The ambition of this programme is to enable the widespread adoption of ground-breaking solutions to bring back nature in cities. Natural Grass offers disruptive solutions for urban greening:1. AirFibr, the sports field application for football and rugby pitches, golf courses and horse-riding grounds2. CityNest, the green building solution for green walls and green buildings3. GreenMove, the future of urban infrastructure : green parking slots, green tramway track beds, green highway sound wallsThis programme aims at removing an important lock for Natural Grass: the mastery of its production process in orer to overcome the following limitations:- Flexibility: It only works with a very precise set of components- Control: Designed to produce the AirFibr substrate, the current line does not allow to vary the cork/sand/fibres ratio over all the range necessary to produce the substrate for CityNest and GreenMove, hence the substrate has to be manually enriched in cork- Reproducibility: a minor change in the process parameters or in the components characteristics can cause the process to failTo achieve these ambitious objectives, we propose an innovation programme structured in three steps:I. A study of the current process to formalize and generalize Natural Grass technical know-howII. The development of a set of innovative tools necessary for multiple substrate fabrication testsIII. The completion of the final objectives: the development of a fully functional prototype line and of a wider range of appropriate substrate constituents.