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Short answer: Artificial turf usually goes flat for one of three reasons. The blades have been pushed over by feet, paws, or furniture (matting). The infill that props them up has compacted, shifted, or thinned out. Or the fibers themselves are worn out. Brushing against the grain with a synthetic-bristle brush fixes matting.1 Topping up with the same infill your installer used fixes low infill.2 If the blades flop back down within a week of a good brushing, look at the infill, not the broom.3
Two other things can look flat too: ripples or lifting seams (an installation issue) and fibers at the end of their life. Brushing won't fix either one. More on both below.
Most of the time, turf lies down because something underneath quit on it.
What actually holds turf blades up
Infill is recommended for most artificial lawns: granules (usually sand or a sand-like material) that sit down between the fibers, help hold them upright, add cushioning, and weigh the whole carpet down.2,4,5,6 Some dense landscape turf can stand on its own in light traffic, but many manufacturers and distributors recommend infill anyway.5 Your turf's manufacturer sets the target infill depth for your product, so the right amount for your yard is in its specs.2
When infill packs down or goes missing, the blades lose their support and lean over. Less infill also leaves more of each fiber exposed to UV light and wear, which speeds up fiber breakdown.7 So leaving flat turf alone can shorten fiber life.
The four kinds of flat (and which one you've got)
"Flat" is four different problems wearing the same outfit, and each one needs a different fix.
1. Matting: the blades got pushed over
This is the common one. Blades get pressed down along the routes people and dogs use every day: back door to patio, patio to the dog's favorite corner. Furniture, grills, and the kiddie pool that sat in one spot all summer leave square dents of their own.3 The fibers themselves are fine. They just need to be brushed back up.8
Heat makes it worse. Turf cleaners and installers in hot markets like Phoenix report that sustained high surface temperatures soften synthetic fibers, so matting develops faster than it does in cooler places.3,9
2. Infill problems: compacted or thin
Here the blades lift when you brush them, then lie back down within days. That's the tell. If fibers flatten again within a week of normal use after a thorough brushing, the problem is in the infill layer below.3 Either the infill has packed hard (it compacts under traffic) or there isn't enough of it left to hold the blades up.4
Arizona's monsoon season officially runs June 15 through September 30.10 Heavy downpours and wind can move infill around, so low spots are worth a look once the storms quit.9
3. Ripples, wrinkles, lumps, or lifting seams: an installation problem
If the backing itself is raised, you're not looking at matting at all. Turf expands in heat, and extreme heat can make it pull up into a wrinkle, especially when there isn't enough infill weighing it down or the installation and materials weren't up to the job.6 Seams that pull apart should go back to your installer promptly.1 No broom will brush out a wrinkle.
4. Worn-out fibers: the end of the road
Some flat is permanent. After years of being pressed down and released in the same spots, fibers lose their ability to spring back. Signs of this kind of fatigue: the flat areas follow your traffic paths, they developed gradually over months or years, the tips look frayed or faded, and brushing helps for only a few days.8 At that point, grooming only helps the look.
Which kind of flat do you have?
| What you see | Likely cause | Quick check | DIY fix | Call someone when… |
|---|---|---|---|---|
| Flat lanes along dog runs, the back door, and kid routes | Traffic matting | Brush a small patch against the grain. Do the blades lift? | Brush against the grain regularly; mix up traffic routes | The whole yard is matted and hand brushing can't keep up |
| Square flat patches | Furniture, grill, or pool left in one spot | Did something sit there? | Move it, brush, rotate furniture | The patch doesn't recover after repeated brushing |
| Blades lift, then flop again within days | Compacted or low infill | Probe the infill and compare it to an untouched corner | Loosen with brushing; top up with the same infill type | Infill is hard-packed across big areas, or you don't know what infill you have |
| Dull, gritty, crunchy turf after storms | Dust and debris packed into the fibers | Grit still visible after a rinse | Blow off debris, rinse, let it dry, then brush | Grit stays, or water pools |
| Ripples, wrinkles, lumps, lifting seams | Installation or base issue | Is the backing itself raised? | Don't try to brush it out | Right away: call your installer or a repair pro |
| Frayed, thin, faded blades that never stand up | Worn-out fibers | How old is the turf? Are blades broken? | Grooming only improves the look | Ask about repair or replacement |
How to brush flat turf back up
Matting and most infill problems start with the same fix: a good brushing. Here's how to do it without making things worse.
- Clear the surface. Pick up pet waste, then remove leaves and debris. A leaf blower works if you keep it on a low to medium setting, hold the nozzle 6 to 12 inches above the turf at a shallow angle, and skip vacuum mode, which can pull up infill.11
- Rinse if it's dusty, then let it dry. Brushing works best on a dry surface.12 Dirt and airborne grime make matting more likely, so a dusty yard is worth a rinse first.1
- Find the grain. Drag the brush across the turf. The direction that pushes back is against the grain.4 Brushing the way the blades already lean just presses them down harder.3
- Brush against the grain in overlapping passes with a stiff synthetic-bristle push broom or turf rake. Never metal or wire bristles.1,12
- Cross-brush stubborn areas from a second direction. Brushing in more than one direction helps stand fibers up and even out infill.12,1
- Give high-traffic zones extra passes, but keep the pressure reasonable. Don't dig into the backing, and don't overdo it: excessive brushing can damage fibers over time.12
Arizona timing: skip the "warm afternoon" advice in summer
You'll see advice to groom flat turf on a warm afternoon so the fibers are more flexible. In an East Valley July, that's how you end up hopping.
Synthetic turf gets hottest on clear, sunny, low-humidity days between noon and 3 PM.13 Penn State's sports-turf researchers note that published studies have recorded surface temperatures of 175°F in central Pennsylvania and 200°F on a 98°F day in Provo, Utah.13 A quick hose-down doesn't buy much, either. In one study, 30 minutes of watering dropped the surface from 174°F to 85°F, but it climbed back to 120°F within 5 minutes and 164°F within 20 minutes. Another found temperatures rebounded about 20 minutes after watering, though the turf stayed roughly 10 degrees cooler than unwatered turf for 3 hours.13
In summer, brush early in the morning, before the sun has had hours to cook the surface. A quick rinse first takes the edge off and settles dust, but the cooling fades fast, so don't count on it. From late October through April, a mild afternoon is fine.
How to check and top up infill (without making a mess)
Check it. Push a thin probe (the wire end of a landscape flag works) down through the infill until you feel the backing. Pinch the probe where it meets the top of the infill, pull it out, and measure.7 Do it in several spots, especially the high-traffic lanes, and compare with a corner nobody walks on.14
Match it. Use the same infill type and size your turf was installed with.14,7 Mixing infill types can make the infill pack down more easily, which is the opposite of what you want.7 If you don't know what's in your yard, ask your installer or check your paperwork before you buy a bag. In pet yards, zeolite infill is often chosen for odor control.9
Measure it. Follow your turf manufacturer's rate. As one example, Purchase Green recommends 1 to 2 pounds of infill per square foot for residential installations.5 That's one manufacturer's number. Yours may be different.
Apply it thin. Spread a thin layer (a drop spreader helps on larger areas), brush it into the fibers, then repeat until you reach the target depth.14,15 Dumping it all at once buries the blades.
If you'd rather not haul 50-pound bags around the yard, infill top-off is included in every Rootless full clean.
Push broom, turf rake, leaf blower, or power broom?
| Tool | Good for | Watch out for |
|---|---|---|
| Stiff synthetic-bristle push broom | Routine brushing, small yards, spot fixes | Slow going on big yards |
| Synthetic turf rake | Stubborn paths, loosening infill | Don't dig into the backing12 |
| Leaf blower (low to medium) | Debris, light fluffing | Close range or vacuum mode can pull infill11 |
| Power broom (turf-safe synthetic bristles) | Whole-yard matting and infill redistribution | Too much pressure or frequency can fray fibers, displace infill, and put warranty coverage at risk; check seams first16 |
| Metal rake or wire brush | Nothing. Never. | Damages fibers1,12 |
Power brooms come with rules. Manufacturer guidelines spell out which tools and methods are allowed, and warranties generally cover defects, so misuse is on you.2,16 Brush a dry surface, keep off loose seams, and use a light touch.12,16
Things that make flat turf worse
- Metal rakes or wire brushes.1
- Parking furniture, the grill, or a pool in one spot all summer.3
- Sharp-edged furniture, which can puncture or tear turf.1
- Blasting it with high-pressure water up close. SYNLawn warns that spray above 300 psi can damage turf and displace infill.1 Read before you pressure wash for the rest.
- Power brooming too hard, too often, or over loose seams.16
- Topping up with a different infill than the system was built for.14,7
- Ignoring it all summer, then trying to fix everything in one aggressive session. Heavy-handed brushing damages fibers too.12
An East Valley grooming calendar
This calendar is about grooming and infill only. For how often to brush and clean overall, see how often to brush and clean.
| When | Grooming focus | Timing tip |
|---|---|---|
| October to November (post-monsoon) | Check low spots for washed-out infill, brush the whole yard, top up where needed, look over edges and seams9,10 | Mornings are still safest in early October; afternoons get workable as it cools |
| December to February | Easy season for a thorough brush and infill check | Any dry, mild part of the day |
| March to May | Pre-summer brush and infill check before the heat arrives | Shift toward mornings as it warms up |
| June to September | Spot-brush traffic lanes, move furniture around; after storms, clear debris, rinse, let it dry, then brush9 | Early morning only; skip noon to 3 PM13 |
When flat means "call someone"
Grooming fixes matting and infill problems. It doesn't fix installation problems or worn-out fibers. Call a pro when:
- Blades won't stay up after a good brushing plus an infill check.3
- Infill is hard-packed across most of the yard.
- Water pools or drains slowly.17
- You see ripples, wrinkles, or lifting seams. That's an installer call.6,1
- Fibers are frayed, faded, or breaking.8
Flat fibers alone rarely mean you need new turf. Replacement becomes a question when fibers are badly worn, seams are torn, the backing is damaged, UV damage is extensive, or drainage has failed.17
What Rootless does about it. Our Infill Grooming & Replenishment service covers power brushing to lift compacted, matted fibers, infill decompaction and even redistribution, and top-off with matching infill material.
A Rootless full clean is four passes: debris, rinse, deodorize, groom. It's $249 for up to 600 sq ft, $349 for 601 to 1,200 sq ft, and $499 for 1,201 to 2,500 sq ft, and infill top-off is included. (Our debris-only Once-Over doesn't include power brushing, so it won't fix flat fibers.)
We handle turf cleaning across the East Valley, including turf cleaning in Gilbert, Chandler, Mesa, Queen Creek, San Tan Valley, Tempe, and Scottsdale.
Your fake grass called. It's lying down on the job. Get a price in about a minute, or call (480) 359-6507.
FAQ
Why is my artificial turf flat?
Usually one of three things: traffic from feet, pets, or furniture has pushed the blades over; the infill that supports them has compacted, shifted, or thinned; or the fibers are worn out. Heat can soften synthetic fibers, so matting tends to happen faster in hot climates like Arizona's.
How do I make flat artificial grass stand back up?
Clear debris, then brush against the direction the blades lean with a stiff synthetic-bristle broom or turf rake. Never use metal. If the blades flatten again within a week, check the infill and top it up with the same type your installer used.
Should artificial grass be completely flat?
The blades should stand up with a natural look, and the surface underneath should be smooth. Ripples, wrinkles, lumps, or lifting seams are installation or base issues that brushing won't fix. Call your installer or a repair pro.
How long does it take artificial grass to go flat?
There's no universal timeline. It depends on traffic, pets, heat, infill level, and how often you brush. High-traffic paths usually flatten first, and regular brushing slows it down.
Does artificial turf need infill?
Infill is recommended for most artificial lawns. It helps hold the blades up, adds weight, and helps protect the fibers. Some dense turf can stand without it in light traffic, but many manufacturers and distributors still recommend it, so check your turf's specs or manual.
How much infill does my turf need?
Follow your turf manufacturer's specification. As one example, Purchase Green recommends 1 to 2 pounds per square foot for residential installations. Add it in thin layers and brush it in between passes.
Can I use a power broom on my artificial turf?
Yes, if your turf's manufacturer allows it. Use turf-safe synthetic bristles and a light touch, brush when it's dry, and keep off loose seams. Too much pressure or frequency can fray fibers and displace infill, and warranties generally don't cover misuse.
What ruins artificial grass?
Common culprits are metal rakes and wire brushes, high-pressure spray up close, heavy or sharp-edged items left in one spot, and aggressive power brooming.
When is the best time to brush turf in Arizona?
In summer, brush early in the morning. Turf surfaces get hottest between noon and 3 PM on sunny days, and the cooling from a rinse fades fast. In cooler months, a mild afternoon is fine.
Does flat turf mean I need to replace it?
Usually not. Matting and low infill are fixable. Replacement becomes a question when fibers are badly worn or broken, the backing is damaged, seams are torn, or drainage has failed.
Sources
- Care and Maintenance Manual, SYNLawn, May 17, 2023.
- From the Field: Proper synthetic turf maintenance maximizes player safety and performance, Part 1, Penn State Center for Sports Surface Research (Tom Serensits), n.d. Sports-field guidance.
- How to Prevent Artificial Grass From Matting, TurFresh, accessed September 26, 2026.
- Artificial Turf Problems: How to Fix the 9 Most Common, TurFresh, June 30, 2026.
- What's the Deal with Infill?, Purchase Green Artificial Grass, updated November 27, 2023.
- Thermal Expansion & Contraction in Synthetic Turf, Synthetic Grass Warehouse, updated December 29, 2022.
- Maintaining synthetic surface safety, Tom Serensits and Andy McNitt, SportsTurf, September 2012.
- Artificial Grass Flattened? How to Fix It and When It Cannot Be Fixed, TurFresh, May 14, 2025.
- Artificial Turf Maintenance Guide for Arizona, White Rhino Turf, accessed September 26, 2026.
- Monsoon Awareness Week, National Weather Service Phoenix, accessed September 26, 2026.
- Can I use a leaf blower on artificial turf?, FusionTurf, accessed September 26, 2026.
- Guidelines for Maintenance of Infilled Synthetic Turf Sports Fields, Synthetic Turf Council, January 2013 (Rev. 1).
- Surface Temperature of Synthetic Turf, Penn State Center for Sports Surface Research, n.d.
- From the Field: Best Management Practices, Synthetic Turf Fields, Penn State Center for Sports Surface Research (Tom Serensits), n.d. Sports-field guidance.
- Will Heavy Rain Wash Away Turf Infill?, FusionTurf, accessed September 26, 2026.
- Everything You Need to Know About Power Brooming Your Turf, Dirty Turf, September 2026.
- Why Is My Artificial Turf Matted Down?, Manases Evergreen Turf, July 27, 2026.
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