The Science Behind Nature's Most Complete Agromineral
Born from the Sudbury Event, SRC is a no-pyrochlore mineral — no radioactive accumulation, low cadmium (0.197 ppm) — one of the cleanest carbonatites available.
Composition of SRC
A naturally diverse magmatic blend — each mineral fraction contributes a distinct role in soil health.
Naturally harbors 10+ beneficial microbial species — Arthrobacter, Pseudomonas, Streptomyces, Bacillus, Paenibacillus, and others.
Nature didn't design soils around a single nutrient.
Neither does SRC.
Science-Approved. Research-Backed.
Spanish River Carbonatite supports healthier soils through improved soil chemistry, mineral availability, microbial activity, and root development. Explore the science behind its proven benefits.
Healthy Soil Starts With a Healthy Microbiome
SRC naturally contains 10+ beneficial microbial species, making it more than a multi-mineral soil amendment. Together with its diverse mineral profile, these microorganisms help re-populate depleted soils, support a healthier soil microbiome, and contribute to long-term soil health as part of a balanced fertility program.
Beneficial microorganisms are essential to a thriving soil ecosystem. They help release nutrients from minerals, recycle organic matter, improve soil structure, and support root development — all while contributing to a balanced and biologically active rhizosphere.
More Than Lime. More Than Fertilizer.
For decades, soil amendments have largely focused on solving one problem at a time — raising soil pH, supplying calcium, or adding individual nutrients. Spanish River Carbonatite takes a fundamentally different approach.
Rather than delivering a single benefit, SRC combines a naturally diverse mineral profile with beneficial microbes to support healthier soil chemistry, active soil biology, stronger root systems, and long-term soil health.
Calcium + Much More
Calcium is only one part of the story. While SRC is rich in highly reactive igneous calcite that helps buffer acidic soils, it also naturally supplies phosphorus, potassium, magnesium, silica, high-activity clay minerals, and more than 60 trace elements.
Healthy soil requires more than one ingredient. Discover how Spanish River Carbonatite combines minerals, microbes, and nearly 30 years of research to support healthier soils from the ground up.
30+ Years of Research
Root Growth
Statistically significant improvements in root length, root volume, root surface area, and root diameter when SRC was incorporated into growing media.
Early Emergence
30 vs 18 potatoesImproved early plant development across multiple crops and growing media. Enhanced root establishment and balanced mineral nutrition helped create conditions for more vigorous early growth.
30 potatoes on 5 plants (SRC) VS
18 potatoes on 5 plants (no SRC)
applied at 1,200 lbs per acre
Carrot growth — with SRC vs without SRC
Compost Performance
Accelerates biological activity while enriching finished compost with valuable minerals, alongside significant reductions in copper and nickel concentrations.
Potting Mix Studies
Independent trials consistently demonstrated stronger plant growth across commercial growing media, even at small inclusion rates.
Scotts Premier Pro
Fafard Agro Mix
Certified for Organic Growing
Trust science. See the results.
Browse our complete library of independent research, university studies, and field trials that continue to validate the benefits of Spanish River Carbonatite across multiple crops and growing environments.