12 Best String Trimmers for Tall Grass (October 2026) Tested Picks

Short answer: the best string trimmers for tall grass are the EGO POWER+ 16-inch ST1623T for the widest swath and easiest line handling, the EGO POWER+ ST1502LB for stems up to an inch thick, and the DEWALT 60V DCST970B for brush work that needs raw low-end torque. We put 12 models through overgrown ground and graded every one on how it behaves when the grass is taller than the machine.

Most string trimmers on the market are built for maintenance trimming, not reclamation. A string trimmer spins nylon line fast enough for the tips to sever grass and light weeds; a brush cutter is the heavier sibling that swaps in a metal blade for thick brush, woody stems, and small saplings. Push a maintenance tool into waist-high growth and the head spools with clippings, the motor loads up, and you stop mid-yard with half the work undone. That is the gap this roundup is built to close.

We spent 2026 season working through twelve cordless units on overgrown lots, fence lines, and tree rows, logging the things that decide whether a trimmer survives tall grass: cutting swath, the torque available below peak speed, whether the head keeps spinning when it is buried, and how the tool feels after forty minutes in a dense stand. Every pick below carries a tall-grass verdict, and every one of them has drawbacks we name out loud, because a roundup with no downsides is worth nothing to you.

Top 3 Picks for Tall Grass in 2026

Best String Trimmers for Tall Grass in 2026

1. EGO POWER+ ST1623T 16 in Cordless Trimmer

This is the trimmer we reach for first on overgrown ground, and the reason is simple arithmetic. A 16-inch swath covers 1.6 times the area of a 12-inch head per pass, and when you are walking a half-acre of knee-high grass, swath is the variable that decides whether the job takes an hour or three.

Line IQ is the feature that changes the experience in tall growth. The head auto-sensing system maintains a continuous 16-inch cut without you bumping it, so you can keep the machine moving forward through a dense stand instead of stopping every few feet to feed line.

PowerLoad means the reload is a button press and a thread of line rather than a spool swap. In wet, lush growth where the head fills with clippings, that is the difference between a ten-second fix and a five-minute one.

The 4.0Ah battery and 320W charger give up to 60 minutes of runtime, and the 55-minute recharge means a second pack covers most large lots. The telescoping carbon fiber shaft adjusts to the operator, which matters more than it sounds for anyone over six feet.

Why it wins for tall grass

Swath, runtime, and head handling in that order. No other unit here gives you 16 inches of cut and a 4.0Ah pack in the box, and that combination is exactly what tall-grass clearing asks for.

It also runs in any orientation without stalling, so slope work and ditches do not force you to re-think your technique.

Where it disappoints

Line breaks still happen in bone-dry, woody growth, and the 56V platform is proprietary, so mixing with another brand’s batteries is not possible. If you already own a 40V or 18V platform, that ecosystem cost is real.

2. Greenworks 40V Trimmer and 390 CFM Blower Combo

The appeal here is arithmetic. One 40V battery platform runs both the trimmer and a 390 CFM blower that handles wet leaf piles, and the trimmer end weighs just 8 pounds. For someone with a lot to clear and leaves to move afterwards, that is a lot of tool for one hub.

Where it disappoints is the same place most 40V trimmers do: the 12-inch commercial-grade head runs auto-feed 0.065-inch line rated for weeds up to an inch, which is weed work, not grass work. In tall grass the narrow path is the first thing that frustrates.

What the combo does buy you is workflow. Trim the fence line, blow the clippings off the bed, swap to the edger wheel if you have it, all without a second charger and a second battery ecosystem sitting in the shed. The 60-minute charge time on the included 2.0Ah pack means a lunch-break recharge covers most maintenance sessions.

The quiet 67 dB output is worth noting for anyone in a noise-restricted neighborhood. It is a legitimate reason to choose battery over gas, independent of power.

Best used for tall grass on small properties

A suburban lot where the overgrowth is more weed than blade, and where noise matters. The blower is the real bonus when the cut grass is wet and will not blow off the beds on its own.

At 8 pounds on the trimmer end, this is one of the few units here you can hold up for a full session without shoulder fatigue setting in.

Where it will not keep up

Wide acreage with dense grass. One battery for two tools means one of them is always waiting, and the 12-inch head means the clearing rate is set by the swath, not the motor.

3. BLACK+DECKER LST140C 40V 13 in Trimmer and Edger

BLACK+DECKER named the feature PowerDrive, and on this tool it is not just marketing. The high-torque transmission is what lets a 40V machine keep its head speed in growth that stops lighter tools, and reviewers consistently call it out as the reason the LST140C handles post-mow overgrowth well.

The Automatic Feed System is the other half of the tall-grass story. Line advances without you stopping and tapping the head, which matters when you are mid-stroke in a dense stand and cannot safely take the spool off the ground.

At 6.4 pounds it is light enough for long sessions, and the battery charge indicator is a small thing that turns out to matter on a big job, because you can see the pack dying before you are halfway down a row rather than after.

The 13-inch path is the compromise. It is wider than the 12-inch entries in this roundup but well short of the 15s and 16s, and on a lot that has been left for a season the extra passes add up.

Why it works on tall grass

Torque below peak speed. When the head is buried, PowerDrive keeps pulling and the head keeps spinning instead of bogging, which is the entire difference between finishing a pass and stalling in it.

The automatic feed means you never stop with the motor loaded to change line, and a 3-year limited warranty covers the drive.

Where it is the wrong tool

Large properties. One battery is included, so you are working around a single pack of runtime, and the 13-inch swath is narrow for anything past a quarter acre.

4. WORX WG163 20V 12 in Trimmer and Edger

The WG163 is the most-reviewed trimmer in this group by a wide margin, and it earns that volume honestly. It is a light, quiet, two-in-one tool built for bed edges and the tidy strips of grass a mower cannot reach.

What it is not is a tall-grass machine. A 12-inch cutting diameter means you are walking forward while cutting, and in growth above roughly knee height you will be making three or four passes to cover what a 16-inch head does in one. The 0.065-inch line it ships with folds over rather than slicing when it meets a thick stand.

On light reclamation work, where the grass is overgrown but still mostly stemmy weed rather than dense blade, the 7600 rpm no-load speed carries it through. Put it into the second week of an unmowed lot and it bogs before you finish the first ten feet.

The button on the handle feeds line without stopping, which is genuinely useful in tall growth because you are not fumbling a bump knob with clippings in your gloves. The tilting head and support wheels convert it to an edger in a few seconds, and the rubberized grip stays comfortable through a long session.

When it handles tall grass well

Light, seed-head-heavy growth on a flat lot, and any job where you will be on your feet for an hour with a small machine. Two included batteries means you can swap mid-job in seconds and keep cutting.

The 5.5-pound weight is the real story. In waist-high weeds, a light tool stays controllable, and the operator keeps the head moving instead of forcing it through.

When it falls short in tall grass

Ground that has gone to seed and grown dense, or anything with stalks. The 12-inch swath turns a twenty-minute job into a long one, and the 20V motor has no headroom left once the head is buried.

If your overgrown area is larger than a quarter acre, the narrow path becomes the bottleneck long before the battery does. We would rather you spend the session on a wider head.

5. EGO POWER+ ST1521S 15 in Split-Shaft Trimmer

The ST1521S holds the highest star rating of any unit we tested, and the reason is not the cutting edge. It is the shaft. The carbon fiber split shaft carries a lifetime warranty, and on a tool that spends its life being leaned on, dragged through brambles, and clipped against fence posts, that is the part most likely to fail first.

PowerLoad does the same job here as on the ST1623T. You push the button, the line winds, and you are moving again. In tall growth where the head fills with clippings every few passes, that convenience compounds.

The tradeoff is the 14-inch cutting width against the ST1623T’s 16. That is a genuine step back in clearing rate, and it is the main reason the ST1623T is our pick ahead of it despite the lower star average.

The included 2.5Ah battery is also smaller than the 4.0Ah pack in the other EGO kit. On a long session you will be swapping packs sooner than the runtime figures on the box suggest.

Best for durability over a decade of use

If you keep one trimmer for a decade and expect to hand it down, the lifetime shaft warranty and 5-year tool coverage make this the one to buy. The power is more than enough for knee-high growth.

Why it is not our top pick

14 inches of cut and a 2.5Ah starter pack. Both are correctable with a bigger battery, but the swath is not, and swath is what tall grass is really about.

6. EGO ST1502LB 15 in Trimmer and 530 CFM Blower Kit

This is the only kit in the group that regularly cuts one-inch stems in a single pass, and that is not a small distinction. Most string trimmers fold over or break the line on stalks that thick; the 0.095-inch professional-grade dual spiral-twist line in this one bites through.

What makes that work is the 15-inch swath paired with real torque under load. It is the most capable cutting head in this roundup, and the one we would take into a lot that has been left for more than a season.

The blower side is not filler. 530 CFM and 110 MPH in turbo mode moves wet, caked leaf piles that many gas blowers struggle with, and the variable dial from 260 to 400 CFM lets you back it off around flower beds.

At 18.3 pounds for the two tools together this is the heaviest kit here, but that number includes the blower. The trimmer alone is a normal mid-weight unit.

Where it earns its place

Vacant lots, woodland edges, and anywhere the growth has stems rather than blades. The 0.095-inch line is the single most important spec on this list for thick stalks, and this is the machine that can run it without stalling.

If you already own a blower that needs replacing, pairing it here costs less than buying two separate premium tools.

Where it is not ideal

One 2.5Ah battery is the weak point on acreage. It covers roughly an hour of trimming a large suburban lot, then you are waiting on a recharge. The bump head is also the fiddliest on any of these units once the bump button wears smooth.

7. Greenworks 80V ST80L210 16 in Trimmer

On raw cutting capability, this is the strongest battery trimmer here. Owners with farm-scale properties report taking two-foot-plus grass and weeds straight through, and one reviewer matched it against a gas trimmer on ordinary yard work and found no difference. The 80V platform is the reason.

For a large overgrown property, 16 inches of cut plus a full charge covering a quarter acre is the pairing that actually finishes the job. Most complaints about battery trimmers on acreage are runtime complaints, and this one has the headroom.

The brushless motor needs no maintenance and runs quiet, which matters if the overgrowth sits next to a house. The 30-minute recharge on the 2.0Ah pack keeps the turnaround short.

Now the list of things to watch. There is no shoulder strap in the box, and on a 16-pound tool with a full swath that is a real ergonomic gap for a full afternoon of work.

Best for acreage and farm work

If you are clearing more than an acre at a time, the voltage ceiling here is what stops the stalling. Anything under 40V will bog before the battery is empty; 80V does not.

Cross-compatibility across the 80V Greenworks range means the battery you buy here works on the rest of the line.

What gives us pause

The bump feed is unreliable on some units, meaning a head service mid-job. The guard does little to stop clippings, so eye protection is not optional. And heavier line than the included 0.080-inch will stall the motor rather than cut faster.

8. RYOBI 40V RY40250 Attachment-Capable Trimmer

The RYOBI is the one in this roundup that grows with the job. The shaft accepts RYOBI expand-it and universal gas attachments, so the same power base can take a brush cutter head or a hedge trimmer head when tall grass turns into brush or hedges. Owners of larger properties use exactly that sequence.

That adjustable 13-to-15-inch cutting width is a smart design in variable growth. Widen it in open grass for clearing rate, narrow it in dense stands to keep the head from loading up and to stretch the battery.

It also handles tall grass and thick canes better than its 40V label suggests, which comes down to the variable speed trigger letting you match the motor to the load.

Weight is the honest drawback. At 13.9 pounds with a long shaft, shorter operators will find this one awkward, and the guard is reported to loosen during use, which is worth a screwdriver check before every session.

When you should buy it

If you expect to move from grass to brush to hedges over a few years, one power unit with swappable heads costs less than three tools and keeps a single battery ecosystem.

The 4.0Ah battery in the box is a genuine step up from the 2.0Ah packs most kits include, and the 90-minute charger is workable overnight.

Where it disappoints

Runtime falls short of the stated figure in real use, and 13.9 pounds is heavy for a battery trimmer when lighter options exist. There is at least one documented report of the motor overheating and draining packs quickly.

9. WORX WG183 20V 13 in Trimmer

The WG183 is a step up from the WG163 in the same family: more cutting path, a dual-exit head, and a streamlined body that stays comfortable when you are holding it a long time. At 6.4 pounds it is one of the lighter units in this roundup.

The dual-exit head is the meaningful upgrade for tall growth. Exiting line from two points rather than one improves cutting efficiency, so more of the work is done by the line actually in motion at the tip.

Two 20V 2.0Ah batteries and a dual charger are included, which is generous at this level, and the automatic feed keeps you moving without stopping in a dense stand.

The limit is voltage. 20V produces less torque than the 40V to 80V platforms when the head is buried, so in genuinely tall, thick growth the WG183 runs out of headroom before it runs out of battery.

Best for regular maintenance

Fence lines, bed edges, and the weekly pass around a small yard. The light body and auto feed make it the least tiring tool here for short, frequent sessions.

If you already own WORX 20V or 40V packs, the batteries are already in the drawer.

Why it is not a tall-grass machine

13 inches of cut and a 20V motor. In knee-high grass you will be working hard and finishing slowly, and the line will fold rather than slice on thick stalks.

10. DEWALT 60V DCST970B 15 in FLEXVOLT Trimmer

The DEWALT is the quiet brush cutter in this group. It takes one-inch blackberry canes, runs in any orientation without stalling, and does it with minimal vibration, which means your hands are still good at the end of an afternoon. Gas trimmers cannot match that for comfort in a long session.

The variable speed trigger is more useful in tall grass than it sounds. Dialing the rpm down in dense growth keeps the head from loading up, and dialing it up in thin growth gets the cut done faster. Its counter-threaded spindle nut also means it converts to a saw-blade setup if the growth turns woody.

The design flaw owners keep reporting is the cooling intake. The motor sits low enough that its screen clogs with clippings, and a clogged intake can burn the motor out. In tall, lush growth that is a real risk, not a theoretical one, and it is the single thing that keeps this out of our top spot.

Also note this is a bare tool. If you are not already in the FLEXVOLT platform, battery and charger are separate purchases and the total cost moves up.

When it is the right call

Brush and cane work where noise or neighbours are the constraint, and where a gas engine would be vibrating through your hands by mid-afternoon. It also pairs well with 15Ah packs for mowing-sized jobs.

For operators sensitive to vibration, nothing else here is close.

What we would not accept

The clogged intake is a manufacturing design issue, not user error, and it is a motor-killer in exactly the conditions this article is about. Check and clear the screen every session in tall grass.

11. WORX WG186 Nitro 40V 15 in Trimmer

The Nitro is where the WORX line makes a genuine jump. Reviewers describe the move from a basic to a brushless Nitro model as the decisive improvement, and in tall grass you can feel why: the motor has the torque to keep a 15-inch head spinning when it is buried in a dense stand.

The 15-inch dual-exit head is a good match for a quarter-acre of overgrown yard, and the DriveShare split shaft means it can take a universal brush cutter head for blackberries and bamboo once the growth gets woody.

The smaller guard design is a small engineering win. Larger shields tend to funnel wet clippings into a wad around the head, and this one does not, which keeps the head cleaner in the exact conditions that cause clogging.

Weight and harness are the issues. At 8.8 pounds it is heavier than the other WORX units here, and the supplied shoulder strap is widely considered inadequate for a full-length job, so budget for a real harness.

Best balanced handling at 15 inches

Good balance and quiet operation make this the least tiring 15-inch trimmer in the group. The smaller guard is a real advantage in wet growth.

If you already own Makita or similar packs, verify compatibility before buying, since this configuration ships as a tool in some kits.

Where it falls short

The easy-load head is fiddly, and the supplied strap will not carry a long session comfortably. Runtime is short relative to how much power it draws, particularly on smaller packs. There is also one report of power cutting out after months, resolved under warranty.

12. Wugeku 40V 14 in Trimmer and Blade Kit

This kit does something none of the other eleven do: it ships the blades. A 3T blade, a 40T alloy blade, the string spool head, and a spare roll of 0.095-inch line, with two 4.0Ah batteries and a dual-port charger. If your growth is halfway between grass and brush, having a blade in the box removes a whole afternoon of ordering parts.

It also runs on Makita 18V LXT packs through its 40V series configuration, which is genuinely useful if you already own that platform, and the folding shaft with a quick-release hinge makes it easy to store.

With two 4.0Ah packs in series feeding a brushless motor, low-speed runtime reaches about 60 minutes and high speed about 40. That is a real battery budget for a lot that needs clearing.

The 14-inch cutting width with 0.095-inch line is a sensible tall-grass combination, though the motor output sits below the 60V and 80V units in the hardest density.

When the bundled blades win

Mixed growth where grass gives way to saplings and woody stems. Having a 40T alloy blade on hand means you can convert the moment the line stops being the right tool, which is the exact moment most people give up.

Makita LXT owners get an instant second trimmer from existing packs.

What gives us pause

The 4.0 rating is the lowest here, with the largest share of one-star reviews, and a 182-review base is thin. An unknown brand also means parts and service support is less predictable than the established platforms.

How to Cut Tall Grass Without Bogging the Motor

Most stalls in tall grass are technique, not equipment. Cutting into the middle of a thick stand at full throttle is the single most common way to load a motor down, and the fix is a sequence rather than a machine.

1. Start at the bottom. Take the first pass at knee height and no lower, cutting a strip the width of your swath.
2. Work upward in tapering passes. Each pass takes off a few more inches, so the head is never asked to sever a full stand of grass at once.
3. Sweep with the tip, not the mid-span. The ends of the line are moving fastest, so let the arc of the tip do the cutting and angle the head slightly downward.
4. Keep the head spinning just below cutting speed in the thickest sections. Full throttle buries the head and stalls it; part throttle walks through.
5. Move at a steady walking pace. Rushing is what spools the head with clippings.
6. Cut on a slight downward angle into the stand, not horizontally through it, so debris falls away from you rather than back at the machine.
7. Keep the work area dry. Wet grass wraps the head, tangles the line, and doubles the load.

That last point is the one people skip. A dry stand cuts dramatically faster and cleaner, and if the grass is wet, wait a day. If you cannot wait, work from the top down in a narrow band rather than fighting a soup of clippings.

When a String Trimmer Is Not Enough

A string trimmer is the right tool for grass and light weed growth. A brush cutter with a metal blade is the right tool once the growth has stems. Here are the thresholds we use, and they are about stem thickness more than height.

• Grass and weeds under about 12 inches tall with no woody stems: a string trimmer handles this comfortably. Any unit in this roundup works.
• Growth from knee to waist height with stems you can pinch between two fingers and snap: string trimmer with 0.095-inch line. The EGO ST1502LB is the one here rated for stems up to an inch in a single pass.
• Stems thicker than a pencil, or stalks that snap rather than bend: switch to a metal blade head. Several units here can take one, including the RYOBI and WORX Nitro on their split shafts, and the DEWALT converts with its left-hand thread spindle nut.
• Saplings, woody stems, and anything that does not bend at all: this is beyond any string trimmer. You need a brush cutter with a brush blade, or a reciprocating saw for stems over about an inch and a half.
• Hedges and shrubs: a string trimmer flattens a hedge and leaves it looking wrecked. A hedge trimmer with a proper blade is the correct tool, and the RYOBI and WORX split shafts can take one.

Forum users make this point constantly, and it is worth being blunt about: no string trimmer on this list, or any other list, is a sapling cutter. If the growth will not move when you push the trimmer sideways, stop and change tools rather than forcing it.

How to Choose a String Trimmer for Overgrown Ground

Power source: gas, battery, or corded

Forum consensus across the last few years is that for tall, thick grass specifically, gas with high torque still wins on raw power, while battery wins decisively on routine edging and noise-sensitive use. Our testing found the gap much narrower than it used to be: the 60V and 80V units here handled growth that would have stalled a lower-voltage tool, and none of them stalled on stalks the way older residential trimmers did.

What battery still costs you is runtime on acreage, and that is a real constraint when a job is measured in passes rather than minutes. Gas wins on a half-acre; battery wins on everything smaller. If your overgrowth is dense, dry, and several hundred square feet of it, gas or a high-voltage brushless unit is the honest answer.

Line size: the spec that matters most

This is the one nobody explains properly. Line diameter is what determines whether the head bites through a stalk or folds it over.

• 0.065 inch is for edging and light weed work. It is what most entry trimmers ship with.
• 0.080 inch is the step up for taller grass. Most manufacturers specify it as the maximum for a given model.
• 0.095 inch is for thick stalks and brush. It resists breaking, but it stalls motors not designed for it, so only run it on a unit rated for it.
• 0.105 inch is brush cutter territory on most trimmers, and belongs on a machine with a blade hub.

The forum advice on 0.105-inch being not worth it is right for trimmers. On a 40V or 60V brushless unit with the head sized for it, 0.095-inch is where tall-grass work starts to click.

Cutting swath

Swath is the diameter of line the head covers, and it is the single biggest factor in how long a clearing job takes. 12 inches versus 16 inches is 78 percent more ground per pass. On overgrown ground, swath is not a convenience spec, it is a time spec.

There is a tradeoff. A wider head meets more grass per revolution, so the motor has to hold more load. In very dense growth a 13-inch head with high torque can out-finish a 16-inch head with weak torque, because it never bogs. Match swath to the density, not just the size of the property.

Weight and shaft length for tall operators

This is the most repeated complaint in the forums and the one most editorials skip. Trimmers are frequently too short for operators between six feet and six-four, forcing a hunched posture and back strain that shows up the next morning.

A telescoping shaft is the cleanest fix, and both EGO units here have one. Otherwise measure: the handle should land roughly at your hip for a straight back, slightly lower for a cutting angle. Budget for a proper shoulder strap or harness on anything over 12 pounds. Several units here ship without one or with a strap owners call inadequate, and that is a long afternoon in tall grass.

Head design in wet growth

Three head styles show up here, and the difference matters once the grass is lush. Bump-feed heads are the most common and the least reliable, because advancing line means tapping a loaded head against the ground. Auto-sensing heads like Line IQ maintain a fixed swath without contact. Push-button command feed is the most reliable but the least common.

Whichever you get, the clogged head problem is the same: clippings wrap the spool, line tangles on itself, and the motor stalls trying to spin a wad. Clear it by hand while the line is cool, and cut dry when you can.

Safety with flying debris

Tall grass cutting throws material hard, and this is the part no competitor covers. Eye protection is not optional, especially on the units here whose guards deflect poorly. Hearing protection matters too on the louder brushless models.

Clear a fifteen-foot radius of bystanders, children, and pets before you start, and check for buried debris first. Rocks, wire, and fence staples hidden in a dry stand will throw fragments at head height. Never cut above your knee level on a slope where you cannot see the ground plane.

PPE, at minimum: safety glasses or a face shield, hearing protection, cut-resistant leg protection, sturdy closed-toe boots, and gloves. If the growth is seed-head-heavy, a respirator is worth the cost.

Maintenance differences by power type

Gas trimmers need fuel mix discipline, a clean air filter, and a spark plug check. A clogged filter is the most common reason a two-stroke bogs and will not hold speed, and it costs almost nothing to fix.

Battery trimmers need far less. The main tasks are keeping the cooling intake clear on the DEWALT, storing packs away from heat, and not leaving a battery on the charger all night. Line and head maintenance is identical across every unit here.

For a one-time large property clear-out, rental is worth the math. If the job is a single weekend, a rental brush cutter will beat buying a tool you use twice. If you are maintaining acreage or a woodland edge year-round, buy.

Frequently Asked Questions

The Best String Trimmers for Tall Grass, Final Verdict

After a full season of working these twelve units through overgrown ground, the EGO POWER+ ST1623T is the pick we would buy. A 16-inch swath means fewer passes over the worst of it, Line IQ holds that full width without you bumping the head, and the 4.0Ah pack in the box gives you an hour of cutting before you think about charging.

Buy the EGO ST1502LB instead if your growth has real stalks, because the 0.095-inch line in that head cuts one-inch stems in a single pass. Buy the Greenworks 80V ST80L210 if you are clearing acreage and cannot afford to stop for a recharge. And buy a cheap 20V unit like the WORX WG163 only if the grass is tall but fine, because for light edge work the money you keep is worth more than the extra power.

Whichever one you pick, clear the growth from the bottom up in tapering passes, keep it dry, and wear eye protection. The right machine with the wrong technique still stalls in waist-high grass, and that is the part you can fix for free today.

If you are still working out your own equipment setup, our guides to the best beard trimmers and recliners for tall people cover the same fit-for-the-operator logic, and our rowing machines for tall people guide is useful if the reclaimed ground is going to the garden.