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The four-in-one natural fertilizer

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 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

  • Available as powder and granules

  • Extended nutrient availability, with fewer sulphate losses through leaching

  • All nutrients available for uptake in sulphate 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

Polysulphate® Product range

Product name
N
P2O5
K2O
More nutrients
Longevity

Premium

Premium: Polysulphate® Premium consists of uniform, robust spheres of Polysulphate®, whose smooth surfaces protects 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.

Granular Polysulphate

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

Standard Polysulphate

Standard: Polysulphate® fine grade has NPK granulation and is designed for direct manual application.

Mini

Mini: The granules are 1-2mm in size, which helps the practical application of Polysulphate®, especially in greenhouses and horticultural settings. It’s easy to apply directly via manual or mechanical spreading, while you can mix it with other fertilizers of a similar size.

Guides & Articles

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 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 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 sulphate by leaching.

If you have more questions we are happy to help.

Contact us