In organic farming, plants should primarily be fed through the soil ecosystem, therefore fertilisation focuses on feeding the soil life. Organic farmers rely on biological nitrogen fixation by legumes, complemented by recycling, regeneration and/or addition of organic materials and nutrients. Among the external inputs used for organic plant nutrition, manures from non-organic farms and rock phosphates are considered the most problematic due to contaminants, the usage of non-renewable sources as well as the structural dependency on conventional farms. Reducing their use is challenging because on the one hand it could increase the risks of mining the soil – especially in stockless farms – and on the other hand, it would further reduce the productivity per area. The RELACS project has contributed to open pathways to alternative sources of plant nutrition needed to reduce the dependency on contentious fertilizers and manures in plant production. To do so, RELACS has analysed opportunities for new technologies to recycle nutrients from waste streams for organic agriculture, focusing on three recycled inputs: struvite, anaerobic digestates and calcined sewage sludge ash. The analysis of RELACS were presented to relevant stakeholders of the organic sector and to EU policymakers, in order to assess their acceptability of the recycled inputs and to identify under which conditions they could be adopted. This multi-actor approach and fact-based dialogue allowed to develop a “European roadmap for phasing in new nutrient sources in organic farming systems”, with the aim to propose fair, reliable and implementable rules to achieve an identified realistic integration of new recycled inputs into organic nutrient supply strategies.