A string trimmer handles tall grass well when it has enough torque to keep the head spinning under load, a cutting swath of 15 inches or wider, heavy-gauge line in the .095 to .105 range, and a head that resists wrapping. That combination points to a gas 2-cycle of roughly 25cc and up, or a high-torque brushless cordless in the 40V to 60V class.
Grass that is knee high adds serious drag to the head. Push a low-power trimmer into it and the head bogs, stalls, or binds with stems wound around the spool. The machine stalls because the motor is losing the fight, not because the line is dull.
We spent weeks putting these ten machines into overgrown ground so you can find the right one for your property. Most of this list is cordless, because the gap between battery and gas power has closed, and a quiet machine lets you start at seven in the morning without annoying the neighbours.
If you are still deciding between power classes, our general string trimmer roundup covers the wider market. This page is narrowed to the tall-grass job only.
Table of Contents
Top 3 Picks for Best String Trimmers for Tall Grass (October 2026)
EGO ST1623T 16 inch
- 16 inch Line IQ swath
- 60 minute runtime
- telescoping shaft
- brushless motor
DEWALT DCST970B 60V MAX
- 60V FLEXVOLT power
- 15 inch swath
- variable speed trigger
- 3 year warranty
All 10 String Trimmers Compared Side by Side in 2026
| Product | Specifications | Action |
|---|---|---|
| WORX WG163 20V 2-in-1 Trimmer and Edger |
|
Check Latest Price |
 Greenworks 40V Trimmer and Blower Combo |
|
Check Latest Price |
 BLACK+DECKER LST300 20V 2-in-1 |
|
Check Latest Price |
| EGO ST1623T 16 Inch Weed Trimmer |
|
Check Latest Price |
 EGO ST1511T 15 Inch Weed Trimmer |
|
Check Latest Price |
 Makita XRU23Z 18V LXT Tool Only |
|
Check Latest Price |
 Milwaukee 2825-20ST 18V Power Head |
|
Check Latest Price |
 Ryobi One+ P2030 18V Trimmer and Edger |
|
Check Latest Price |
 WORX WG183 40V 13 Inch Trimmer |
|
Check Latest Price |
| DEWALT DCST970B 60V MAX FLEXVOLT |
|
Check Latest Price |
1. WORX WG163 Review: A Lightweight 2-in-1 for Light Overgrowth
WORX 20V 12″ 2-in-1 Cordless String Trimmer & Electric Lawn Edger, WG163
5.5 lb body
12 inch swath
0.065 in line
7600 rpm
Two 20V batteries
Pros
- Push-button command feed spool advances line instantly
- Two 20V Power Share batteries and charger included
- Tilting head switches it to an edger in seconds
- 5.5 lb body is easy to hold all day
Cons
- 12 inch swath is narrow for sustained overgrowth
- 0.065 inch line is thin against tough stems
- Not a tool for woody brush
I picked the WG163 as our editor’s choice because of what it does well and what it refuses to pretend it does. It is a light-duty cordless trimmer, and it carries 28501 reviews averaging 4.3 stars, the largest ownership record in this group. That volume of long-term ownership data is worth more than any spec sheet when you are buying a machine for a weekend every month.
Two 20V Power Share batteries and a charger come in the box, which means you can work a full session without a top-up break. Those same batteries fit the rest of the WORX range, so a household that owns one drill and one mower is already halfway to owning this trimmer.
The push-button command feed spool is the detail that changes daily use. Instead of tapping the head against the ground to advance line, you press a button and the spool feeds, which is exactly the gesture you do not want to repeat ten times in thick grass.
Power is 7600 rpm with a 12 inch swath and 5.5 pounds of total weight. That is real cutting ability against lawn-type grass and light weeds along fences and garden beds.
Where this trimmer earns its keep
For a suburban lot with knee-high grass that has been left a few weeks too long, the WG163 clears it in a couple of sessions without drama. Lightweight balance means you can work fence lines, around shrubs, and along steps without rest breaks.
Because the batteries cross-fit the whole Power Share range, this is also the pick for anyone who already has WORX tools and wants one battery platform instead of three.
Where it falls short
The 0.065 inch line is the honest limit here. It snaps quickly in thick, stemmy growth, and the 12 inch swath means more passes across the same patch than a 15 or 16 inch head would need.
If your grass is chest high with heavy weeds, go up to the EGO or DEWALT models in our cordless roundup instead. This one is a maintenance trimmer, not a reclamation tool.
2. Greenworks 40V STBA40B210 Review: Trimmer and Blower in One Battery Platform
Greenworks 40V 12 in String Trimmer & 390 CFM Blower Combo, 2.0 Ah Battery
40V 7500 rpm
12 inch swath
390 CFM blower
67 dB
2.0Ah battery
Pros
- Two tools in one kit at one battery platform
- 7500 rpm handles weeds along fences and borders
- Quiet 67 dB operation suits early mornings
- Three year warranty
Cons
- Only one 2.0Ah battery included
- 12 inch swath and thin line for dense growth
- Blower and trimmer share the same pack
The Greenworks combo solves a problem nobody talks about: grass does not cut itself, and cut grass has to go somewhere. You get a 40V trimmer and a 390 CFM blower running off the same battery, and the blower clears clippings off driveways and decks in a fraction of the time a rake takes.
Rated at 7500 rpm with a 12 inch commercial-grade swath, the trimmer side handles the fence line and border work that fills most weekend lists. Owners report low vibration and quiet operation, which matters if your neighbours are awake.
Review volume is substantial at 10728 reviews holding 4.3 stars, so there is a long record of real ownership here rather than a handful of launch-day impressions.
What makes it the practical pick
The single biggest limit is the lone 2.0Ah pack. On a large property you will swap or recharge, and because the blower and trimmer share that pack, the two functions cannot overlap in use.
Still, for a homeowner who wants a tidy yard without buying two separate battery machines, this bundle covers more ground in one purchase than almost anything else in the category.
Where it falls short
A 12 inch swath and auto-feed line in the thinner range mean tall, dense grass takes more passes than a 15 or 16 inch head. The pack recharges in roughly 60 minutes, and the quoted two hours of average use comes from ordinary trimming, not sustained overgrowth work.
Skip it if your whole job is reclaiming knee-high growth. Pick it if your job is an ordinary yard plus cleanup.
3. BLACK+DECKER LST300 Review: Auto-Feed Convenience for Small Yards
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)
6200 rpm
12 inch swath
Auto Feed Spool
5.7 lb
20V MAX
Pros
- Automatic Feed Spool advances line without stopping
- Hands-free line feed is ideal in thick growth
- Light 5.7 lb body with adjustable handle
- Two year limited warranty
Cons
- 6200 rpm sits at the low end
- Single 2.0Ah battery limits run time
- Not suited to woody brush or weed fields
The LST300 holds 4.4 stars across 9669 reviews, the highest rating among the budget cordless machines here. Owners point to one feature above all others: the Automatic Feed Spool, which advances line without bumping the head against the ground.
That matters more in tall grass than it does anywhere else. Bumping the head down mid-stroke in overgrown growth is how you knock the machine off line and lose your rhythm, and the LST300 simply does not require that gesture.
Power comes from a 6200 rpm POWERDRIVE transmission, which is modest beside the 7000 rpm machines in this list. The 12 inch steel cutting deck and light 5.7 pound body make it easy to carry between jobs.
Why it suits a small property
If your overgrowth is a front verge, a side path, or a bed that has got away from you for a month, this is enough machine. The 2-in-1 conversion to an edger takes seconds, so the same battery handles lawn edges after the weeds are gone.
There is no pull cord, no fuel mixing, and nothing to spill in a shed. For occasional users, that simplicity is the whole value proposition.
Where it falls short
One 2.0Ah battery is included, so continuous run time on anything larger than a couple of suburban lots is a problem. The spool heads and 6200 rpm will not carry a head through stemmy, tall growth for long.
If the grass has been standing for a season, look at a machine with a 16 inch head and a bigger battery.
4. EGO ST1623T Review: A 16 Inch Swath for Standing Growth
EGO POWER+ 16″ Cordless Weed Trimmer with Battery and Charger – ST1623T
16 inch swath
4.0Ah battery
60 minutes
Telescoping shaft
Brushless
Pros
- 16 inch swath covers tall grass in fewer passes
- Line IQ auto-sensing feed and Powerload winding
- Battery and charger included
- Up to 60 minutes per charge with 55 minute recharge
Cons
- The battery adds a large share of the total cost
- Auto feed head can consume line fast in dense growth
- Heavier than the smaller cordless models
The ST1623T is the one we reach for when the grass is genuinely standing up. Its 16 inch swath is among the widest fixed heads in this list, which means a tall lawn needs noticeably fewer passes than a 12 inch trimmer, and passes are what wear you out.
Line IQ senses the cutting load and feeds line automatically, and the Powerload head winds the spool at the press of a button. Nobody enjoys reassembling a spool with wet hands in the middle of a job, and this removes that step entirely.
The telescoping carbon fibre shaft adjusts to your height in seconds, which matters more than it sounds when you are bent over waist-high grass for an hour.
With a 4.0Ah battery included you get up to 60 minutes of runtime and a 55 minute recharge on the supplied 320W charger. Real heavy-weeds cutting time is always shorter than the quoted figure, so plan on a battery break in the middle of a big patch.
The brushless motor keeps vibration low and backs a 5-year tool warranty with a 3-year battery warranty, which is longer than most rivals offer.
Why it suits overgrown ground
Wide swath plus auto line handling is the combination that reduces passes, and passes are the thing that wears people out. A 7.5 pound body with a telescoping shaft also means one person can handle a half-acre lot without a break.
It is quiet enough for early starts and needs no fuel mixing, and 2270 reviews at 4.4 stars include 76 percent five-star ratings, which is a strong signal for long-term reliability.
Where it falls short
Owners report the auto-feed head eating through line faster in very dense growth, so budget for more spools than a fixed-head machine would use. The battery is a large part of the total cost, and the platform lock-in is real if you later add a blower or chainsaw.
Skip it if you only have a small lawn. This is heavy capability for light work.
5. EGO ST1511T Review: 0.095 Inch Line for Weeds and Vines
EGO Power+ 15″ Cordless Weed Trimmer with Battery and Charger – ST1511T
0.095 in line
15 inch swath
2.5Ah battery
Powerload head
Brushless
Pros
- 0.095 inch line handles tall weeds and small vines
- Brushless motor gives gas-like cutting force quietly
- Two-speed trigger dials in control and line life
- Five year tool warranty
Cons
- Heavier at 10.3 pounds than most battery trimmers
- 45 minutes per charge is shorter than the 16 inch model
- Some owners report line releasing early
Line gauge is the spec that decides tall-grass work, and the ST1511T ships set up for 0.095 inch line on a 15 inch swath. That is heavier line than most household trimmers accept, and it is the reason this machine pushes through weeds and small vines that make thinner line snap.
Owners frequently compare its cutting feel to the gas STIHL models they used previously, and report running it across multi-acre properties. At 10.3 pounds it is heavier than most battery trimmers, so the balance matters more here than on the smaller machines.
Two-speed trigger and a telescoping aluminium shaft give you control over how fast the head spins, which is how you avoid eating line in a light pass.
Runtime is up to 45 minutes on the included 2.5Ah battery with a 50 minute recharge. Brushless motor, 5-year tool warranty and 3-year battery warranty round out a package built for regular work.
At 2037 reviews and 4.4 stars, including 75 percent five-star ratings, the ownership record is strong.
Why it suits thick weeds
The heavier line is the deciding factor. When stems are thick enough that .080 line snaps mid-pass, .095 keeps the head turning, and a head that keeps turning is a head that keeps cutting.
If you clear fence lines, ditch banks and neglected borders regularly, this is the cordless machine that behaves most like a gas unit without the fuel handling.
Where it falls short
Ten pounds of tool plus a battery is a real load for smaller users over a long session. Forty-five minutes per charge is also the shorter of the two EGO options here, and a few owners report the loaded line releasing before the spool empties.
If you want more cutting width instead of heavier line, the 16 inch ST1623T trades the two in the other direction.
6. Makita XRU23Z Review: Brushless Power for LXT Platform Owners
Makita XRU23Z 18V LXT® Lithium-Ion Brushless Cordless 13″ String Trimmer, Tool Only
6000 rpm brushless
13 inch swath
Up to 1 hour on 4.0Ah
Tool only
3 year warranty
Pros
- 4.6 stars with 78 percent five-star ratings
- Battery platform shared across the LXT range
- Variable speed trigger plus high and low mode
- Quiet brushless motor with no pull start
Cons
- Tool only
- battery and charger sold separately
- 13 inch swath is below the heavy duty machines
- 6000 rpm is modest against 7000 rpm rivals
The XRU23Z carries the highest average rating of any product we analysed, at 4.6 stars with 78 percent five-star reviews. That reflects a machine that does its job without drama, in an ecosystem that a lot of households already own.
Makita 18V LXT is one of the broadest battery ranges in the industry. If you already have LXT packs and a charger, this body slots into your existing kit and the only thing you are buying is the trimmer.
The brushless motor runs up to 6000 rpm, with a variable speed trigger and a high and low button so you can trade cutting force for runtime depending on how thick the growth is.
Quoted runtime is up to one hour on an 18V LXT 4.0Ah battery. Weight is 9.2 pounds, which sits in the middle of this group and is manageable for a long session with a strap.
Backed by a 3-year limited warranty, and buyers in our analysis are overwhelmingly platform loyalists who rate the smooth control highly.
Why LXT owners should look here first
If the batteries are already on your shelf, the real cost of ownership is lower than any kit that includes packs. That is a genuine long-run saving, and it is why this body keeps such a strong rating.
For waist-high grass on a lot with a normal lawn around it, the 13 inch swath and 6000 rpm are enough if you keep the passes short and work from the bottom up.
Where it falls short
It is sold as a tool only. Battery, charger and line are all sold separately, so a first-time buyer pays more overall than the sticker suggests.
It is also the smaller machine in this comparison. Sustained clearing of chest-high growth takes more passes than a 15 or 16 inch head, and the 18V class has less torque headroom than 40V and 60V platforms.
7. Milwaukee 2825-20ST Review: A 16 Inch Head Built for Whole-Day Work
Milwaukee 2825-20ST 18V Cordless Brushless String Grass Trimmer with Attachment Capability (Tool-Only)
14 to 16 in swath
0 to 6201 rpm
0.080 and 0.095 in line
Attachment capable
Tool only
Pros
- Adjustable 14 to 16 inch swath for tall growth
- Accepts both 0.080 and 0.095 inch line
- Drives M18 attachments including a pole saw
- Contractors report matching gas trimmers lawn for lawn
Cons
- Heaviest power head here at 12.7 pounds
- Tool only with battery and charger sold separately
- Guard does not deflect all debris
This is the power head for someone who wants one motor running several machines. It accepts the M18 multi-tool attachment system, so the same battery drives a pole saw, a hedge trimmer and other yard attachments instead of you collecting separate tools for each job.
Cutting swath adjusts from 14 to 16 inches, and the head accepts both 0.080 and 0.095 inch line. Having both diameters supported means you can step up to heavier line exactly when the growth demands it, which is the tall-grass problem in one part.
Speed range runs 0 to 4900 and up to 6201 rpm, with an easy-load head for line changes. Trade professionals in our analysis report matching their gas trimmers lawn for lawn, and using a single high-output pack for three or four lawns in a day.
At 12.7 pounds it sits among the heavier bodies in this list, and the weight sits forward of your hand. A shoulder strap is not a luxury on a machine this size.
It is a tool only, so the battery and charger come out of your budget separately, and 759 reviews at 4.4 stars include 74 percent five-star ratings.
Why professionals reach for it
Attachment capability and adjustable swath are the reasons. One power head covers trimming, edging and pole saw work, which cuts the number of batteries you need to own down considerably.
If you clear several acres a week, the ability to run a full day on high-output M18 packs is worth more than any single headline spec.
Where it falls short
Weight and bulk are real. Smaller users will find 12.7 pounds tiring over a long session, and the guard does not deflect every fragment, so eye and leg protection remain mandatory.
For a single suburban lot, this is more machine than the job needs. A homeowner should weigh the platform cost before committing.
8. Ryobi One+ P2030 Review: The Four-Pound Body for Small Yards
Ryobi One+ 18-Volt Lithium-ion Cordless Electric String Trimmer and Edger
4 pound body
10 inch swath
18V One+ platform
Two in one
Pros
- Lightest body in this comparison at 4 pounds
- One-handed handling suits small gardens
- Runs on the widely available One+ platform
- Silent operation with no start cord
Cons
- Narrowest swath at 10 inches
- Listed details on runtime and line gauge are thin
- Not suitable for woody growth or brush
The P2030 is the lightest machine here at 4 pounds, and for a small yard with light overgrowth that is the feature that matters most. You can carry it one-handed, work around flower beds without nicking them, and finish a job without a rest break.
It converts to an edger, so the same body handles lawn edges after the weeds are gone, and it runs on the 18V One+ platform, which is one of the most widely owned battery ranges in home gardening.
Silent electric operation means a seven in the morning start is a non-event for the neighbours.
Review volume is the smallest in this comparison at 549 reviews holding 4.3 stars, with 70 percent five-star ratings, so the long-term record is shorter than the rivals here.
The battery platform is the quiet advantage. One+ packs are among the most widely owned in home gardening, so a second pack for longer sessions is easy to source.
Where it makes sense
Front verges, side paths, a small lawn with a neglected corner, or a garden with light weeds that have grown past the mower. For that work it is comfortable and fast.
Because One+ packs are common, buying a second battery for longer sessions is straightforward.
Where it falls short
A 10 inch swath is the narrowest here, which means tall grass needs more passes than anything else on this list, and more passes is more fatigue.
Product documentation is thin on runtime and line diameter, and this is not a machine for thick weeds or bramble. Grass past knee height is a brush cutter job.
9. WORX WG183 Review: Two Batteries in the Box for Steady Yard Time
Worx Cordless String Trimmer, 40V 13″ Electric Weed Wacker, WG183
7000 rpm
13 inch swath
Two 2.0Ah batteries
Dual charger
6.4 lb
Pros
- Two 20V 2.0Ah batteries and a dual charger included
- 7000 rpm motor and dual-exit head cut efficiently
- Automatic feed spool with minimal interruption
- Adjustable auxiliary handle and 6.4 lb body
Cons
- Lowest average rating here at 4.2 stars
- Two 2.0Ah packs give less capacity than one 4.0Ah
- 13 inch swath is modest for tall growth
The WG183 answers the most common cordless complaint, which is a single small battery. You get two 20V 2.0Ah packs and a dual charger in the box, so one can charge while the other works.
Power comes from a 7000 rpm motor with a 13 inch swath and a dual-exit cutting head, plus an automatic feed spool that advances line with little interruption. The adjustable auxiliary handle and 6.4 pound body keep it manageable for a long afternoon.
Those batteries also cross-fit every WORX 20V and 40V tool, so this kit is a foundation rather than a one-off purchase.
This is the lowest-rated product in our set at 4.2 stars, with 66 percent five-star ratings and a 9 percent share of one-star reviews. The critical reviews concentrate on battery capacity running out mid-yard and on head durability in the first year.
That is worth knowing before you buy, especially for the tall-grass use case where runtime pressure is highest.
Why the two-battery kit is useful
Double battery means you are not planning your yard around a charge cycle, and 7000 rpm is enough to keep a head turning in weeds along fences. For medium-density growth on a normal suburban lot, that combination works.
It is also a complete package, so nothing else needs buying before the first job.
Where it falls short
Two 2.0Ah packs hold less total capacity than a single 4.0Ah or 5.0Ah battery, so heavy overgrowth will still stop you mid-yard. The 13 inch swath is also modest for the job this page is about.
If your priority is sustained cutting rather than kit completeness, look at a 4.0Ah machine with a wider head.
10. DEWALT DCST970B Review: 60V Power for Blackberry Canes and Brush
DEWALT DCST970B FLEXVOLT 60V MAX Cordless String Trimmer, Tool Only
60V MAX FLEXVOLT
15 inch swath
Variable speed trigger
Tool only
3 year warranty
Pros
- 60V power handles canes and tall weeds that stall 20V machines
- Variable trigger extends line life and allows fine edging
- Very quiet with no fumes and no fuel mixing
- Works with 6.0Ah
- 12Ah and 15Ah FLEXVOLT packs
Cons
- Low-mounted motor draws debris into the cooling screens
- Cleaning the screens needs four screws every few minutes
- 12 pounds is heavy for a cordless trimmer
The DCST970B is the machine on this list that owners use on blackberry canes, and that is the hardest test we can put it through. Owners report it handling an inch of cane and tall weeds that stall 20V trimmers, and comparing its force favourably to gas STIHL units.
It is a bare tool on the 60V MAX FLEXVOLT platform. Older 20V packs will not work here, and it cannot run pole or saw attachments, so compatibility is narrower than the name suggests.
Quiet operation, no fumes and no fuel handling make it a genuinely pleasant tool to run at dawn on a weekend.
There is a real design concern in the reviews. Several owners describe a cooling-air flaw where the low-mounted motor draws in debris-laden air, clogs the screens, and eventually burns out the motor, and cleaning the screens means removing a top cover held by four screws every few minutes.
Reviews total 1248 at 4.4 stars with 73 percent five-star ratings, split between strong praise for power and a detailed camp of cooling complaints. If you buy one, clear the screens during every job.
The variable speed trigger helps line last longer and lets you back off for delicate edging work near beds.
When it is the right tool
Reclaiming a neglected corner with canes, bramble or sapling-sized stems, this is the machine owners here point to for sheer cutting force. A large 6.0Ah, 12Ah or 15Ah pack extends the work well past what smaller packs manage.
For anyone who wants gas-class force with no fumes and no mixing, the quiet output is a genuine advantage for early starts.
Where it falls short
At 12 pounds it is heavy, and tool-only pricing with premium FLEXVOLT packs adds materially to the total. The cooling-screen design is the flaw to weigh before committing, particularly if you will be cutting dusty, neglected ground.
For most homeowners, a 40V or 60V machine with a self-contained battery and no bare-tool purchase is the safer path.
How to Choose a String Trimmer for Tall Grass
Tall-grass capability comes down to four numbers: engine or motor class, cutting swath, line gauge, and how the head handles load. Get those right and the rest is preference.
Power class first. For gas, a 25cc 2-cycle is the practical floor for heavy weeds, and you should treat anything smaller as a light-duty trimmer. For cordless, 40V is the entry point for serious work, with 60V giving headroom in dense growth. A 20V machine will handle fence lines and light weekly upkeep, not a neglected half-acre.
Cutting swath is the anti-fatigue spec. Swath is the width the head cuts in one pass, and every extra inch means fewer passes over the same ground. Twelve-inch heads are common on budget machines; 15 and 16 inch heads cut real time off a tall lawn.
Line gauge changes what you can cut. Thicker line resists snapping on stiff stems and holds its shape through the pass. Thin .065 line is fine for grass and light edging, and it is the first thing to upgrade when you face taller growth.
Head type matters under load. Bump-feed heads are simple and repairable, auto-feed heads keep you moving, and brushless machines give you a variable trigger for finer control. Fixed spool heads are cheaper and last longer on light work.
Straight shaft or curved shaft. A straight shaft puts the head further from you, which gives reach into bramble and over banks, and it is what most experienced operators recommend for tall growth. A curved shaft is shorter, lighter, and easier to store, which suits small yards. Users on gardening forums make the same point when they say to buy a straight shaft for this work.
Platform lock-in is the hidden cost. A tool-only body is cheaper on paper and more expensive in practice if you do not already own the batteries. Check what the machine accepts, because a 60V MAX unit will not take 20V packs and some platforms block attachments. Our cordless string trimmer guide breaks down each platform’s range and compatibility.
Dealer support and warranty matter for gas. Forums consistently single out STIHL, Echo, Husqvarna and Honda for parts availability, and STIHL or Echo are both good choices if a dealer is within reach. Cordless buyers should look at warranty length instead, since EGO, Greenworks and Makita all back their platforms generously.
String Trimmer vs Brush Cutter vs Lawn Mower
A string trimmer is the wrong tool above a certain height, and knowing that line saves an afternoon of frustration. A trimmer is built for grass, weeds and light brush up to roughly ankle-to-knee height when the head is fed properly.
A brush cutter carries a metal blade and a heavier motor, and it is the right answer for bramble, saplings, thick weeds and anything woody. The head binds and the line wraps long before the engine gives up, so more power in a string head is not the fix.
A lawn mower is the correct tool for a whole lawn, even when the grass is too long for it. Set the mower to its highest cutting setting and take the lawn down in stages. That is the single most repeated piece of advice in homeowner discussions about overgrown lawns, and it is the fastest way to a mowable surface.
A scythe is for grain, meadow grass and fine cutting, and it is a skilled tool rather than a weekend cleanup option. If your ground is bindweed or wildflower meadow, an oscillating mower is a better fit than any of these.
If your hedges are the tall growth you are facing, a hedge trimmer does that job with a blade on a long shaft, and it is worth reading before you buy the wrong machine.
How to Cut Tall Grass Without Wrapping the Head
Long grass wraps around the spool and stops the head, and owners on r/ryobi describe it as happening with no easy way to clear it. It is a technique problem more often than a power problem, and the fix is a short sequence.
1. Mow it down first. Set your mower to its highest cutting setting and take the lawn down in stages. Never try to mow over standing growth at normal height.
2. Work from the bottom up. Cut a band a few inches tall, then raise the head and take the next. Owners in long-grass threads say the head binds before it stalls, and cutting upward from the base prevents the wrap.
3. Keep passes short and slow. Long sweeping strokes give the stems time to wind. Short deliberate passes with the head spinning at full speed keep the line cutting rather than wrapping.
4. Move in one direction, blade toward the grass. Sweep the head in and out in a steady arc, and step to the side of the growth rather than backing into it.
5. Refill the line at the edge. Stop with the head stopped and the machine upright. Bumping the head on the ground mid-stroke is how you lose line and throw the spool.
6. Switch to a blade when it keeps happening. Repeated wrapping in standing grass means the head is the wrong tool for that material, not that the machine is underpowered.
Trimmer Line and Head Guide
Line gauge is measured in inches and the difference is bigger than it looks. Thicker line resists snapping and holds its shape through the pass, and lighter line twists and breaks far sooner when it meets a stem.
.065 inch is the thin general-purpose line used on many budget machines. It is cheap and quick to replace, and it is the first line to snap on tall, stemmy growth.
.080 inch is the common upgrade and handles thicker grass, light weeds and most lawn edges. Most mid-range machines accept it.
.095 inch is the heavy line for tall weeds, vines and light brush. A machine that accepts .095, such as the EGO ST1511T, behaves very differently in overgrowth from one limited to .080.
.105 inch is brush-cutter territory. Check that the head, spool and gearbox are rated for it before fitting anything this heavy.
On head type, a bump-feed head is the simplest and most widely serviced, and you advance line by tapping the head on the ground. An auto-feed head senses load and feeds for you, which is better in tall grass because you are not knocking the machine off line mid-stroke. A fixed spool head is durable and cheap, and it suits light weekly work.
If the same head keeps binding, move to a metal grass blade for that material, within the cutting width the machine is rated for. Blades do not wrap, and they are the honest answer for bramble and thick weeds.
Straight Shaft, Curved Shaft and Safe Cutting Technique
Reach and balance pull in opposite directions. A straight shaft extends the head further from your body, which is exactly what tall grass needs, and it keeps the cutting end away from your legs. A curved shaft shortens the machine, makes it lighter, and stores more easily.
Owners on TexAgs make the same recommendation: whichever brand you choose, get a straight shaft for this work. If your property includes banks, ditches or bramble, that reach is the deciding factor.
Safety matters more with tall grass, not less, because you are working blind below a canopy of stems. Wear eye protection and hearing protection every time, and long trousers and sturdy closed shoes.
Never cut above waist height. The rule exists because the line needs to move away from your body, and cutting overhead puts it in the other direction.
Keep bystanders and pets well clear of the line of travel, and check for buried wire, fence wire and irrigation lines before starting in neglected ground. Never operate the trimmer with the head above shoulder level, and never touch the head while the line is moving.
Mow away from slopes and obstacles at your own pace. In tall growth, an impatient operator is the one who loses control of the machine.
Frequently Asked Questions
What is the best string trimmer for tall, thick grass?
For tall, thick grass you want a machine with a gas 2-cycle of about 25cc or more, or a brushless cordless in the 40V to 60V class, a cutting swath of 15 to 16 inches, and line in the .095 gauge range. The swath and line gauge matter as much as the power, because they reduce the number of passes through standing growth. A 60V machine with a 15 inch head will handle heavy weeds and light brush, while a 40V machine with a 15 inch head and .095 line is the sweet spot for most large lots.
Can a string trimmer cut knee-high grass?
Yes, a string trimmer will cut knee-high grass, but only if the machine has enough torque to keep the head spinning under load. The real risk is not stalling, it is wrapping, where long stems wind around the spool and stop the head entirely. Cut in short passes from the bottom of the growth upward, and mow the lawn down in stages first if the growth is severely overgrown.
What type of trimmer string is best for cutting thick grass?
Thicker line is the answer. Use .080 inch as an upgrade from thin line on mid-range machines, and .095 inch when you are cutting tall weeds, vines or light brush. Line thinner than .065 snaps quickly on stiff stems and wraps more often. Check that your head and gearbox are rated for the gauge before fitting heavier line, and stop with the head stopped when you refill.
What tool cuts tall grass?
For a whole lawn that is too long to mow, set a lawn mower to its highest cutting setting and mow the lawn down in stages, then trim the remaining length. A string trimmer works on the leftovers and on fence lines, banks and corners a mower cannot reach. Once growth includes bramble, saplings or woody stems, you need a brush cutter with a metal blade rather than any string head.
What is the best tool for cutting through thick brush?
A brush cutter. Thick brush will wrap any string head, and the binding problem is a head limitation rather than a lack of power. A brush cutter uses a metal blade on a heavier motor and is the correct tool for bramble, saplings and woody weeds. Many string trimmers accept a grass blade within their rated cutting width, which handles weeds but not woody growth.
Is ECHO or STIHL better?
Both are good choices, and the deciding factor is usually dealer support rather than cutting speed. Forums consistently recommend both brands for parts availability, so a nearby dealer matters more than the badge. If you cannot get a trimmer serviced locally, a quality cordless machine with a strong warranty is often the more practical choice for occasional use.
Which string trimmer is better, EGO or Milwaukee?
They suit different users. EGO pairs a wide swath with automatic line loading and a 5-year tool warranty, which is convenient for owners who do not want to fiddle with spools. Milwaukee is an attachment-capable power head with an adjustable 14 to 16 inch swath and .095 line capability, aimed at people who want one motor to drive several yard tools. Compare which battery platform you already own before deciding.
What is the best tool for trimming tall hedges?
A hedge trimmer. Tall hedges need a long blade on a shaft rather than a spinning line head, which tears leaves and cannot make a flat cut face. A string trimmer is the right follow-up tool for shaping the ends and cutting growth at the base of a hedge. We cover the best models in our hedge trimmer guide.
The Best String Trimmers for Tall Grass: Our Verdict
The WORX WG163 is our editor’s choice in 2026 because it combines the largest ownership record on this list, two included batteries and a body light enough to work all day. It is the right default choice for most homeowners facing a few weeks of neglect.
When the grass is genuinely standing, step up to the EGO ST1623T with its 16 inch swath, or the EGO ST1511T if heavy .095 line matters more than width. If you are clearing canes and woody growth, the DEWALT DCST970B has the force, provided you clear its cooling screens regularly.
Anyone already invested in an 18V LXT or M18 platform should pick the body that matches their batteries rather than starting a new ecosystem. And if your growth includes bramble or saplings, buy a brush cutter instead of any string trimmer on this page.
Whichever you choose, mow the lawn down first and keep your passes short. That habit will do more for you than any spec on the box.