The chapter traces the history of how physicians began prescribing time in nature. Steps in developing a campus-based Nature Rx program include: organizing a committed group with broad representation across campus, securing support among top administrators, inventorying available green spaces, engaging students, intentionally partnering with health and counseling services, developing easily usable apps and/or websites, cultivating relationships with relevant academic programs, developing an approach to effectively evaluating the program, identifying challenges, and finally modelling the desired behavior around time in nature.