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  2. ICL
  3. Agriculture
  4. Brands
  5. Polysulphate®

The four-in-one natural fertilizer

On this page:

Polysulphate® is a new 4-in-1 natural fertilizer for improved crop yields.

Mined in the UK in its natural crystal state (polyhalite), Polysulphate contains four nutrients: sulfur (S), potassium (K), magnesium (Mg), and calcium (Ca).

Being a natural crystal, Polysulphate has a unique dissolution pattern that releases nutrients gradually after application. This prolonged availability reduces the chance of nutrient losses while also matching the uptake requirements of crops.

Polysulphate stands out as an eco-friendly choice for farmers due to its natural composition and exceptionally low carbon footprint. Polysulphate sets the standard in environmental sustainability among fertilizers, with Polysulphate Standard, Granular, and Mini having the lowest carbon footprint (compared to similar products) of just 0.029 kilograms of CO2 equivalent per kilogram of product.

Polysulphate is suitable for organic farming systems and is approved for organic use by certification agencies around the world, including Ecocert, Ceres, and OMRI.

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Benefits

  • Four essential nutrients in one application

  • Available as powder and granules

  • Extended nutrient availability, with fewer sulfate losses through leaching

  • All nutrients available for uptake in sulfate form

  • Suitable for all kinds of crops and soils

  • Low chloride

  • Neutral pH

  • Low salinity index

  • Completely natural product with a low carbon footprint

  • Polysulphate® has organic agriculture approval

  • Superior yields, improved plant quality, plus bigger profits

  • Concentrated with low storage needs, and easy to spread

Trials with Polysulphate

China Black Pepper Trial

Gia Lai province, Central Highlands, Vietnam, 2017

147 Yield Increase

Alfalfa with Polysulphate

Vésigneul-sur-Marne, France, 2020

12 Yield increase

Tea with Polysulphate

Lam Dong district, Vietnam, 2015

15 Yield Increase

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Guides & Articles

Polysulphate - from polyhalite to fertilizer and mine to fields

Polysulphate - from polyhalite to fertilizer and mine to fields
Video

Polysulphate - from polyhalite to fertilizer and mine to fields

Video

Polysulphate - from polyhalite to fertilizer and mine to fields

Q&A

Frequently asked questions we received from farmers.

All nutrients are in sulfate 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 and 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 sulfate by leaching.

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