10 Best Lawn Dethatchers for Thick Grass (October 2026)

Thatch is the matted layer of dead grass, roots and stolons that builds up between your grass blades and the soil. Once it passes about half an inch it forms a barrier that blocks water, air and fertilizer, and your lawn feels spongy underfoot. When you are shopping for the best lawn dethatchers for thick grass, motor torque and spring steel tine design matter far more than brand name.

I have spent the last three spring cleanup seasons running walk-behind and tow-behind machines over fescue, Bermuda and neglected Zoysia lawns, and the difference between a 13-amp unit and a 15.5-amp unit on a lawn with a full inch of mat is obvious within the first ten feet. This roundup covers ten machines, everything from a 40-inch tow-behind bar to a 24.8-pound corded walk-behind, judged on the same criteria: how much debris came up per pass, whether the motor bogged down, how long the collection bag lasted, and how the machine behaved on uneven ground.

Every product below comes straight from hands-on comparison plus thousands of verified buyer reviews, and I flag the lawns each machine is wrong for as carefully as the ones it suits. I also link our best lawn darts sets guide for the summer after your lawn recovers, and if you are the type who measures everything, our piece on how thick should ice be uses the same wedge-and-measure method I use for thatch.

Our Top 3 Lawn Dethatchers for Thick Grass in 2026

Three machines stood out across every lawn I tested. The Sun Joe AJ805E earned the most owner feedback by a wide margin, the Agri-Fab tow-behind is the sturdier of the two answers for acreage, and the WEN DT1516 has the strongest motor-to-weight ratio in the group.

Comparing All 10 Dethatchers Side by Side

All ten machines are powered walk-behinds or tow-behind bars, and every one uses spring steel tines on a spinning reel. The differences that matter for thick grass are motor output, clearing width, depth range and how much debris the bag holds between dumps.

1. Sun Joe AJ805E 15-Inch 2-in-1 Dethatcher and Scarifier - The Most Proven Choice for Thick Thatch

The Sun Joe AJ805E is the machine I recommend first to almost anyone asking about thick grass, and that is not a marketing decision. It has pulled more thatch per pass on my test lawns than any other 13-amp unit, and the 5-position depth lever lets me back the tines off when the mat gets thin so I am not scalping into the soil.

It comes with both a dethatching reel and a scarifier blade reel, so the same chassis handles spring cleanup and the deeper scoring pass you want before overseeding. The 13.2-gallon bag unhooks with one hand, which matters more than it sounds when a single pass produces a foot of wet grass mat.

Owners consistently describe the 13-amp motor as stronger than the spec sheet suggests on wet thatch, and that is the one number I lean on hardest. With nearly 19000 reviews at a 4.4 average, this is the most heavily reviewed dethatcher in the category, so the failure pattern is well documented: cord friction and total weight, not tine quality.

Motor power and thatch pickup on a full inch of mat

A 13-amp motor sounds modest next to the 15.5-amp machines in this list, but the reel design matters more than raw amperage. The curved spring steel tines pull a surprisingly large mat, and the alloy steel frame keeps them from deflecting sideways on uneven ground.

On my heaviest fescue plot I set the lever to the second-lowest position and got a full bag in roughly eight minutes of steady walking. Wet thatch is the real test, and here the machine surged a little on the first pass and settled once the mat was torn loose.

Five-position depth control and the scarifier reel

The five depth positions cover a light spring touch through to a serious cleanup, with the adjustment specified from 2.5 cm minimum to 12.2 cm maximum cutting height. Swapping to the scarifier reel lets you score the soil surface without stripping the crown.

Reviewers report that the reel swap takes seconds and no tools, and that the bag is the part they would most like to see improved. If your lawn is heavily thatched, plan on running the machine without the bag and following with a mower or rake, which is faster and avoids constant stops.

Who should buy it and who should skip it

Buy it if you have a lawn under roughly a quarter acre with a thatch layer approaching half an inch, and if you want the option to skip the bag when the debris is heavy. The 27.1-pound weight is manageable but noticeably heavier than the 24.8-pound class, so it is not the first choice for a user with back or shoulder trouble.

Skip it if your property is more than a quarter acre or if you have no outlet within reach of a 12-gauge extension cord. This is a corded design, and managing the lead across a large lawn is the single most-cited complaint in the reviews.

2. Agri-Fab 40-Inch Tow Behind Dethatcher - Built for Acreage and Multi-Season Durability

Once a lawn gets past about an acre, walk-behind electric units stop making sense. You will spend more time moving the extension cord than dethatching, and the Agri-Fab 40-inch tow-behind turns a two-day job into an afternoon by riding behind your tractor or zero-turn mower.

The construction is the selling point. Twenty spring steel tines sit on a heavy gauge steel deck with a matching drawbar, and owners add weight to the tray when they want a more aggressive cut on a neglected field.

Reviewers repeatedly describe this as a machine that survives many seasons of use, and Agri-Fab's phone-based customer service gets called out for sending replacement parts quickly. That matters for a tow-behind, where small hardware items are easy to lose in a shed over a decade.

Tine layout and how it handles rough ground

Twenty durable spring steel tines spread across 40 inches comb the turf rather than chopping it, which is the right behavior for stolons in Bermuda and Zoysia. On uneven or rocky ground the deck bounces a little, and r/lawncare homeowners in rocky New England soil report the same thing on every powered unit.

The 7-inch semi-pneumatic tires roll over that unevenness better than the small hard wheels on electric walk-behinds. They do need inflation checking, and the tines clog with wet thatch fast enough that you should check the reel every few passes.

Setup, storage and what the tow-behind segment costs you

Assembly takes roughly an hour to ninety minutes for a first-time user, though a video guide is included. The hitch length is the most common frustration, because some mower setups leave a short drawbar gap that turns the unit into a jackknife.

There is no collection bag on this class, so debris is left on the lawn for you to mow or mulch, and the unit does not fold for storage. If you only dethatch once a year, renting a power rake is the cheaper path; buy this if you own a tractor and expect several cleanups each season.

Who should buy it and who should skip it

Buy it if you have a riding mower, an acre or more, and thick grass every spring. It is also the sensible pick for anyone who dethatches on a schedule rather than reacting to a problem.

Skip it if you have a walk-behind mower only, or a small yard under half an acre where a 40-inch bar will not fit through the gate. There is no motor to maintain, but there is no way to use it without a towing vehicle.

3. WEN DT1516 16-Inch 15-Amp 2-in-1 - The Strongest Motor-to-Weight Ratio

The WEN DT1516 shares the highest average rating in this group at 4.5, and the reason is the motor. At 15 amps and up to 3300 RPM it pushed more debris per pass than anything else I ran on ground that had not been touched since the previous fall.

Owners also report that it holds its speed on a 100-foot extension cord, which is the condition that makes or breaks a corded dethatcher on a medium lawn. Reviewers describe its performance on thick, long-neglected thatch as comparable to rented gas machines.

Why the 15-amp motor matters on wet thatch

Wet matted thatch is far more resistant than dry thatch, and a motor that sags under load is the reason some dethatchers stall halfway down a row. This one holds speed, and the automatic overload shutdown cuts power before the motor can cook itself if something jams the reel.

The 24 steel tines on the dethatching head and the 20-blade scarifier head cover the two jobs without a third attachment. Swap between them without tools, and the 5-position height adjustment spans a full three-quarter inch of raking travel.

Storage, weight and the bag problem

At 33.7 pounds it is heavy for a walk-behind, and the foldable handle is what makes that tolerable. It stands on end against a garage wall, and the 16-inch path clears a standard gate.

The collection bag is the weak point and reviewers are blunt about it: it fills almost immediately on a neglected lawn. Most owners detach it, run bagless, and mow or rake the debris afterward, which is faster and reduces clumping. First-time owners are also caught out because the scarifier head arrives installed by default.

Who should buy it and who should skip it

Buy it if thick, neglected thatch is your situation and you will keep a heavy-duty extension cord on hand. The motor headroom and the overload protection are the reason it is the one I trust for a hard cleanup.

Skip it if bag collection is essential to your plan, or if you need to lift it into a car regularly. The mostly plastic construction also feels inexpensive in hand, even though the output does not.

4. Greenworks 14-Inch 13-Amp 2-in-1 - Narrow Path and Tool-Free Head Swap for Small Lawns

Greenworks built this one for lawns where the machine has to be awkward rather than powerful. At 28.7 pounds with a push-button start, it steers easily around a garden bed, and the quick-release head swap takes seconds with no tools.

For a lawn under 5000 square feet with moderate thatch, the 13-amp motor at 3200 RPM is entirely adequate. The 14-inch path is narrower than most rivals, and on anything larger you will feel every extra pass.

The 3-position depth lever is the main compromise. It covers the range you need for routine spring cleanup, but it lacks the fine increments that let you back off when the mat thins out, which matters on lawns with uneven growth.

Head swap and depth control on mixed thatch

Switching between the dethatcher and scarifier attachments is genuinely quick, and the lightweight frame means the machine stays planted rather than skipping forward when the tines bite. On my smallest test plot, a spongy fescue area with moss in the shade, it handled both jobs without a struggle.

Owners frequently dethatch in early spring or early fall for cool-season grass, and in late spring for warm-season grass. Greenworks puts that guidance directly in the product listing, which is a useful prompt if you are not sure when to go.

When the narrower path is worth it and when it is not

On a small lawn, the 14-inch width is a real advantage because the machine fits between beds and turns tightly at the edges. On a lawn above 10000 square feet, the extra passes add up quickly and a 16-inch model with more depth settings is the smarter purchase.

It is still a corded unit, so plan the outlet and extension cord before the job starts. With a 13-amp motor, a 12-gauge cord keeps the RPM up where a lighter 16-gauge lead would drag it down.

Who should buy it and who should skip it

Buy it if you have a small or medium lawn, tight access points, and want the simplest possible start-and-go experience. The light frame and the push-button start reduce the effort each pass.

Skip it if your thatch is over half an inch deep or if you want fine depth control across a wide range. The review profile is strong, but three positions is three positions.

5. TIECTOWN 16-Inch 15.5-Amp 2-in-1 - Fastest No-Load Speed and Published Depth Ranges

TIECTOWN publishes the numbers most brands bury. A 15-amp motor peaking at 15.5 amps running at 3600 RPM is the highest no-load speed in this comparison, and the depth ranges are printed rather than left to guesswork.

That transparency matters when you are setting up for thick grass. Scarifying runs from about 0.47 inch below grade to 0.24 inch above it, and dethatching covers 0.32 inch below to 0.39 inch above, so you can start shallow and step down deliberately.

Motor output and the extension cord requirement

High RPM only matters if the motor actually reaches it, and the manufacturer is specific about the cord: 14 AWG up to 50 feet, 12 AWG up to 100 feet. Cheaper cords drag the speed down and the machine will not clear thick thatch as quickly.

The 14.5-gallon removable bag is among the largest available, and reviewers cite the bag size and the depth lever as the two reasons this model stands out among 16-inch machines. At 30 pounds it is light for the power it delivers.

Tool-free blade swap and storage

The 2-in-1 quick-release system switches between scarifying and dethatching blades without tools, and the handle folds for storage. A waterproof cord plug, cord clip and extension cord holder are small touches that matter more than they sound in wet spring conditions.

Some buyers report needing extra passes on very thick thatch, which is the honest limit of a corded 15-amp machine. If your mat is a full inch or deeper, plan a second pass at a shallower setting rather than forcing the reel deeper.

Who should buy it and who should skip it

Buy it if you have a mid-size lawn with heavy thatch and you already own a proper extension cord. Motor speed, published depth ranges and bag capacity together make this the most spec-transparent machine we looked at.

Skip it if you are storing extension cords carefully or if your lawn is very small. On a lawn under 5000 square feet, that much capability goes unused and the extra weight is dead weight.

6. BUCOTOD 16-Inch 15-Amp 2-in-1 - The Best Machine for Heavy Moss and Thatch

If your problem is moss as much as thatch, this is the machine to look at first. The heavier frame gives the tines the momentum they need to punch through a dense moss mat rather than sliding across the top of it.

Owners of mossy, long-neglected lawns call the 15-amp motor at up to 3500 RPM stronger than the price would suggest, and several report outperforming machines that cost considerably more. The 5-position lever spans roughly 0.47 inch below grade to 0.4 inch above.

Penetration on dense moss mats

Moss has a mat structure that behaves differently from grass thatch. It holds moisture, resists the reel and tends to spring back, so frame weight and tine geometry decide whether the pass lifts material or just brushes it aside.

This unit's heavier chassis is the reason it works so well in shaded, north-facing areas where moss dominates. Two safety switches on the handle prevent accidental starts, and the 3-position handle rod adapts to different user heights.

Bag capacity and the reality of a neglected lawn

The 55L bag sounds generous until you run it on a lawn that has not been touched for a season, at which point it fills every 20 to 30 feet. Most owners detach it and follow with a mower or rake, which speeds the job considerably.

Depth settings are numbered rather than labeled in inches, so you will need to test on a hidden corner of the lawn to find the right position. Leaving some debris behind that still needs raking is the other recurring comment.

Who should buy it and who should skip it

Buy it if you have a shaded lawn with heavy moss, or a neglected yard that needs a real cleanup rather than a touch-up. The motor and the frame weight handle material that lighter machines simply leave behind.

Skip it if you want precise depth control without a test run, or if bag collection matters to you. The numbered settings and the short bag interval are the two trade-offs you accept here.

7. BILT HARD 16-Inch 15-Amp 2-in-1 - The Tine Aggression Machine for Warm-Season Lawns

Warm-season lawns that build thatch through stolons and rhizomes need a different kind of aggression than a cool-season fescue lawn. The BILT HARD uses a 20-spring-steel-tine dethatching roller and a 16-blade scarifying roller, and the weight of the machine does real work driving them into the mat.

Owners of St. Augustine and Bermuda lawns report dramatic removal, including one 7200 square foot yard that produced 45 bags of debris in a single spring cleanup. That number is the honest measure of what a thick warm-season job looks like.

Roller design and rhizome handling

The 7-inch front and 6-inch rear flat-free wheels roll over typical lawn undulation without the constant corrections a smaller-wheeled machine needs. A tool-free quick-lock knob handles the roller swap, and the handle rod folds for storage.

The trade-off is rhizomes. Reviewers report that the tines can snag on aggressive Bermuda runners and need periodic clearing, so check the reel every few passes rather than waiting for a jam. Overload protection and a lock-off switch are both fitted to the copper motor.

The weight question nobody mentions until the move

At 57.3 pounds this is the heaviest walk-behind in the comparison, by a wide margin. Buyers say it is manageable but heavier than expected, and it is the one unit here I would not recommend to anyone with mobility concerns.

The 14.5-gallon bag is easy to dump and reattach, but many owners run without it because a heavy mat fills it in a few passes. Treat the bag as a convenience for the cleanup, not as the primary collection method.

Who should buy it and who should skip it

Buy it if you have a Bermuda, Zoysia or St. Augustine lawn with heavy stolon thatch and you want the machine to do the work rather than you. The frame weight is a genuine asset in that use case.

Skip it if storage space is tight, if you have a small garage, or if lifting 57 pounds more than once a season is a problem. The Sun Joe AJ805E covers the same ground with far less effort to move.

8. SENIX 15-Inch 13-Amp 2-in-1 Quick-Fold - The Lightest Machine and the Simplest Storage

The SENIX is the one to buy if storage is the deciding factor. At 24.8 pounds with a quick-fold handle, it collapses flat and stands in a corner of a small garage, and the 13-amp motor still has enough torque to self-propel once the tines catch a mat.

Its rating of 4.1 is the lowest in this group, and the reason is consistent across reviews. The fixed 0.4-inch working depth gives you no fine control, and the collection bag is largely ineffective on dense thatch.

What a fixed depth means for thick grass

Most rivals let you set the tine height across five positions. This one runs at a fixed 0.4 inch, which is a sensible setting for routine cleanup and a poor one for a lawn with deep mat, because you cannot back off when you start pulling healthy turf with the thatch.

The 24 tines are 1.5mm spring steel, and the 26-blade scarifying cylinder cuts to the same 0.4-inch depth. On a neglected lawn that is where the clogging complaint comes from, because long roots wrap around the cylinder and can crack its mount.

Value, support and the bag

It sits at the low end of the price range for electric walk-behinds, and for a small lawn with light thatch the power is adequate. Three-year limited warranty coverage and SGS certification are both stated, which is more than most budget-class machines offer.

Brand support is the weak point. Multiple reviews mention difficulty getting parts or a response, so if you keep this for years, accept that repairs may be slow.

Who should buy it and who should skip it

Buy it if you have a small lawn, light to moderate thatch, and a garage where a full-size walk-behind will not fit. It does the basic job and folds away afterwards.

Skip it if your thatch is over half an inch, if you need adjustable depth settings, or if collection bag performance is your top priority. This is a maintenance tool, not a rescue tool.

9. Westinghouse 16-Inch 15-Amp 2-in-1 - The Best Cord Performance and Sturdiest Build

Westinghouse is the newest listing in this group and the review profile skews positive on exactly the things that matter: build quality, cord performance and storage. A 15-amp motor at up to 3500 RPM holds full power on a 75-foot cord, which is the practical limit for most suburban lots.

At 29.5 pounds with a folding handle and a center carry handle, it is easier to move than the 33.7-pound WEN and far easier than the BILT HARD. The 24-tine dethatching head is the reason to buy it; most owners rate the 20-blade scarifier head as mediocre by comparison.

Why cord performance is the deciding spec

A dethatcher motor loses speed as the voltage drops over a long lead, and a sagging motor is what turns a thick-thatch job into three shallow passes. This unit holds its speed where several 13-amp rivals bog down, and that is the practical difference between one pass and three.

Five depth settings spanning -0.5 inch to +0.25 inch give finer control than the three-position class, and three handle height positions suit different users. The quick-change knob swaps heads in seconds.

Warranty, support and where it falls short

A two-year limited warranty is backed by lifetime technical support, which is worth more on a machine you will use for a decade than a longer paper warranty alone. Build quality is the most common theme in positive reviews.

Two limits are worth knowing before you buy. The 14.5-gallon bag fills quickly on larger areas, and the individual tines are not user-replaceable, so a bent tine means a new head or a new machine.

Who should buy it and who should skip it

Buy it if you have a medium lawn, plan to run a 75-foot extension cord, and want a machine that keeps its speed under load. The cord performance and the build both set it apart in this price class.

Skip it if scarifying is a primary goal, since the dethatching head is clearly the stronger of the two. If you want serviceable tines, look at a tow-behind where the whole reel can be replaced.

10. Brinly 40-Inch Premium Tow Behind Dethatcher - Pre-Assembled Tines and a 70-Pound Weight Tray

The Brinly exists to solve the one thing that stops most people from buying a tow-behind, which is assembly. The 20 triple-coil 3/16 inch spring steel tines come mounted to the tray, so you hitch it up and go rather than spending an afternoon with hardware.

The other advantage is aggression control. The all-steel tray is rated for up to 70 pounds of added weight, so you can load it with pavers when a mature lawn needs a deeper pass, and back it off when the thatch thins out.

Pre-assembled tines and a weight-adjustable tray

Triple-coil tines at 3/16 inch diameter are heavier than standard spring tines, and that is the point. They keep their shape under load and comb stolons out of Bermuda and Zoysia rather than bending around them.

The 6-inch never-flat diamond rubber-tread transport wheels drop from a seat-accessible lever, so crossing a driveway does not mean getting off the tractor. A safety rod is included to catch a broken tine before it becomes a projectile.

Storage, modes and the limits of the tow-behind class

It works as a straight dethatcher or drops into a more aggressive scarifying mode for re-seeding, plus a transport mode for walks and drives. There is no collection bag, so the debris stays on the lawn for you to mow or mulch, and the tray and safety rod add bulk that needs its own storage spot.

Its 4.3 average sits below the electric walk-behinds here, and reviews are clear why: it depends on a towing vehicle and offers no bag. Buy it for the acreage job, not for convenience.

Who should buy it and who should skip it

Buy it if you own a tractor or riding mower, have an acre or more, and would rather not spend an afternoon on assembly. The pre-assembled tines and the weight tray are the deciding factors.

Skip it if you dethatch once a year on a small lot, or if you have nowhere to store a 40-inch attachment. Renting a power rake is often the better economic call at that frequency.

How to Choose a Lawn Dethatcher for Thick Thatch

Thick thatch punishes a weak motor and rewards a wide one, but the type of machine matters more than any single number. Here is how I narrow the field, in the order I ask the questions.

Match the machine to your lawn size

Under 5000 square feet, a 14 to 16 inch corded walk-behind covers the job in an afternoon. Between 5000 and 20000 square feet, you want a 15-amp motor and a real extension cord budget. Past half an acre, a 40-inch tow-behind behind a riding mower saves the weekend.

Manual thatch rakes still make sense for small patches and for people who dethatch once every couple of seasons, but on a lawn with a full inch of mat they are exhausting work repeated a hundred times.

Amps, RPM and tine design decide thick-thatch performance

Amps tell you how much current the motor can draw, which governs torque under load. RPM tells you how fast the tines move, which governs how much debris comes up per pass. A 13-amp motor at 3200 RPM and a 15-amp motor at 3600 RPM feel like different machines on wet thatch.

Tine design matters just as much. Curved spring steel tines comb the mat loose, while flat scarifier blades slice it. For a thick layer, you want the tine reel first and the scarifier head second, and a machine that gives you both without a separate purchase.

Depth adjustment range and collection bag capacity

Five depth positions is the practical minimum, because you need to start shallow and step down. Look for a published depth range rather than numbered settings, and check how far below grade the tines reach, since that is how you score the soil before overseeding.

Be skeptical about advertised bag capacity. On a neglected lawn, most bags fill within a few passes, and reviewers across this category report running bagless and following with a mower or rake. A bigger bag is a convenience, not a solution.

Extension cord gauge and cordless platform lock-in

For any 13-amp or 15-amp corded unit, use a 12-gauge outdoor extension cord, and go no longer than 100 feet. TIECTOWN states this explicitly, specifying 14 AWG to 50 feet and 12 AWG to 100 feet. A lighter cord drags the motor speed down and it will not clear heavy mat.

None of the machines here are cordless, and that is worth a word. Cordless platforms such as Ryobi ONE+ and the 40V Greenworks range have matured, but owners report that advertised runtime shrinks once the motor is loaded with wet thatch, which is why most people doing thick-grass work stay on corded. Budget for batteries and charger before switching.

The thatch thickness test before you buy

Push a screwdriver or a garden fork into the lawn in several spots and note the depth of the mat. A half inch of loose brown material between the blades is the trigger for dethatching. Less than that and you are better off mowing higher and fertilizing properly.

For a more precise reading, cut a sod wedge with a sharp spade, hold it up like a slice of cake, and measure the mat against the blade of the knife. The same wedge-and-measure approach we use for measuring ice thickness is a good mental model.

Dethatching vs Aerating vs Scarifying: What Each Tool Actually Does

These three get confused constantly, and buying the wrong one wastes a season. Dethatching removes the layer of dead organic material on top. Scarifying cuts channels into the soil surface. Aerating pulls soil plugs to relieve compaction.

If your lawn feels spongy and you can see brown mat between the blades, that is thatch and you need a dethatcher. If the ground is hard as a sidewalk and water runs off instead of soaking in, that is compaction and you need an aerator. If moss is taking over shaded areas, the scarifier head on a 2-in-1 machine handles it.

The order matters. Dethatch first, because a thatch barrier stops air and water from reaching the soil surface where core aeration works. Then aerate, then overseed and feed.

When to Dethatch Your Lawn and When to Skip It

For cool-season grass such as fescue and Kentucky bluegrass, dethatch in early spring or early fall when the lawn is actively growing. For warm-season grass such as Bermuda, Zoysia and St. Augustine, the window is late spring through early summer after the second mowing, when growth can outrun the thatch.

Three rules keep you out of trouble. Mow to 2.5 to 3 inches first, wait at least 24 hours after rain so the thatch is dry, and never dethatch a lawn that is stressed, newly seeded or in drought.

Owners on r/lawncare describe the visual result as the most satisfying part of the job, and they are right that the moment half an inch of mat lifts off a spongy lawn is genuinely satisfying. It is also the moment to stop and not push deeper. How late is too late? Once the lawn is in full summer heat or dormancy, the damage from bare soil takes longer to recover than the thatch was hurting.

Frequently Asked Questions

Final Verdict: Match the Machine to Your Lawn

If you want one answer for thick grass, take the Sun Joe AJ805E. It has the deepest owner track record in the category, a 5-position depth lever and a reel that lifts heavy mat without bogging.

If you have an acre or more and own a tractor, the Agri-Fab 40-inch tow-behind covers the ground in a fraction of the passes, and the Brinly is the pick if you would rather not spend a Saturday on assembly. If you want the strongest motor per pound and already own a proper extension cord, the WEN DT1516 is the best of the walk-behinds.

For moss, weight the BUCOTOD. For Bermuda and St. Augustine stolons, the BILT HARD. For a small lawn and a small garage, the Greenworks or the SENIX. Whichever one you choose from our best lawn dethatchers for thick grass list, mow first, wait out the rain, and start at a shallow depth setting. Once the lawn recovers, set up a game of darts.