Under Sod - The First Ever Fertilizer For Beneath New Sod

Protect Your Sod Investment With Under Sod Fertilizer

About Under Sod

🌿 Why New Sod Needs Our Sod Fertilizer

Sod may look like a finished lawn when it's rolled out, but in reality, it’s a living product that’s just been through an intense trauma. When sod is harvested, its root system is severed—often cutting off more than half of its original roots. It’s removed from its native soil, rolled up tightly, stacked on a pallet, and shipped off to a new location. From that point forward, it’s in survival mode.

This process puts sod under immediate transplant stress, which can lead to:

Dehydration, especially in warm weather
Delayed root establishment in unfamiliar soil
Yellowing or browning from nutrient deficiency
Susceptibility to disease and heat stress

Sod has one urgent job when it hits the ground: establish new roots—fast.

🌱 How Under Sod™ Helps Sod Recover and Take Root

Under Sod™ is designed to solve that exact problem. Instead of laying sod onto lifeless, nutrient-deficient soil—or relying on a fertilizer meant for established turf—Under Sod™ is applied before the sod is installed, creating a rich, biologically active base layer to support root regrowth from day one.

Here’s how it helps:

✔️ Mycorrhizae for Rapid Root Rebuilding

Our blend includes a potent dose of 1.75% mycorrhizal fungi, which form a natural symbiotic relationship with your sod’s newly forming roots. These fungi extend the root system through microscopic filaments, allowing the turf to absorb more water and nutrients than it could on its own. This is especially critical during the first few days when the sod is reestablishing itself in new soil.

✔️ Seaweed Extract to Reduce Transplant Shock

We include seaweed extract (Ascophyllum nodosum) because it contains natural plant hormones (cytokinins and auxins) that stimulate root initiation and reduce cellular stress. Seaweed helps sod bounce back faster, maintain hydration, and initiate the rooting process more quickly after installation.

✔️ Humic Acids to Build a Better Soil Environment

Humic acids improve nutrient uptake and support microbial activity in the soil, which helps the new roots interact more effectively with their environment. They also increase water retention—crucial during those first critical days after installation.

✔️ Slow-Release Fertility That Feeds Without Burning

Our 4-4-4 organic nutrient base provides balanced, gentle nutrition that feeds the sod as it roots—without overwhelming or burning the tender roots that are just beginning to regrow.

The Right Fertilizer for the Moment Sod Needs It Most

Sod doesn’t need generic lawn fertilizer. It doesn’t need heavy nitrogen. What it really needs is a biologically enriched layer beneath it—something that helps it transition from harvested roll to living, thriving lawn.

That’s exactly what Under Sod™ delivers.

It’s not just fertilizer—it’s a rooting strategy. And it’s designed to help sod do what it must do immediately after harvest: rebuild its roots, bond with the soil, and start growing like it never missed a beat.

Why Choose Under Sod

Choose Under Sod™ because it’s the only fertilizer specifically designed to go beneath new sod—right where it matters most. While traditional fertilizers sit on top, Under Sod™ delivers essential nutrients, mycorrhizae, seaweed, and humic acids directly into the soil to help freshly harvested sod recover, root faster, and establish a healthier lawn from day one. It’s not just a fertilizer—it’s a foundation for success.

The Only Fertilizer Designed TO GO Under New Sod

Under Sod - The Worlds Only Under Sod Fertilizer

Under Sod™ is the first and only fertilizer on the market specifically engineered to be applied beneath freshly laid sod. Unlike generic starter fertilizers or top-applied lawn treatments, Under Sod™ delivers targeted nutrients and biological activity right where it matters most—under the root zone.

If you’re laying sod, whether as a homeowner or a professional contractor, you know that those first few days are critical. Sod must root quickly, absorb moisture efficiently, and adapt to its new environment—all while avoiding transplant shock and nutrient gaps.

That’s why Under Sod™ exists.

💡 Why Traditional Fertilizers Fall Short for Sod Installations

Most fertilizers on the market are designed to sit on top of the grass or act as general-purpose lawn starters. These products don’t account for the unique biology of sod installation:

Sod has no established roots when it’s installed
Water and nutrients must reach the soil beneath the sod, not sit on top of it
Sod requires immediate contact with healthy, active soil biology
Top-applied fertilizer often runs off before it can be absorbed by new roots

Under Sod™ fixes all of that—by being applied before the sod is laid.

🌱 What Makes Under Sod™ Different?

Under Sod™ is a 4-4-4 slow-release organic fertilizer enriched with Mycorrhizae, Seaweed Extract, and Humic Acids, all chosen for their synergistic benefits to turf root development.

✔️ Apply It Before You Lay Sod

Broadcast Under Sod™ directly on your prepared soil before unrolling your sod. This ensures that the roots immediately contact rich, biologically active material that promotes rooting and nutrient uptake.

✔️ Tailored Nutrients for Root Growth

The balanced 4-4-4 ratio supports strong initial growth without overstimulating top growth too early.

✔️ Mycorrhizae for Deep, Fast Root Establishment

A powerful blend of 1.75% VAM Mycorrhizal spores enhances water absorption, increases nutrient access, and strengthens turf against stress from drought or heat.

✔️ Seaweed & Humic Acids for Soil Vitality

Our seaweed extract (2.0%) and humic acids (~6.0%) stimulate microbial activity and improve soil structure, giving your sod the ideal conditions to thrive from Day 1.

✔️ No Iron or Additives You Don’t Need

We intentionally exclude Iron (Fe), which offers no benefit at the rooting stage, to keep the blend clean and cost-effective.

How Under Sod™ Works Beneath the Surface

Soil Contact: Fertilizer is spread before sod is installed, placing nutrients directly in the root zone.
Biological Activation: Mycorrhizae begin colonizing the soil immediately, bonding with turf roots as they emerge.
Water Efficiency: Seaweed and humic acids improve water retention and nutrient uptake—ideal for new sod under stress.
Root Acceleration: Roots grow deeper, faster, with greater resilience, reducing transplant shock and promoting long-term lawn health.

Product Highlights

N-P-K: 4-4-4 slow-release organic
Additives: 1.75% Mycorrhizae • 2% Seaweed • 6% Humic Acids
Coverage: 25 lb bag = 1,000 sq ft (covers approx. 2 pallets of sod)
Granule Size: Fine/medium for even spread and fast soil contact
Safe: Non-burning and safe for pets and children once watered in
Application: Apply directly to soil before sod installation

Who Should Use Under Sod™?

🏡 Homeowners

Want a greener, healthier lawn faster? Don’t waste your sod investment with a generic fertilizer. Use the product made for sod installs.

🧱 Landscapers & Contractors

Every sod job is a reflection of your reputation. Under Sod™ helps your installations root faster, look greener, and last longer—leading to fewer callbacks and happier customers.

🏢 Property Managers

Improve turf success on commercial, municipal, or HOA properties with the only sod-specific fertilizer designed for bulk installs and performance.

The Results Speak for Themselves

Sod that’s installed with Under Sod™:

Roots faster
Requires less water over time
Shows less yellowing or stress during establishment
Grows in thicker, healthier, and more resilient

We’re redefining how sod gets installed—by starting from the ground up.

Ready to Try Under Sod™?

Whether you’re doing a small backyard or a commercial field, Under Sod™ is the professional-grade solution that gives your lawn the best possible start.

📍 Available online and at participating dealers

📦 25 lb bags • Covers 1,000 sq ft

🛠️ Designed to be used before sod is laid

👉 Order now or find a distributor

👉 Want to carry Under Sod in your store? Contact us to become a partner

Under Sod