“…From the outset, the team was encouraged to view the co-design process as a series of steps, each building on the other, and each bringing land managers along on a codesign journey. Three steps or phases of codesign occurred between 2018 and 2021, each of a year in duration, following funding cycles (Ambrose-Oji et al, 2021;2019;2020). Each phase began by engaging and building relationships with land managers through a process of understanding their lived experiences dealing with tree pests and diseases, learning more about how they did or did not act in response and how their actions were related to the current tree health policy mechanisms.…”