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Polysulphate™ from Cleveland Potash is a new naturally occurring mineral fertiliser containing the sulphates of potassium, magnesium and calcium. It is a complex crystal product which has been discovered at a depth of 1300 metres in the Cleveland Potash mine in the UK and is found in few other places in the world.

Polyhalite (marketed and referred to by ICL as PolysulphateTM) is a natural occurring mineral comprising hydrated sulphates of K, Ca and Mg. The name polyhalite comes from the Greek words “poly” and “halite” which means “many salts”, referring to the complex composition of the material.

  • Concentrated sulphur source for low application rates
  • Readily available sulphur plus potassium and magnesium
  • Naturally occurring UK product

Mined in the UK, ICL is the first – and only producer –in the world to mine polyhalite, marketed as Polysulphate™.

Nutrients are fully available to plants

Extensive trial work has confirmed that the principal nutrients of sulphate, potash and magnesium in Polysulphate are fully available to plants, performing in trials with the same plant-efficiency as standard sources of potassium and magnesium sulphate.

Polysulphate is available as a 2-4 mm granular fertiliser product which can be applied as a straight fertiliser or can be used in blends. Polysulphate is also available as standard grade, ideal for use in compound fertiliser manufacturing.

Polysulphate has these minimum contents of:

  • Sulphur 48% SO3 as sulphate
  • Potassium 14% K2O as from potassium sulphate
  • Magnesium 6% MgO as from magnesium sulphate 
  • Calcium 17% CaO as from calcium sulphate 

Polysulphate is a low chloride fertiliser, and being a natural product and being a natural product (Polyhalite) with no chemical processing makes it suitable as an organic source of nutrients. 

For more info:

Business Units
Cleveland Potash
General Specifications / Typical Properties
Product CategoryPolysulphate
Nutrient Composition0-0-14-48SO3-6MgO-17CaO
NutrientsK S Mg
Terms Of Use