Potassium humate - Powder

Potassium humate is a soluble product. This product is created by treating the insoluble product Leonardite with potassium sulphate. Potassium humate has the same effect as Leonardite and can be sprayed on the crops to stimulate plant growth. Potassium humate contains humic acids (humic and fulvic acids). These humic acids have a very positive influence on the development of soil life which results in making nutrients (including phosphates) from the soil more available to the plant.

Leonardite also has a high CEC (cation exchange capacity) complex which ensures that nutrients remain available in the soil for longer. As a result, less nitrogen leaching will occur. Leonardite must be applied before planting or seeding. Potassium humate can be applied repeatedly during the growing season in small quantities, along with crop spraying treatments. Potassium humate therefore also improves the plant's root formation, allowing the plant to absorb more moisture and nutrients.

ProductPotassium humate
Moisture binding++
Ion exchanger +++
Soil improver +++
Nutrient supplier++

Poortershaven: Know-how

Poortershaven continuously develops new applications for the use of clay and rock minerals in the agricultural sector. This has resulted in well-known and frequently used products for animal health, soil improvement and animal bedding hygiene.

The colour of the products may differ in real life, due to the sharpness and screen settings. If desired, we would be happy to send a sample.

Broad product portfolio

Poortershaven offers a wide range of products. This means that within a product range you will always find a form that suits the intended use and/or technical installation.

Continuously innovating

We collaborate with universities and research institutes, among others, to test our products and their applications and to generate knowledge about optimal use.

Product knowledge

Through long-term relationships with our suppliers, we supply reliable and stable products. Along with our suppliers, we have a lot of in-house specialist product knowledge.


We know our products and would be happy to get in touch with you. We are happy to share our knowledge about our products with you, enabling us to jointly find an appropriate solution for your problem.


If you have any questions about our range, prices or current stock, if you would like advice, or if you would simply like to touch base with us, please contact us.

We look forward to assisting you.

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For more information and current prices, please feel free to contact one of our employees.

Call +31(0)10 4365755 or mail info@poortershaven.nl