A spin-off from Ghent University is in development to provide farmers with real-time, in-field nutrient analysis of crops. Using advanced light-based sensor technology, we measure the interaction of light with leaf surfaces to detect nutrient imbalances before visible symptoms occur. This innovation aims to revolutionize fertilization decision-making, enabling precise and proactive nutrient management. Building on a successful proof-of-concept in Champagne vineyards, this project adressess key questions, such as how farmers can optimize fertilization to achieve specific quality traits like acidity or phenolic compounds. Additionally, the project will expand the technology’s application to a new crop, further enhancing the potential of the future startup. Finally, we will establish a strong connection with multiple potential customers, using their feedback to optimise the interface that will eventually inform their decissions.