agriculture

search
Brands
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Crops
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Knowledge Hub
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Trial Results
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Popular categories
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Popular brands
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Knowledge Hub
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Growing Media
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Our controlled release fertilisers
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Our water soluble fertilisers
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Other categories
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Crops
Product finder

Do not know which product is right for you? Try our matching calculator

Find product
Knowledge Hub
Product finder

Do not know which product is right for you? Try our matching calculator

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

The all-year-round sulphur fertiliser of choice with a low carbon footprint

On this page:

Have a question, or need more information?

Polysulphate® multi-nutrient sulphate fertiliser

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.

thumb

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

Trials with Polysulphate

Cabbage & Polysulphate

Lincolnshire, UK, 2017

40 Yield Increase

Vining Pea & Polysulphate

Lincolnshire, UK, 2018

23.5 Yield Increase

Wheat with Polysulphate

UK, 2018

5.4 Yield Increase

View all trials

Product range

Viewing 0 of 0
Load more products

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

Article

Polysulphate reducing sulphate leaching

Article

Polysulphate™ grass trials show 29% yield increase

Article

Polysulphate autumn application increases nutrient efficiency

Article

Boosting Brassicas with Polysulphate

Recommended crops

Everything you need to know about alfalfa fertilization, best practice, suitable products, field trials and more.

Complete guide to Alfalfa

Everything you need to know about carrot fertilisation, best practice, suitable products, field trials and more.

Complete guide to Carrots

Everything you need to know about grass or grass-clover mixture fertilisation, best practice, suitable products, field trials and more.

Complete guide to Grass

Everything you need to know about fertilising potatoes, best practice, suitable products, field trials and more.

Complete guide to Potato

Everything you need to know about wheat fertilisation, best practice, suitable products, field trials and more

Complete guide to Wheat

View all crops

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 sulphate of sulphur, potassium, calcium and magnesium.

It is mined from the Polyhalite layer of rock, over 1000m below the North Sea, off the North Yorkshire coast. Polyhalite undergoes a simple process of crushing and screening 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 minimises the risk of loss of sulphate by leaching.

If you have more questions we are happy to help