Urban ecological governance is increasingly shaped by policies and planning concerning biodiversity, invasive species and climate adaptation. However, these formal objectives do not directly determine what urban nature becomes in practice. They have to be interpreted and enacted through everyday maintenance work. This thesis investigates how urban ecological governance is enacted through the everyday labour of municipal land management in Malmö. It focuses particularly on the relationship between formal ecological governance and the everyday decisions and practices through which urban green spaces are maintained and produced. The study uses a qualitative case study approach, combining autoethnographic participant observation with three semi-structured interviews. The autoethnographic material was gathered through several months of work within a municipal perennial gardening group in Malmö. Interviews were conducted with professionals working with different aspects of ecological planning, management and maintenance. This empirical material was also considered alongside municipal documents and national and European policy and guidance relating to ecological management and invasive species. The findings are organised around three main themes: interpretation, negotiation, and practical knowledge, discretion and material constraints. The study finds that ecological policy does not arrive in practice as a complete set of instructions. Instead, maintenance workers continuously interpret ecological objectives according to the specific conditions they encounter. Everyday maintenance also involves negotiations between different and sometimes competing demands, including biodiversity, aesthetics, public expectations, invasive species management, climate resilience and practical feasibility. Practical and situated knowledge therefore becomes important in determining how ecological objectives are carried out. At the same time, workers' discretion is shaped and limited by regulations, resources, organisational structures and the material conditions of maintenance work. The thesis argues that municipal maintenance workers should not be understood simply as implementing ecological governance decided elsewhere. Through everyday interpretations, negotiations and practical judgements, they actively participate in producing urban nature and in giving ecological governance its practical meaning. The gap between formal policy and everyday practice is therefore not necessarily only a failure of implementation. It is also a space where ecological governance is adapted, negotiated and made workable. By focusing on everyday maintenance labour, the study contributes to an understanding of urban nature as something continuously produced through both governance structures and the situated practices of those who maintain the city.