In the context of the agroecological restoration, exploiting soil biodiversity is the top priority for reducing crop dependence on chemical inputs. Focusing on mycorrhizae, scientists Chave et al. elaborated a methodological framework for designing efficient agrosystems. This method reveals various constraints and levers. It fosters local innovation and develops both systemic reasoning and collective actions. Such a global approach allows farmers to understand that all of them are potential “mycorrhizae producers”.