Vermiculite 1L is a naturally soft and porous material obtained by mica expansion. Vermiculite has high cation exchange - this helps in the gradual release of nutrients - potassium, calcium, magnesium, iron, silicon and other trace elements. Holds up to 4 times more water while protecting the roots from rot. Absorbs excess fertilizers and additives, then gradually gives them away. Improves aeration and drainage features of soil. Perlite "loves" the air, and vermiculite - the water. It is suitable for potting substrates
