® : THE raw material!

A source of minerals: potassium, calcium and sulphur!


Haspargit® is a powdered precipitated double salt of potassium sulphate and calcium sulphate obtained by depotassifying the vinasse obtained from the production of citric acid through fermentation of the sugar left in beet molasses. The potassium contained in Haspargit® comes entirely from the beets. Haspargit® is approved for use in organic agriculture.

Haspargit® has based its reputation on the growing of potatoes thanks to its effects on quality and yield. Potassium sulphate is a very attractive fertilizer for it is suitable for all types of soil and kinds of crops. Its low salt index makes it interesting for high-doses applications and for rotating heads. It is also very suitable for crops requiring fairly great amounts of sulphur as well as for chlorine-sensitive crops such as potatoes.

Thanks to its contents in potassium (22% K2O), calcium (10% CaO) and sulphur (30% SO3), Haspargit® alone provides 3 of the 7 essential elements for plant growth and yield. These three elements (K, Ca, S) also directly determine the quality of plants.



Just a few reminders …



Potassium is a key plant element. With contents from 2% to 5% of the dry matter in plants and fulfils different functions:

  1. Better resistance to drought
  2. Important role in photosynthesis : stimulates the synthesis of carbohydrates and amino acids in leaves and contributes to the migration and accumulation of these substances in the reserve organs (important for potatoes, beets, vegetables, ...)
  3. Effects on the thickening of the cell walls and on the mineral content of the sap which increases resistance to cryptogamic diseases and frost.


Due to the increase in yields and less atmospheric sulphur fallout, sulphur deficiency sometimes appear which is a major yield limiting factor. This is easily remedied with a maintenance dose of sulphur fertilizers such as potassium sulphate. This evolution allows us to say that sulphur, as a secondary fertilizing element, progressively becomes the 4th major element beside nitrogen (N), phosphorus (P) and potassium (K).

Sulphur is an essential component of many proteins. It is one of the components of sulphur-containing amino acids viz. cystine and methionine. Sulphur deficiency results in slowing down leaf growth and protein synthesis.

Good to know ! Providing too much chlorine and not enough sulphur damages the crops. Reversely, a chlorine deficiency or an excess of sulphur will not do any harm. 300 units of potassium from Haspargit provide less than 1 kg of chlorine per hectare.



Calcium is a key element for the cell walls in plants. It is indispensable for their growth and stimulates root development. Calcium also contributes to a better storage of potatoes. Due to the important part it plays in cell division and cell walls stability, calcium gives cells a better resistance to stress, parasites and cryptogamic diseases. It also reduces the rot risk during storage. Calcium is an essential element in potato cultivation. Haspargit® contains 10% of CaO in the form of sulphate and provides the plants with directly available calcium without extra neutralizing values (1 tonne of Haspargit® = 100 CaO units).

Read also: Liming materials