Lava Grit - Different Forms

Lava is a younger volcanic rock, such as Diabase and Basalt, which is formed by volcanic eruptions on the earth's surface. Lava contains many trace elements and rapidly soluble silicon. Because it is mined more at the surface it also contains more contaminants and certain easily soluble parts have been weathered or washed out by sedimentation. Lava definitely also has an effect on the strength of plants, making them less susceptible to diseases and pests. As the silicate crystals have a large surface area, Lava has a positive effect on the CEC content of the soil, resulting in better retention of fertilisers.

Lava comes in different forms, from lava grit to lava flour.

ProductLava Grit
FormLava grit/lava flour.
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