This project, funded by the EU's Horizon 2020 program, aims to enhance water and nutrient use efficiency in soilless crops through pilot projects demonstrating closed recirculation systems, evaluating drainage treatment technologies, and improving irrigation management. Participants from various European countries contribute to research on precision irrigation, nutrient solution management, and methods for reducing nitrate leaching. The goal is to showcase innovative practices that promote sustainability in horticultural practices, particularly in Mediterranean regions.