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