Perlite is baked volcanic rock that provides an airy substrate and improved drainage. Use Perlite to improve the structure of the soil. Perlite can be broadly used. It has a consistent quality, is germ-free and provides the ideal water / air ratio. Perlite stimulates root development. The product carries the RHP quality mark. Dosage and use Mix 10 - 35% Perlite into the soil. Characteristics 100% perlitepH (H2O) 6.5 – 8.0EC [mS/cm] 0.0 – 0.1granule size [mm] 0 - 6 Packaging10 L & 60 L bag. The advantages of Perlite High water and oxygen holding capacity. Consistent quality and germ free. Provides an ideal water/air ratio. RHP quality mark. Tips from Plagron Perlite can also be used as a hydrological substrate. Creates root space under a tray of cuttings. Perlite is an ideal supplement with every soil mixture from Plagron.