Very good water retention and capillarity · Stable structure, purely mineral · Supports the gas exchange from substrate to the root · Perfect drain properties to prevent root rot · Ideal for hydroculture and roof planting · Frost and weather resistant · Does not rot or compress · Further grain sizes and packing sizes available on request (e. g. bags, big bags or bulk) Minimum order unit for expanded clay: ex works= 1 pallet · ex warehouse Willich = 1 bag (Lamstedt-Ton only) · Please ask for pricing