Perlite for mixing with Plumeria soil or for rooting cuttings. Coarse structure for even better air permeability of the soil and reduction of rot formation due to waterlogging. This is special gardening perlite without chemical additives. It can be used without concern. Please note the processing instructions!fine-grained0-1mm grain sizeIMPORTANT NOTE When processing perlite, it is advisable to moisten the perlite with water beforehand or to wear a dust mask, as the fine dust can be inhaled through the nose and mouth and then settle in the lungs.