Smart Professional Sports Teams Are Putting Down Real Grass with Ancient Soil Underneath
By Lauren Cain, Founder & Chemical Engineer at Elm Dirt · Updated June 2026
Okay, I know what you're thinking. "Lauren, you talk about worm castings and tomatoes. What do you know about NFL stadiums?"
Fair. But stay with me for a second.
I work with a professional landscaper who has installed sod on university athletic fields across the country — and he uses our products to do it. So when I say this stuff works at a professional scale, I'm not guessing. I've seen it.
The reason professional sports teams are ripping out millions of dollars of artificial turf and laying down real grass right now? It's the same reason your garden does better in living soil than in dead dirt. Roots need biology. That's it. That's the whole thing. And some of the best-funded turf managers in the world are just now figuring out what good gardeners have known for years.
Let me walk you through what's happening — why it matters even if you've never cared about a single football game — and why the same stuff in your garden shed is being used to build grass that can survive 80,000 fans and a weekly pounding from professional athletes.
First: Why Artificial Turf Has a Real Problem
Artificial turf seemed like a genius idea back in the 1960s. No watering. No mowing. Same surface every game, rain or shine. Astroturf went into the Houston Astrodome in 1966 and stadiums just… followed along for decades.
The problem is, we know a lot more now than we did then.
It Gets Dangerously Hot
On a warm summer afternoon, artificial turf can hit 150–200°F at the surface. Real grass? It stays close to air temperature because the plants are actually transpiring — basically sweating, same as you do. Research published in Building and Environment confirms synthetic turf traps heat at levels that are genuinely dangerous to athletes. And to kids at the park on a hot July afternoon, for what it's worth.
It Tears Up Bodies
This one is a big deal, and professional players have been saying it for years. The NFL Players Association has released survey after survey showing players believe artificial turf is harder on their bodies — and the injury data backs them up. Non-contact ACL tears happen more often on artificial turf than on natural grass.
Here's why. Cleats grip synthetic fibers differently than they grip grass. On turf, your foot can lock in place while your body keeps moving. On real grass, there's just a tiny bit of give. That little bit of give? It's the difference between walking off the field and getting carted off.
Those Little Black Pellets Are Not Great
Most modern artificial turf has crumb rubber infill — the small black pellets you've probably seen on your kids after they played on a turf field. They're made from ground-up recycled tires, and they go everywhere. Shoes, hair, lungs. The National Institute of Environmental Health Sciences has raised concerns about polycyclic aromatic hydrocarbons (PAHs) in crumb rubber — that's a class of known carcinogens. The research is still developing, but "we'll wait and see on the carcinogens" isn't exactly a parenting philosophy I can get behind.
And It Can't Heal Itself
Real grass recovers. A divot fills back in. Compacted soil loosens up as roots work through it and microbes break down organic matter. Artificial turf just… stays compacted. Seams split. The infill shifts around. And here's the kicker: when you add up maintenance, replacement, and heat management systems over 10 years, synthetic turf often costs more than well-managed natural grass. The economics don't even work out.
💡 Short version: Artificial turf is hot enough to cause heat illness, causes more injuries than real grass, contains tire chemicals, and can't repair itself. Professional sports organizations worldwide have been looking at this data — and they're changing course.
FIFA Said Enough: Real Grass at the World Cup
When FIFA announced that every 2026 World Cup venue had to have natural grass, that was not a small thing. FIFA runs events across 80+ countries with completely different climates. Natural grass is harder to maintain than fake turf. They chose harder because the player safety data left them no other honest choice.
For the 2026 World Cup — hosted in the U.S., Canada, and Mexico — several stadiums that had artificial turf, including some NFL venues, had to rip it out and put down real sod. And that process is exactly where living soil biology becomes the most important tool a turf manager has.
Installing sod in a 70,000-seat stadium isn't like patching a bare spot in your backyard. These fields get cleats driven into them, 60,000 people packing the stands, games every single week. The grass has to root fast, go deep, and bounce back from damage that would kill a home lawn three times over.
That's exactly where Ancient Soil and Plant Juice come in.
The NFL Is Asking the Same Questions
The NFL has moved slower than soccer — partly because of how much money teams have sunk into artificial turf over the years. But the injury data keeps piling up, and the Players Association keeps pushing.
Several teams have already switched back to natural grass or are actively looking at it. The conversations in NFL front offices right now sound a lot like what happened in home gardening about a decade ago: we thought synthetic was easier and better, and it turned out we were wrong about both.
The teams doing this right aren't just throwing sod down on whatever's underneath and hoping for the best. They're engineering the root zone. They're thinking about what's alive in that soil. And the ones that are getting it right are using biology — because that's what the actual turf science research says works.
So Why Ancient Soil Under the Sod?
Any time you lay new sod — stadium or backyard, doesn't matter — the grass goes through transplant shock. The roots were cut when the sod was harvested. The microbial community the grass had been living with? Gone. It has to build everything back from scratch in completely new ground.
In your garden, that might mean some sad brown patches for a week or two. On a professional sports field that has to host a game in ten days, it's a genuine emergency.
This is the exact problem Ancient Soil — our Class A certified worm castings — is built to solve. (If you've ever wondered what the big deal is about worm castings, we have a full breakdown in The Secret Ingredient in Worm Castings Your Soil Is Missing.)
What Ancient Soil Actually Does Down There
Ancient Soil is packed with over 250 species of beneficial bacteria and fungi. When you spread it underneath new sod before it goes down, those microbes move into the root zone immediately and get to work:
- Breaking down organic matter and converting it into nutrients the new roots can actually reach and use right away
- Forming partnerships with grass roots — helping them handle stress, fight off pathogens, and pull in more nutrients than they could on their own
- Producing natural plant hormones (auxins, cytokinins) that tell roots to grow longer and branch out faster
- Building mycorrhizal networks — essentially a second root system made of fungal threads that can extend ten times farther than the physical roots alone
- Improving soil structure by creating tiny pore spaces that hold both water and oxygen at the same time, which turf needs to survive hard play and heavy irrigation
Research from Penn State's Center for Sports Surface Research has shown that biological activity in the soil is one of the biggest factors in how quickly turf recovers after it takes a beating. More alive soil = faster recovery. Every time.
For a field that hosts 40 or 50 events a year, that recovery time is genuinely everything.
Ancient Soil — Class A Certified Worm Castings
2 lb bags for home gardeners, 25 lb bags for serious turf work. 250+ species of living beneficial biology in every bag.
Shop Ancient Soil → Bulk Orders at elm.ag →Then You Drench It with Plant Juice
Ancient Soil puts the biology in the root zone. Plant Juice — our CDFA Certified Organic liquid biofertilizer — is what you apply after the sod is down. Think of it as backup reinforcements arriving to support everything Ancient Soil already started.
Our BiomeMakers lab report (CUX005) independently verified 291 microbial species actively living in Plant Juice. Not claimed on a label — verified by a third-party lab. And those microbes have actual jobs:
Let Me Name the Microbes Actually Doing This
I love this part because it's where the product stops being abstract. These aren't just "good bacteria." They're specific organisms doing specific things — and they happen to be some of the most well-studied microbes in turf and plant science:
- Azospirillum
- Pseudomonas putida
- Trichoderma
- Bacillus subtilis
- Rhizobium
- Flavobacterium
- Lysobacter
- Mortierella
- Herbaspirillum
- Variovorax paradoxus
Azospirillum has been studied specifically in turf contexts. Research published in the Journal of Applied Microbiology shows it makes grass roots grow longer and become more drought-resistant — which matters a lot when 300-pound athletes are running on it every week. Trichoderma is one of the most effective biocontrol fungi that exists — it actively hunts down the fungal pathogens that love to attack newly installed, stressed turf. Bacillus subtilis produces natural antibiotics right in the root zone, suppressing the soil-borne diseases that can wipe out new sod fast.
Put them all together and you're building a living defense system under that grass from the day it goes down.
I want to spend a second on that ACC deaminase stat — 82% — because it's especially relevant for sod. When a plant is stressed, it produces a compound called ACC. ACC basically tells the plant: stop growing, just survive. Bacteria with ACC deaminase activity break that signal down before the plant can act on it. So new sod treated with Plant Juice stays in growth mode instead of survival mode. PubMed research identifies this as one of the most reliable ways to reduce transplant shock in any plant species — not just grass. We go deeper on this in our post on reducing transplant shock with living soil biology.
"My Gala apple tree suffered catastrophic root damage after a late-winter wind storm this February — its third blown-over incident since I planted it five years ago. I uprighted it, repaired its supports, pruned damaged branches, and fed it Plant Juice. I honestly didn't think it would make it. But it not only survived — it started throwing new growth within weeks. I'm a believer."
If Plant Juice can bring back an apple tree that blew over three times and had its roots destroyed in a windstorm, imagine what it does for a well-funded sports field with a professional team applying it at scale.
Plant Juice — CDFA Certified Organic Liquid Biofertilizer
291 verified microbial species. Reduces transplant shock. Builds deeper roots from day one. One 2.5 gal jug makes hundreds of gallons of application-ready biofertilizer.
Shop Plant Juice → Commercial Bulk at elm.ag →The Stadium and Your Backyard: Same Science, Different Scale
Here's my favorite part of this whole topic. Whether you're managing turf at SoFi Stadium or trying to get a bare patch of lawn to fill back in before your neighbor notices, the biology is identical. Same microbes. Same mechanisms. Same results.
| The Challenge | Pro Sports Field | Your Lawn | The Fix |
|---|---|---|---|
| Transplant shock when sod goes in | High — field needs to be ready in days | Medium — patchy lawn looks rough | Ancient Soil + Plant Juice at installation |
| Root depth and anchoring | Critical — cleats rip shallow turf right out | Important — drought and foot traffic | Mycorrhizal networks from Plant Juice microbes |
| Disease pressure on new turf | High — fungal issues can destroy a field fast | Medium — brown patch, dollar spot | Trichoderma & Lysobacter in Plant Juice |
| Recovery after damage | Extreme — games every single week | Low — the occasional worn path | Living soil biology speeds up regrowth |
| Chemical input concerns | Reducing — player health is on the line | Reducing — kids, pets, family | Organic-certified inputs that feed the soil instead of burning it |
The only real difference is scale. And we have that covered too.
For Turf Pros and Landscapers: Head to elm.ag
🌱 If you're a professional landscaper, turf manager, or commercial grower — our bulk platform is at elm.ag. We manufacture around 120,000 gallons of Plant Juice per week out of Grandview, Missouri. We're built for commercial scale, and we'd love to talk.
If you're evaluating a switch from artificial turf or bidding a sports facility project, here's the basic approach we recommend:
- Mix Ancient Soil into the top 3–4 inches of the root zone at about 20–25% before sod goes down
- Lay sod normally
- Water in with Plant Juice right at installation — 1 oz per gallon, scaled up for field size
- Keep applying Plant Juice weekly for the first 6–8 weeks while roots establish
- Drop to monthly maintenance applications once the turf is fully anchored
What you get is a root system that goes deeper, recovers faster, and needs fewer synthetic inputs over time. Which is exactly what every organization moving away from artificial turf is looking for.
Reach out to our commercial team at vik@elmdirt.com or get started at elm.ag.
More from the Elm Dirt Blog
- Reducing Transplant Shock with Ancient Soil and Plant Juice
- Starter Fertilizer for Grass Seed: Your Complete Guide to a Thriving Lawn
- How Beneficial Microbes in Soil Actually Help Your Plants Grow
- Natural Lawn Care: Growing Real Grass the Right Way
- What Are Worm Castings and Why Are Serious Gardeners Obsessed With Them?
- The Mycorrhizal Network: Your Garden's Underground Internet
- The Science Behind Worm Castings
- What's Actually in Conventional Lawn Fertilizers?
Frequently Asked Questions
Why is FIFA banning artificial turf?
FIFA required natural grass at every 2026 World Cup venue because of player safety. Artificial turf gets dangerously hot and has been linked to higher rates of ACL injuries, skin burns, and abrasions. Real grass is just safer for the athletes on it.
Why are NFL players pushing for real grass over artificial turf?
The NFL Players Association has been raising this for years. Their own surveys show players strongly prefer natural grass, and the injury data backs them up — artificial turf is linked to more non-contact knee and lower-leg injuries. Players know it in their bodies, and the numbers agree.
What is Ancient Soil and why use it under sports turf?
Ancient Soil is Elm Dirt's Class A certified worm castings — loaded with over 250 species of beneficial bacteria and fungi. When you spread it under new sod before installation, it immediately starts colonizing the root zone, cutting transplant shock, stimulating root growth, and building the kind of living soil biology that gives grass the deep anchoring and fast recovery it needs to survive hard use.
How does Plant Juice help new sod on professional sports fields?
Plant Juice is a CDFA Certified Organic liquid biofertilizer with 291 verified microbial species. Watered in right after sod installation, it floods the root zone with organisms like Azospirillum, Trichoderma, and Bacillus subtilis — which accelerate rooting, block the plant's stress signals, and build mycorrhizal networks for a much deeper, more drought-resistant root system.
Where can professional landscapers and sports turf managers get Elm Dirt in bulk?
Bulk orders go through elm.ag — our commercial platform for landscapers, farmers, and turf professionals. You can also reach our commercial team directly at vik@elmdirt.com.
