Green infrastructure planning has come a long way in the North West of England over the past ten years. In this time, it has developed from a largely unknown term to one embedded in policy, with a robust evidence base and tools to support the concept, examples of plans and strategies, and delivery funded through non-traditional sources. This chapter explores this journey, told from the perspective of The Mersey Forest, which has been a key champion of the agenda in the region. As such, the focus is primarily on work that it has been involved with. The chapter draws out the relevance from The Mersey Forest’s experience to the strategic planning of green infrastructure elsewhere.