platform.
2. Worx WG154 – Best Value String Trimmer for Light Tall Grass
Worx 20V 10″ 2-in-1 Cordless String Trimmer & Lawn Edger for Yard, WG154
10 inch swath
4.2 lbs
PowerShare battery
180 degree head rotation
Pros
- Ultra lightweight at 4.2 lbs
- Quick 2-in-1 trimmer to edger conversion
- Auto feed line system reduces interruptions
- Adjustable flower guard protects garden plants
- Compatible with WORX PowerShare battery platform
Cons
- Smaller 10 inch cutting swath less suited for large areas
- Lower 2800 RPM motor limits heavy duty cutting
The Worx WG154 is the trimmer I recommend to anyone who trims a small yard and wants to spend as little as possible while still getting a quality tool. At 4.2 pounds, it is the lightest trimmer in our lineup, which made a real difference during a 45 minute edging session on a 90 degree afternoon. My forearm and shoulder were noticeably less tired than after testing the heavier brushless models.
The 2-in-1 design is genuinely useful. The head rotates 180 degrees with a single button push, the wheel pops down, and you are ready to edge along a walkway. I went back and forth between trimming and edging four times during a single test session without any mechanical issues. The PowerShare 20V battery platform is the bigger win: I already own a WORX 20V drill and blower, so the WG154 dropped into my existing battery ecosystem without an extra purchase.
The tradeoff for that light weight and low cost is cutting power. The 2800 RPM motor and 10 inch swath are fine for weekly trimming of lawn edge grass but undersized for genuinely tall grass. I tested the WG154 on a patch of tall fescue that had grown to about ten inches over a missed week, and the trimmer handled it but slowly. Anything beyond a foot of growth, or fibrous weeds like wild carrot, will frustrate this tool. Reviewers on lawn care forums echo this: the WG154 is widely praised for small yards and edging but called out as underpowered for heavy brush or rural property work.
The auto feed line system worked well in my testing. I went through three sessions before needing to refill the spool, and the line replacement itself takes about two minutes once you have done it once. The flower guard is a small but thoughtful feature for anyone with established garden beds: it acts as a physical barrier between the spinning line and your plants, so you do not have to edge as carefully.
PowerShare battery platform value
If you already own any WORX 20V tool, the WG154 is a no-brainer. The battery swaps in seconds and you already have a charger. If you are starting from scratch, factor the battery and charger cost into your decision: the bare tool pricing undercuts competitors, but the kit pricing lands in the same range as comparable 20V trimmers from BLACK+DECKER and Ryobi.
Who should buy the WG154
Pick the WG154 if your yard is under a quarter acre, your grass gets trimmed weekly before it gets truly tall, and you want a lightweight tool that handles edging and trimming in one package. Skip it if you have half an acre of rural property or any meaningful amount of overgrown brush. The 10 inch swath and modest motor will leave you wishing you had bought a 40V model.
3. EGO POWER+ ST1502SA – Best Brushless String Trimmer for Tall Overgrown Grass
EGO POWER+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1502SA
15 inch swath
5800 RPM brushless
45 min runtime
Rapid Reload head
Pros
- Powerful brushless motor handles thick and woody weeds
- 15 inch cutting swath covers ground quickly
- Rapid Reload head makes line changes easy
- Compatible with all EGO 56V ARC Lithium batteries
- Up to 45 minutes runtime per charge
- 5 year tool warranty and 3 year battery warranty
Cons
- Bump feed string advance can be inconsistent
- Some users find restringing process confusing
- 2.5Ah battery may be limiting for very large properties
The EGO POWER+ ST1502SA is the trimmer that made me stop missing my old gas Stihl. I ran it through a patch of three foot tall orchard grass mixed with thistles, and the brushless motor chewed through without bogging once. The 5800 RPM rating sounds impressive on paper, but the real-world feel is what sold me: the trimmer held its speed even when I forced the head deep into thick weeds. Most cordless trimmers I tested slowed under that load, but the EGO kept cutting.
The 15 inch cutting swath covers more ground per pass than the 12 inch BLACK+DECKER, which translated to finishing the same fence line in roughly 70 percent of the time. For anyone with more than a quarter acre of trimming work, that swath matters. The Rapid Reload head is the standout convenience feature: instead of disassembling the spool, you feed line through two eyelets, crank the head, and the line winds itself. The first reload took me about 90 seconds; by the third I had it down to 40.
The 56V ARC Lithium battery platform is the bigger story. EGO’s ecosystem spans mowers, blowers, chainsaws, and hedge trimmers, all sharing the same battery. I tested the ST1502SA with a 5.0Ah battery I already own for the EGO mower, and runtime stretched past an hour in light trimming. The included 2.5Ah pack delivered about 45 minutes of mixed use, which is enough for most yards. For very large properties, the 7.5Ah and 10.0Ah batteries are available separately and would push runtime past two hours.
The bump feed head was my only consistent frustration. Out of roughly 30 bump attempts during testing, about four failed to advance line cleanly. Forum owners on r/EGO and lawnsite report the same pattern: bump feed works most of the time, occasionally requires a second tap, and is the trimmer’s biggest design compromise compared to true automatic feed heads. The restringing process also has a learning curve that puts off first-time users, but the EGO manual walks through it clearly.
Brushless motor and warranty backing
The brushless motor delivers noticeably more torque and longer motor life than brushed equivalents. EGO backs the tool with a 5 year limited warranty and the battery with 3 years, which is the strongest coverage in this price range. For a homeowner who wants a cordless trimmer that will last a decade of regular use, the warranty alone tips the scales.
Who should buy the ST1502SA
The ST1502SA is the right pick for anyone with a half acre or more of trimming work who wants genuine cordless power without gas maintenance. If you already own EGO 56V tools, this trimmer slots into your ecosystem and is an easy decision. If you are starting fresh and want one trimmer that handles tall grass, overgrown weeds, and fence line brush without complaint, the EGO is the one to shortlist.
4. DEWALT 60V DCST972X1 – Best Heavy Duty String Trimmer for Thick Brush
DEWALT 60V Cordless String Trimmer with Battery & Charger Included, 17 Inch, Attachment Capable (DCST972X1)
15 or 17 inch swath
8000 RPM brushless
Attachment capable
15 lbs
Pros
- Strong brushless motor performance
- Adjustable 15 or 17 inch swath for flexible runtime vs coverage
- Compatible with DEWALT universal attachments
- Variable speed control for precision trimming
- Solid 3 year warranty coverage
Cons
- Heavier at 15 pounds
- Higher price point than entry level trimmers
The DEWALT 60V DCST972X1 is the trimmer I reached for when the job got genuinely ugly. I tested it on a stretch of three year old blackberry brambles that had grown into a four foot wall along a fence, and the 8000 RPM brushless motor cut through the canes as if they were grass. The 17 inch swath option (which uses thicker 0.095 inch line) covers more ground than any other trimmer in this lineup, and the 15 inch option gives better runtime when the weeds are thinner.
The DEWALT universal attachment capability is the long-term value play. The trimmer head swaps out for a hedge trimmer, pole saw, edger, or cultivator with a quick-connect coupling. If you already own DEWALT 60V tools, you can build out a full yard care system on one battery platform. I tested the edger attachment and the swap took about 30 seconds with no tools. For rural property owners, this flexibility replaces multiple standalone tools.
The 15 pound weight is the real tradeoff. After 40 minutes of continuous trimming, my shoulder and forearm felt the difference between this and the 7.4 pound EGO. The included shoulder strap helps, but this is a two-handed tool that demands some upper body strength. Owners on r/dewalt and contractor forums confirm the same: this is a professional-grade trimmer and weighs accordingly.
The variable speed trigger with hi/lo speed control is the feature that saved the most line during testing. On low, the trimmer idles through thin grass and barely touches the line. On high, it chews through thick weeds but goes through line roughly twice as fast. Learning when to drop down to low is the difference between a 20 minute spool and a 40 minute spool.
DEWALT 60V battery ecosystem
DEWALT’s 60V FlexVolt battery works across their outdoor and power tool lines, which means a contractor or serious DIYer can share batteries between a trimmer, chainsaw, miter saw, and drill. For a homeowner, the value depends entirely on whether you already own other DEWALT 60V tools or plan to buy them. The bare tool pricing is significantly lower than the kit pricing.
Who should buy the DCST972X1
Pick the DEWALT if you need a trimmer that handles thick brush, blackberries, and saplings without slowing down. The attachment capability makes it the right choice for anyone who wants to expand into a multi-tool yard system on a single battery platform. If you have a small yard and trim weekly, this is overkill: the EGO ST1502SA delivers 80 percent of the cutting performance at lower weight and cost.
5. BLACK+DECKER LST136B – Best Budget 40V String Trimmer
BLACK+DECKER 40V MAX String Trimmer and Lawn Edger, 13 Inch Weed Eater, Far Reach, Battery and Charger Not Included (LST136B)
13 inch swath
40V MAX
Power Command dial
Powerdrive transmission
Pros
- Strong 40V MAX power output
- Power Command dial balances power vs runtime
- Powerdrive transmission aids cutting performance
- Continuous automatic feed spool
- Quick trimmer to edger conversion
- 3 year limited warranty
- Compatible with BLACK+DECKER 40V battery platform
Cons
- Battery and charger sold separately for bare tool
- Lower 1400 RPM motor rating
The BLACK+DECKER LST136B hits a sweet spot for homeowners who want 40V power without paying premium prices. I tested it with a 40V 2.0Ah battery I already own for a BLACK+DECKER mower, and the trimmer delivered noticeably more torque than the 20V LST300 on the same tall fescue. The Power Command dial is the feature I appreciated most: turn it up for thick weeds and the motor delivers maximum power, turn it down for routine edging and the battery lasts twice as long.
The 13 inch cutting swath lands between the LST300’s 12 inches and the EGO’s 15 inches. For a quarter acre yard, that middle ground covers ground fast enough without making the trimmer feel unwieldy. The Powerdrive transmission helps the motor maintain RPM under load, which I confirmed when forcing the head into a thick patch of orchard grass. The LST136B bogged briefly but recovered, where a 20V model would have stalled.
The bare tool configuration is the main gotcha. The LST136B ships without a battery or charger, which lowers the upfront cost but means you need to buy those separately if you do not already own BLACK+DECKER 40V tools. The kit configuration with a 40V 2.0Ah battery and charger is the better value for first-time buyers, and the price difference is modest.
The automatic feed spool worked flawlessly through my testing. I went through four trimming sessions without a single manual line advance, which is the kind of reliability that makes a trimmer feel invisible in the workflow. The trimmer to edger conversion is a single lever pull and the wheel snaps into place. I switched back and forth between trimming and edging five or six times during a single session without any issues.
40V battery platform expansion
BLACK+DECKER’s 40V platform covers mowers, hedge trimmers, chainsaws, leaf blowers, and more. If you already own BLACK+DECKER 40V outdoor tools, the LST136B slots in for free. Starting fresh, factor a 40V battery and charger into your decision. Once you have them, the platform pays for itself if you add a second tool.
Who should buy the LST136B
The LST136B is the right trimmer for homeowners who want 40V power for taller grass and thicker weeds without paying for a brushless motor. If your yard is a quarter acre or more and your grass gets away from you occasionally, this trimmer will handle the surge in growth that overwhelms 20V models. Skip it if you already own a different brand’s 40V or 60V battery platform: the battery ecosystem matters more than the trimmer specs.
6. Wugeku 40V 14 inch – Best String Trimmer with Brush Cutter Blade Attachment
WUGEKU 40V 14″ String Trimmer, .095″ Dual Line, Fits Makita 18V LXT
14 inch swath
Brushless 40V
2x 4Ah batteries
Includes 3T and 40T blades
Pros
- Brushless motor for higher torque and longevity
- Dual batteries deliver extended runtime up to 60 minutes
- Includes 3T blade
- 40T alloy blade
- and string spool head
- Compatible with Makita 18V LXT batteries
- Folding shaft for compact storage
- Padded shoulder strap reduces fatigue
Cons
- Lower review count and brand familiarity
- 15 percent one star ratings suggest occasional reliability concerns
The Wugeku 40V is the trimmer that earned its spot on this list because of what comes in the box. Most string trimmers ship with a single string spool head. The Wugeku ships with three cutting options: a string spool head for grass, a 3-tooth blade for thick weeds, and a 40-tooth alloy blade for brush and small saplings. I tested the 40-tooth blade on a patch of woody growth that included stems up to half an inch thick, and the blade cut through cleanly without bogging.
The dual 4.0Ah battery configuration is a real advantage. Each battery is a 20V unit wired in series to deliver 40V output, and the kit includes both. Runtime stretched past an hour on low speed during my testing, which is enough to clear a quarter acre of overgrown field on a single charge. The dual-port fast charger refills both batteries in roughly two hours.
The brushless motor is the standout engineering feature at this price point. Brushless motors deliver more torque, run cooler, and last significantly longer than brushed equivalents. Most trimmers in this price range ship with brushed motors, so the Wugeku’s brushless design is unusual and welcome.
The Makita 18V LXT battery compatibility is a niche but useful feature. If you already own Makita 18V tools, the Wugeku accepts those batteries as well, which lowers the cost of entry for anyone expanding into a new brand. I tested with a Makita 5.0Ah battery and the trimmer ran normally.
The brand unfamiliarity is the main caveat. Wugeku is not a household name like EGO, DEWALT, or Stihl. The 15 percent one-star rating (compared to 5 to 10 percent on the brand-name competitors) suggests some quality control inconsistency. Forum owners on lawnsite and Amazon reviews echo this: most buyers are happy, but a small minority report motor failures within the first year.
Folding shaft and storage
The quick-release folding shaft is a small but useful feature for anyone with limited garage space. The shaft folds in half, reducing the trimmer length to roughly 35 inches, which fits in a closet or car trunk without disassembly. I tested the fold and unfold mechanism about a dozen times during the testing period and it held up without any wobble or loose joints.
Who should buy the Wugeku
Pick the Wugeku if you need a trimmer that handles thick brush and small saplings in addition to tall grass. The included blades make it a versatile tool for rural property work. If you want a name-brand warranty and proven long-term reliability, the EGO or DEWALT trimmers are safer choices despite the higher price.
7. Greenworks 60V 16 inch – Best String Trimmer for Large Properties
Greenworks 60V 16 in Cordless String Trimmer, 4.0 Ah Battery
16 inch swath
60V brushless
10000 RPM
Load N Go head
Pros
- Powerful 60V brushless motor rivaling gas trimmers
- 16 inch cutting width covers more ground
- Load N Go head speeds up line reloading
- Attachment capable design expands versatility
- Shoulder strap distributes weight
- 4 year limited warranty covers tool and battery
- Quieter than gas powered trimmers
Cons
- Heavy at 18.7 lbs
- Top heavy handling reported
- Some users find charger fan noise noticeable
The Greenworks 60V is the trimmer that owners on Amazon and lawnsite describe as a “beast” with power comparable to a 25cc gas engine. The 10000 RPM brushless motor is the highest in our test pool, and it showed in the field: I cleared a half acre of mixed tall grass and woody weeds in 35 minutes, which would have taken 50 minutes with the EGO. The 16 inch cutting swath covers more ground per pass than any other trimmer here except the DEWALT’s 17 inch option.
The Load N Go head is the convenience feature that earned the most praise from reviewers. Reloading line takes roughly 60 seconds: feed line through two eyelets, click the head into reload mode, and turn. The first reload took me about 90 seconds; by the third I had it down to 45. For anyone who burns through line regularly on thick weeds, that time savings adds up.
The 18.7 pound weight is the biggest compromise. This is the heaviest trimmer in our lineup, and the top-heavy balance (motor near the head) makes it feel heavier than the number suggests. The included shoulder strap helps, but this is a tool that benefits from being used in shorter sessions with rest breaks. Owners with smaller frames report arm fatigue after 30 minutes.
The Greenworks 60V battery platform covers mowers, blowers, chainsaws, snow blowers, and more. The 4.0Ah battery that ships with the trimmer works across all of them, which makes the platform attractive for homeowners building out a battery-powered yard system. Greenworks backs the tool and battery with a 4 year limited warranty, which is the strongest coverage in this lineup alongside the EGO.
Attachment capable design
Like the DEWALT, the Greenworks trimmer head swaps out for other attachments: edger, hedge trimmer, pole saw, and cultivator. The quick-connect coupling takes about 30 seconds to swap. For rural property owners who need multiple yard tools, the attachment ecosystem is a real value.
Who should buy the Greenworks 60V
Pick the Greenworks if you have a large property, need to clear tall grass and thick brush quickly, and want a trimmer that doubles as the head of a multi-tool yard system. If you have a smaller yard or want a lighter tool, the EGO ST1502SA delivers most of the cutting power at half the weight.
8. RYOBI 40V Attachment Capable – Best String Trimmer for Expand It Ecosystem
RYOBI 40-Volt Lithium-Ion Cordless Attachment Capable String Trimmer, 4.0 Ah Battery and Charger Inc
13 to 15 inch swath
40V
Variable speed
Reel Easy bump feed
Pros
- Powerful 40V performance for thick grass and blackberries
- Attachment capable with RYOBI expand it system
- Variable speed trigger for cutting control
- Compatible with existing RYOBI 40V batteries
- Quieter and easier than gas trimmers
Cons
- Heavier at 13.9 lbs
- Battery runtime may be shorter than expected for heavy tasks
- Some users reported battery or engine heat issues
The RYOBI 40V is the trimmer I recommend to anyone already invested in the RYOBI 40V battery platform. The expand-it attachment system accepts a wide range of add-ons: edger, hedge trimmer, pole saw, cultivator, leaf blower, and even a snow thrower attachment. The trimmer head swaps for any of these in about 30 seconds, which makes the RYOBI a versatile centerpiece for a battery-powered yard system.
The 40V motor delivered solid cutting power during testing. I ran it through a patch of three foot tall fescue mixed with thistles, and the trimmer held its speed without bogging. The variable speed trigger is the standout control feature: squeeze gently for thin grass and the line barely touches, squeeze fully for thick weeds and the motor delivers maximum torque. This kind of control saves line and battery on every pass.
The 13.9 pound weight sits between the EGO and the heavier DEWALT and Greenworks trimmers. After 45 minutes of continuous trimming, I felt shoulder fatigue that I did not feel with the lighter EGO. The included 4.0Ah battery delivered about 40 minutes of runtime in mixed use, which is enough for most yards but short of the longest-runtime trimmers in this lineup.
Forum owners on r/ryobi and lawnsite echo the testing results: the RYOBI is a capable trimmer for thick grass and even blackberries, with the attachment ecosystem being the long-term value. The recurring complaint is battery runtime under heavy load, which is consistent with any 40V platform running a brushless motor at high RPM. Owners who already own multiple RYOBI 40V batteries report the trimmer running all day on rotation.
RYOBI 40V ecosystem value
RYOBI’s 40V platform is one of the broadest in the cordless outdoor tool market. Mowers, blowers, chainsaws, hedge trimmers, snow blowers, and even a riding mower share the same battery. For a homeowner who wants to standardize on one battery platform across many tools, RYOBI delivers the widest selection at competitive prices.
Who should buy the RYOBI 40V
Pick the RYOBI if you already own RYOBI 40V tools or plan to build out a battery-powered yard system. The attachment ecosystem is the long-term value play, and the trimmer itself is a capable tool for tall grass and thick weeds. If you want a single-purpose trimmer and do not care about attachments, the EGO ST1502SA or DEWALT 60V are stronger choices.
String Trimmer Buying Guide for Tall Grass
Choosing the best string trimmer for tall grass comes down to four decisions: power source, cutting swath, shaft type, and line feed mechanism. Get these four right and the trimmer handles anything you throw at it. Get them wrong and you spend an hour fighting a stalled motor on a job that should take fifteen minutes.
Battery vs gas vs corded for tall grass
Cordless battery trimmers have caught up to gas in cutting ability for most homeowner use cases. The brushless motors in 40V, 56V, and 60V platforms deliver torque that rivals small gas engines without the noise, vibration, or maintenance. Gas trimmers still win for all-day professional use and extreme brush, but for homeowners clearing fence lines and overgrown fields a few times a season, cordless is the right choice.
Corded electric trimmers are limited by extension cord reach and tend to have smaller motors, which makes them poor choices for tall grass. The 20V entry-level cordless trimmers (like the BLACK+DECKER LST300 and Worx WG154) are fine for lawn edge maintenance but stall in thick weeds. Step up to 40V or higher for genuine tall grass capability.
Cutting swath and line diameter
Cutting swath is the width of grass the trimmer cuts in one pass. A 10 to 12 inch swath works for small yards and edging. A 13 to 15 inch swath is the sweet spot for most homeowners with quarter to half acre properties. A 16 to 17 inch swath is for large properties or rural land where you want to cover ground fast.
Line diameter affects what the trimmer can cut. Standard 0.065 to 0.080 inch line handles grass and thin weeds. Thicker 0.095 inch line (used in the EGO, DEWALT, and Greenworks trimmers here) handles thick weeds and light brush. For saplings and woody growth, you need a brush-cutter blade attachment instead of line.
Straight shaft vs curved shaft
Straight shaft trimmers reach further under bushes, decks, and fence lines. Curved shaft trimmers are lighter and easier to maneuver for edging work. For tall grass specifically, straight shaft trimmers tend to perform better because the longer shaft gives you leverage and reach. The trimmers in this lineup are all straight shaft except the Worx WG154, which uses a slightly curved shaft for compact storage.
Bump feed vs automatic line feed
Bump feed requires you to tap the trimmer head on the ground to advance line. It is reliable and lets you control exactly how much line is exposed. Automatic line feed advances line as it wears, which is convenient but can over-extend line and waste it. The best trimmers use a hybrid: bump feed primary with quick reload heads that make restringing fast.
Brush cutter blade attachments for very tall weeds
For genuinely overgrown areas with saplings, blackberry brambles, and woody weeds, a brush cutter blade attachment replaces the string head and cuts through what line cannot. The Wugeku 40V ships with both string and blade heads, and the DEWALT and Greenworks trimmers accept brush cutter attachments through their universal coupling systems. For rural property owners, having both options available is a real advantage.
How to Cut Tall Grass with a String Trimmer?
Cutting tall grass is different from trimming lawn edges. The technique that works on weekly maintenance will bog down or leave clumps on truly overgrown areas. After testing these trimmers on three foot tall grass and woody weeds, here is the step-by-step technique that consistently produced clean cuts without stalling the motor.
Step 1: Reduce the swath before the first pass
If your trimmer has an adjustable swath (like the DEWALT DCST972X1 with its 15 or 17 inch option), start with the smaller swath for the first pass through tall grass. A wider swath loads more material into the line at once and bogs the motor faster. After the first pass knocks down the bulk, switch to the wider swath to clean up.
Step 2: Work from the top down
Instead of swinging the trimmer head at the base of the grass, sweep it across the tops first to knock down the upper growth. This prevents the cut material from wrapping around the head and lets you see what you are doing. After the tops are down, make a second pass at the base to cut the stems cleanly.
Step 3: Use the scything motion for thick patches
The standard side-to-side sweeping motion works for thin grass and weekly maintenance. For genuinely tall, thick grass, switch to a scything motion: a long, slow arc that lets the line cut through steadily rather than chopping. Move at walking pace and let the line do the work. Rushing the cut is what stalls the motor.
Step 4: Bump feed line as you go
As line wears down from cutting thick material, bump the head on the ground every 30 seconds or so to advance fresh line. Fresh line cuts faster and reduces motor strain. If you are using an automatic feed head (like the BLACK+DECKER AFS), monitor the line length and trim manually if the head over-extends.
Step 5: Clear the cut material periodically
Cut grass accumulates around the head and under the debris guard. Every 10 to 15 minutes, stop and clear the buildup with a gloved hand or stick. Accumulated clippings reduce cutting efficiency and can throw the motor out of balance. This single habit will extend your trimming sessions and reduce motor fatigue.
Step 6: Use a brush cutter blade for saplings and woody growth
If you hit saplings thicker than your thumb, stop using string. Swap to a brush cutter blade (or use a trimmer that accepts one like the Wugeku, DEWALT, or Greenworks). String line will wear out instantly on woody growth and can throw debris dangerously. The blade cuts cleanly and safely.
Best String Trimmers for Tall People
Tall operators (6 feet 2 inches and above) frequently complain about trimmer shaft length and reach. The standard shaft length on most cordless trimmers is 50 to 70 inches, which works for average-height users but forces taller operators into awkward stances. The DEWALT DCST972X1 and Greenworks 60V both offer longer shaft options and adjustable handles that extend the effective reach by 3 to 5 inches. The Wugeku’s telescoping shaft design adjusts for user height without tools.
Beyond shaft length, taller operators should look for trimmers with adjustable front handles and shoulder straps. The shoulder strap transfers weight from the arms to the torso, which reduces fatigue over longer sessions. The Greenworks, DEWALT, Wugeku, and RYOBI trimmers all include shoulder straps. The EGO and BLACK+DECKER trimmers sell straps separately.
For genuinely tall operators clearing rural property, the Wugeku’s folding shaft and telescoping adjustment is the most ergonomic option in this lineup. For shorter operators, the Worx WG154 and BLACK+DECKER LST300 are easier to control because of their compact size and lighter weight.
String Trimmer Safety and Maintenance
String trimmers spin line at thousands of RPM and throw debris at dangerous speeds. Eye protection is non-negotiable: always wear safety glasses or a face shield when operating any trimmer. Long pants, closed-toe shoes, and hearing protection (especially for gas trimmers) round out the basic safety kit. For thick brush and saplings, consider chainsaw chaps to protect your legs from thrown debris.
Maintenance is minimal but matters. After each session, clear cut material from the head and debris guard. Every 10 to 15 hours of use, check the spool for wear and replace line if it shows fraying. At the end of the season, drain the battery to 50 percent charge for winter storage and store the trimmer in a dry location. Gas trimmers need fuel stabilizer, oil changes, and air filter cleaning. Cordless trimmers need only battery care.
If your rural property includes areas you maintain with other tools, our guides on string trimmer mowers for tall grass and wheeled string trimmers for fence lines cover two related use cases that this roundup does not address. For hay producers and livestock owners, our grass vs legume hay guide and grass tetany prevention guide cover pasture management beyond the trimmer itself.
Frequently Asked Questions
What is the best string trimmer for tall, thick grass?
For tall, thick grass, a brushless cordless trimmer with at least a 40V battery, 15 to 17 inch cutting swath, and 0.095 inch line is the right tool. The EGO POWER+ ST1502SA, DEWALT 60V DCST972X1, and Greenworks 60V are the top picks. Entry-level 20V trimmers stall in tall grass beyond 6 to 8 inches.
What string trimmers are best for tall people?
Tall operators (6 feet 2 inches and up) should look for trimmers with telescoping shafts, longer overall length, and adjustable front handles. The Wugeku 40V offers tool-free telescoping adjustment. The DEWALT 60V and Greenworks 60V both have longer shafts and include shoulder straps that transfer weight from arms to torso.
How to cut tall grass with a string trimmer?
Start with a reduced cutting swath for the first pass. Sweep the tops first to knock down upper growth, then make a second pass at the base. Use a slow scything motion rather than fast chops. Bump feed line every 30 seconds to keep fresh line exposed. Clear accumulated clippings from the head every 10 to 15 minutes. For saplings and woody growth, switch to a brush cutter blade attachment instead of string line.
Are battery string trimmers good for tall grass?
Modern battery string trimmers in the 40V to 60V brushless class handle tall grass as well as small gas engines for homeowner use. The EGO, DEWALT, Greenworks, and RYOBI trimmers in this lineup all cut through 3 foot tall grass without bogging. Entry-level 20V trimmers are not powerful enough for genuinely tall grass and tend to stall in thick weeds.
What is the difference between a string trimmer and a brush cutter?
A string trimmer uses spinning nylon line to cut grass and thin weeds. A brush cutter uses metal blades (3 tooth or 40 tooth) to cut through thick weeds, saplings, and woody growth that string cannot handle. Many modern trimmers accept brush cutter blade attachments through a universal coupling, turning one tool into both. For rural property with mixed grass and brush, a trimmer with blade capability is the most versatile option.
Final Verdict – Which String Trimmer Should You Buy
After three months of testing eight string trimmers across real rural property work, the BLACK+DECKER LST300 earns our top recommendation as the best string trimmer for tall grass overall. Its combination of light weight, automatic line feed, 2-in-1 trimmer to edger conversion, and 4.4 star rating across 9,661 reviews makes it the most reliable all-around choice for the widest range of homeowners. For tall grass specifically, step up to the EGO POWER+ ST1502SA or DEWALT 60V DCST972X1 if you need brushless power and a wider cutting swath.
The best string trimmer for your property depends on three factors: yard size, grass thickness, and battery ecosystem. Small yard with weekly trimming: BLACK+DECKER LST300 or Worx WG154. Quarter acre with occasional tall grass: BLACK+DECKER LST136B or RYOBI 40V. Half acre or rural property with thick weeds: EGO POWER+ ST1502SA, DEWALT 60V, or Greenworks 60V. Mixed grass and brush with saplings: Wugeku 40V with included blades.
For more on pasture and property management beyond string trimmers, our guide to introducing horses to spring grass covers the livestock side of tall grass management. Whatever trimmer you choose from this list, pair it with the safety gear, technique, and maintenance habits covered above and it will handle tall grass for years to come.