Achieving the benefits of health research is restricted by the slow uptake of research and innovation into clinical and organisational practice. In this project we will work in an existing partnership with Valley Primary Health Organisation and Hutt Valley District Health Board to investigate the adoption and implementation of a new NZ-based Toolkit for primary mental health care development. Using an explanatory case study design, we will determine the structural and non-structural characteristics of the organisations that influence adoption and implementation, and whether or not adoption of the Toolkit leads to any measurable changes in service provision or use. We will also assess the sustainability of the Toolkit use and the transferability of our findings to other health contexts. The project focuses on several of the priorities of the RPNZHD RFP, namely decision-making at the systems level, service accessibility, health sector performance and sustainability, and workforce capacity and capability.