BioSoilutions Report on Key Challenges, Stakeholders, and Engagement Plans The BioSoilutions project is dedicated to transforming underutilised biowaste feedstocks into safe and market-ready soil improvers. This report highlights the key challenges and opportunities within the biowaste soil improvers market and outlines strategic stakeholder engagement plans. By bringing together a diverse group of partners, including researchers, farmers, and policymakers, the project fosters collaboration and innovation. Through the establishment of Living Labs in Valencia, Murcia, and Flanders, stakeholders are actively involved in co-creating, validating, and testing biowaste-derived soil improvers. These efforts aim to ensure that the solutions developed are not only technically viable but also socially and economically sustainable, paving the way for widespread adoption.