The current shift in agricultural practices focuses on utilizing resources sustainably in their purest form to minimize production wastes and maximize nutrient use efficiency. Rock Phosphate, used in it’s natural form optimizes the use of this limited resource. Without chemically altering this agricultural resource, Phosul uses innovative technologies to enhance Rock Phosphate’s inherent properties through blends with natural nutrients that synergize with phosphorous in the soil to optimize plant use.

Phosul represents a unique fertilizer that improves the liberation of phosphorous and calcium from rock phosphate. Enriched with phosphorus, calcium, sulfur, and silica – Phosul significantly contributes to robust plant health and vitality.

While phosphorus and calcium are major nutrients required in abundance in the soil and provide known plant and soil health benefits, the importance of Sulfur and Silica should also be stated:

Sulfur is plant-essential for:

  • chlorophyll production
  • amino acid synthesis
  • improved nutrient uptake, especially phosphorus
  • better root development
  • plant strength and resilience

Sulfur is soil-essential for:

  • optimizes pH in alkaline soils
  • improves nutrient availability
  • formation of stable soil aggregates
  • improves biological diversity

Silica is essential for plant vigor:

  • improved cell wall strength
  • increased resistance to pests and diseases
  • ability to withstand abiotic stresses (drought, heat, nutritional imbalance)

Enhanced Rock Phosphate Fertilizer

The Phosul formulation was scientifically created and rigorously tested with the help of experienced researchers, agronomic professionals, and The Montana State University. The most efficient formulation yielded 16% Total Phosphate, 4% Sulfur, 16% Calcium, and 7% Silicon Dioxide. The Phosul nutrient combination has shown tremendous crop growth and yield increases in the field and greenhouse on various crops and soils including broad acre field crops, horticulture, turf, and ornamentals. It can be purchased bulk or in bags and comes in a pelletized form that easily spreads using modern agricultural equipment.

Lower Carbon Footprint

In recent years, there has been an important global shift towards reducing carbon footprint, particularly in agriculture. Phosul understands the importance of using phosphate resources in their natural state and their benefit when used with essential plant nutrients such as sulfur and silica. This approach optimizes the availability of important nutrients, including phosphorus, calcium and trace minerals present in rock phosphate. The production of rock phosphate-based fertilizers for agricultural use provides a promising alternative with lower carbon emissions compared to synthetic fertilizers. Synthetic fertilizers typically require energy-intensive processes that contribute to greenhouse gas emissions. A transition to rock phosphate-based fertilizers like Phosul aligns with global efforts to mitigate climate change.

Environmental Benefits

Unlike water-soluble synthetic phosphorus fertilizers that is rapidly lost through leaching, Phosul minimizes phosphate leaching, and encourages efficient nutrient absorption by plants through it’s enhanced composition. Farmers benefit with healthier crops, while reducing environmental impacts caused by phosphate loading into lakes and streams. 

For more information, visit

Photo of turnip plant foliar growth with Phosul (left) and without Phosul (right) in phosphate deficient potting soil. Phosul is showing better growth and insect and aphid resistance.

Turnip from Phosul