Made by nature, mined by ICL. Polysulphate® is a naturally occurring mineral fertilizer, polyhalite, mined exclusively by ICL. Available as a granule, sphere, or powder, it is soluble, plant-available, and easy to blend and spread, making it a cost-effective sulfur solution.
Deposited in the earth 260 million years ago, each Polysulphate granule naturally contains Sulfur, Potassium, Calcium and Magnesium – four of the six essential macro-nutrients required for optimal plant growth. Since 2010, hundreds of field trials have been conducted worldwide demonstrating Polysulphate’s efficacy in improving both crop yield and quality.
Polysulphate—a better source of Sulfur
As a naturally occurring sulfate-based multi-nutrient, polyhalite, Polysulphate requires no chemical separation or industrial processing, delivering high agronomic value for low environmental impact. Providing a season-long source of plant-available nutrients, Polysulphate’s gradual release pattern safely meets peak plant demand and improves nutrient use efficiency while reducing risks of leaching. It is proven to produce a healthier and more productive crop across a wide variety of soil types. Low-chloride, low salt index, neutral pH and no liming effect make it a safe choice even for sensitive crops.
Natural, certified-organic, low carbon footprint.
Polysulphate is a natural product with a low carbon footprint, licensed for use in organic farming systems. Polysulphate sets the standard in environmental sustainability among fertilizers, with Polysulphate Standard, and Granular having the the lowest carbon footprint (compared to similar products) of just 0.0029 kilograms of CO2 equivalent per kilogram of product. Polysulphate is suitable for organic farming systems and is approved for organic use by several certification agencies around the world, including Ecocert, Ceres, and OMRI.
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Frequently asked questions we received from farmers
All nutrients are in sulphate form.
Polysulphate is produced from a natural mineral called polyhalite, which is an evaporite mineral, a hydrated sulfate of sulfur, potassium, calcium and magnesium.
It is mined from the Polyhalite layer of rock, over 1000m below the North Sea, off the North Yorkshire coast in the UK. Polyhalite undergoes a simple process of crushing and screening the rock and is then marketed as Polysulphate.
Polysulphate is available in its natural form. Preparing it for the market as Polysulphate involves no chemical separation or other industrial processes – it’s completely natural, organic and sustainable. Polysulphate has been approved by many global and national bodies for organic use.
Polysulphate dissolves steadily in the soil solution, thus having all nutrients available for plant uptake during the growth period. Being a natural crystal, it has a unique dissolution pattern, which releases its nutrients gradually after being applied to the soil. The prolonged release characteristic of Polysulphate means that as the four nutrients it contains are released, and they provide a continuing continuous, fresh source to the growing crop. This pattern matches the uptake timing of nutrients by the crops and minimizes the risk of loss of sulphate by leaching.
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