Polysulphate® is a versatile and valuable source of prolonged release Sulphur (S), containing Potassium (K), Calcium (Ca) and Magnesium (Mg) in soluble, readily absorbed forms.

For arable, dairy, sheep and beef farmers

Who are looking to improve crop yield and quality through a steady supply of crop essential nutrients

Our product is a multi-nutrient granular fertiliser containing 48% sulphur, 14% potassium, 6% magnesium, 17% calcium

Better than other forms on the market as the sulphur is released over a 55-day period, preventing potential leaching losses

Our solution is fully approved for organic use, contains low levels of chloride and has a lower carbon footprint than standard practice

It is tried, tested and proven in the UK and Ireland

Want to know more?

What is Polysulphate®?

Polysulphate® is a unique, multi-nutrient fertiliser containing sulphur (S), potassium (K), calcium (Ca) and magnesium (Mg) in water-soluble, plant available forms. Mined in the UK, Polysulphate® can be applied as a straight or combined into multi-nutrient compounds.

Why use Polysulphate®?

  • Prolonged release rate of sulphate for double the number of days compared to other forms of sulphur
  • Sulphate release matches crop uptake and minimise leaching losses
  • UK mined with low carbon impact
  • Proven quality and yield benefits to increase NUE and crop profit
  • 2 – 4mm granular product with excellent blending and spreading characteristics
  • Can be applied as a straight or in a range of Origin grades for total flexibility
  • Ideal for chloride sensitive crops
  • Fully approved for organic use

See why Polysulphate is ideal for combining peas 

Need trial data?
New brand Polysulphate Winter Wheat starter fertiliser 2019 trial data sheet


Assessing the effect of Polysulphate as an application for winter wheat

New brand Polysulphate combining peas trial data sheet


Investigate the effect of different rates of Polysulphate on combining peas on a sandy clay loam soil



Assessing the benefit of Polysulphate in a maize starter fertiliser



Assessing the effect of autumn and spring applications of sulphate for oilseed rape

New brand Polysulphate trial results Grass DM trial data


Comparing NPK plus ammonium sulphate with NPK plus Polysulphate on grass

Product Range
POLYSULPHATE is a key source of sulphur in many of our NUTRI-MATCH blends
POLY-MOLY 0-0-14 + 48% SO3, 17%CaO, 6%MgO, 0.02% MoCombined with MICRO-MATCH Molybdenum
POLY-Manganese 0-0-14 + 48% SO3, 17%CaO, 6%MgO, 0.03%MnCombined with MICRO-MATCH Manganese
Polysulphate14K 6Mg 48S 17Ca
PotashpluS37K 2.8Mg 23S 8Ca
27-0-8 + 5SO3 + 0.5MgO + 2CaOA standard Polysulphate grade
15-15-15 + 10SO3 + 1MgO + 3.5CaOA standard Polysulphate grade
20-10-10 + 7.5SO3 + 1MgO + 2.5CaOA standard Polysulphate grade
25-5-5 + 7.5SO3 + 1MgO + 2.5CaOA standard Polysulphate grade
GU 33-0-5 + 14SO3 + 2MgO + 5CaOA standard Polysulphate grade
0-16-24 + 16SO3 + 2MgO + 5.5CaOA standard Polysulphate grade
0-20-20 + 14.5SO3 + 2MgO + 5CaOA standard Polysulphate grade
0-24-24 + 5SO3 + 0.5MgO + 2CaOA standard PotashpluS grade
0-20-30 + 5SO3 + 0.5MgO + 2CaOA standard PotashpluS grade
In addition to our standard Polysulphate grades we produce prescription grades - combinations of major, secondary and micro nutrients tailored to meet specific soil and crop requirements at individual field level. Learn more about NUTRI-MATCH
Need More Technical Information?

Why is Polysulphate® a good source of sulphur? 

Polysulphate™ releases sulphate for double the number of days compared to other forms of sulphur. An independent trial by the University of Nottingham compared the nutrient release pattern of various sulphur fertilisers. Polysulphate gave the most prolonged release of plant-available sulphur - up to 50 days post-application – which gives the best match with the rate of crop uptake and minimises the risk of leaching.

How available to plants are the nutrients S, K, Mg and Ca in Polysulphate®?

All the nutrients are fully available to plants.

Is Polysulphate® fully soluble?

Yes, Polysulphate is fully soluble.

Considering the slower rate of dissolution of Polysulphate® in water, are the nutrients released sufficiently to plants?

Yes, we do not see a lesser uptake by plants, even in small plots, where flow of nutrients is relatively higher than soil.

Is Polysulphate® only available as a straight?

No, we supply Polysulphate® in a wide range of prescription NS, NPKS and NKS blended compounds. An example of some of the grades are below.


Need a Carbon Footprint?
Our aim is to provide specific carbon footprints for our products, improving accuracy for recording and reporting. NUTRI-CO2OL, our independently ADAS verified carbon footprint model, was developed to account for changes in raw material sourcing, production and blending sites.
Need Help to Set Your Spreader?

Spreader settings for granular Polysulphate® fertiliser are available from most manufacturers of centrifugal spreaders.

Tables are available on the websites of these companies:


We produce hundreds of different prescription analyses that contain Polysulphate® across our 12 sites.

Our rigorous checks on raw materials enable us to provide some important indicators about the Polysulphate blend to help guide you when setting your spreader. 

Contact us for details about your specific Origin grade. 


Spreader setting

Origin 27-6-6+15SO3 made with Polysulphate


Spreader setting

Origin 31-0-5+16SO3 made with Polysulphate


Spreader setting

Origin 20-10-10+9SO3 made with Polysulphate


Spreader setting

Origin POLY-CAN 23-0-2 + 7SO3 + CaO + MgO