Perlite

Perlite is a mineral of volcanic origin , mainly silicates, which expand more than twenty times their original volume when they are warmed up until this point of softening. This process of expansion is caused by the water presence within the crude mineral. When this is warmed up approximately to 900º C, the water is vaporized and forced the softened mineral to expand. This way, small volcanic glass bubbles take place, responsible for the exceptional properties of expanded perlite. It provides ventilation and lightness to the soil.

Recommendations of use
Apply in proportion 1/6.