What are additives and why are they significant?

We distinguish between mineral and organic additives and here are the most important ones: Perlite, clay, expanded clay, pumice (Italy), coco fiber and compost among others.

Depending on their characteristics, they fulfill different tasks. For example, perlite, vermiculite or pumice are used for structural enhancement and to improve the air and water holding capacity (capillarity). Clay minerals (three-layer clay minerals) store nutrients particularly well. Coco fibers improve the water supply. Green waste is used mainly for organic and peat reduced soils. Styro waste, fibrous wood materials, rice husks, and flax shives play only a subordinate role.