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The four-in-one natural fertilizer

The only 4-in-1 fertilizer to provide a natural, season-long source of sulfur, calcium, potassium, and magnesium in one balanced granule.

Made by nature, mined by ICL. Polysulphate® is a naturally occurring mineral fertilizer, 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.

Polysulphatea 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.

Polysulphate is a natural product with a low carbon footprint, licensed for use in organic farming systems.

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Benefits

  • Four essential nutrients in one application: reduces storage and handling, improves blend and spreadability

  • Flexible solution: available as powder and granules; Suitable for all kinds of crops and soils

  • Superior season-long release: extended nutrient availability, with fewer sulphate losses through leaching

  • Plant-available: all nutrients available for uptake in sulphate form

  • Safe: low chloride, neutral pH, low salinity index

  • Proven results: superior yields, improved plant quality, plus bigger profits

  • Helps improve soil structure, root development, water infiltration, and seed emergence

Product range

Product name
N
P2O5
K2O
More nutrients
Longevity

Polysulphate Premium

Polysulphate® Premium consists of uniform, robust spheres of Polysulphate®, whose smooth surfaces protect it from abrasion, humidity, and damage. Its spherical shape ensures a steady flow rate and a consistently broad spread during application. It blends with other granulated fertilizer materials.

Polysulphate Granular

Polysulphate® granules for direct application with spreaders and bulk blending.

Polysulphate Standard

Polysulphate® standard is a fine grade ideal for NPK granulation and designed for direct manual application.

Guides & Articles

Polysulphate - from polyhalite to fertilizer and mine to fields
Video

Polysulphate - from polyhalite to fertilizer and mine to fields

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Q&A

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.

Have more questions?
Get in touch with ICL, today!