Gypsum Greens
"After having a soil test, this product was needed to get my lawn up and growing."
Root Relief Gypsum
Improve Soil Structure & Root Growth Without Changing pH
$27.99
Make It Easy – Auto Delivery Program
Professional-Grade Granular Gypsum with Humic Acid – Advanced Soil Conditioning for Stronger Roots and Healthier Turf.
Our newly enhanced Root Relief Granular Gypsum + Humic Acid is more than just calcium sulfate — it’s a performance-driven soil amendment designed to improve soil structure, unlock nutrients, and stimulate deeper root development.
Formulated for serious lawn enthusiasts, this upgraded blend combines high-quality calcium sulfate with humic acid to improve soil aggregation, increase water infiltration, and enhance nutrient efficiency — all without altering soil pH.
Why Choose Gypsum with Humic Acid?
- Improves Soil Structure Fast: Loosens compacted clay soils and enhances aggregation for better root expansion.
- Stronger, Deeper Roots: Calcium strengthens cell walls while improved soil porosity promotes deeper rooting.
- Enhanced Nutrient Efficiency: Humic acid helps chelate and mobilize nutrients already in your soil.
- Increases Water Infiltration: Reduces runoff and standing water while improving drainage.
- Displaces Sodium & Excess Salts: Ideal for sodium-affected or high-salt soils.
- Safe Sulfur Source: Provides plant-available sulfate sulfur without burn risk.
- No Impact on Soil pH: Correct soil structure issues without raising or lowering pH.
The Added Power of Humic Acid
Humic acid acts as a natural soil activator. It improves cation exchange capacity (CEC), enhances microbial activity, and increases the availability of key nutrients like nitrogen, phosphorus, and micronutrients.
By combining gypsum with humic acid, you’re not just improving structure — you’re improving how your soil functions.
Ideal For:
- Heavy clay soils
- Compacted lawns
- Sodium or salt-affected areas
- New lawn establishment
- Garden beds and landscape areas
Application Guidelines
- Minimum Rate: 5 lbs per 1,000 sq ft
- Higher rates (10-12.5lbs per 1,000 sq ft) may be applied on heavy clay or sodium-affected soils.
- Apply with a broadcast spreader.
- Water in after application to activate soil integration.
- Safe to apply any time of year.
Granular Gypsum + Humic Acid improves soil performance at the foundation — creating better structure, better rooting, and better results.
| Key | Value |
|---|---|
| Active Ingredient | Calcium (Ca) .............. 20.8% Sulfur (S) .................... 15.8% 15.8% Combined Sulfur (S) Derived From: Calcium Sulfate ALSO CONTAINSNONPLANTFOOD INGREDIENTS Soil amending Guaranteed Analysis Active ingredients: 1.2% Humic Acid derived from Leonardite nutrient complexing agent) 4.6% Lignin Sulfonate (water soluble binder) |
| Lawn Types | Tall fescue, Bermuda, Zoysia, St. augustine, Centipede, Kentucky bluegrass, Ryegrass |
| Special Features | 200X more soluble than limestone |
| Application Rate | 5 lbs. per 1,000 sqft. at minimum rate 10-12.5 lbs. per 1,000 sqft corrective rate |
| Time to Apply | Spring, Summer, Fall, Winter |
| Delivery System | Granules |
| Brand | Lawn Synergy |
| For Use In | Turf Grass, Landscape Beds, Vegetable Gardens |
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Choose OptionsOverall rating: 5.0 / 5 from 2 reviews.
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"I can say that the help I received from Tony and Peter was exceptional. I had many questions they had the answers. I called several times and had to leave a voice mail when there was no answer and my call was returned in just a short matter of time. That is the way to do business. As far as results of the product I spread I can’t comment on that because I have Bermuda and not growing yet. I will say according to the reviews I read on their website I do expect good results. Great customer service"
Q&A
- How many 50lbs bags will I need to do 1/2 acre?
- Suggested rate for corrections is 10-20 lbs. per 1,000 sqft. The minimum rate is 5 lbs. per 1,000 sqft.