Perlite is a volcanic rock that is suitable for use in potting mix, for covering seedbeds, for rooting cuttings, as well as for winter storage of vegetables and flower bulbs, and for drainage in flower pots. Water retention capacity: 97.1%. It improves the structure of the growing medium and increases water retention. By creating a good moisture and air regime in the soil, it reduces the risks associated with both under- and overwatering. By covering the top layer of soil or growing medium for indoor plants with perlite, it is possible to compensate for the lack of light in winter, as light is reflected back from the snow-white perlite and amplifies its actual intensity. Also suitable for use in organic farming.