Retains moisture and prevents weed growth. - Significantly reduces the germination and development of weeds in the substrate. - Limits evaporation and reduces the consumption of irrigation water during the summer season - Average duration: 2 to 3 years. - Place the disc on top of the substrate when filling the pot. To prevent the disc from moving, place it inside the jar. Diameter: 55 cm Made: 100% Jute fiber