This study aims to provide foundational data for developing forest therapy programs to improve mental health conditions by reviewing program development studies, casebooks published by governmental organizations, and existing programs conducted in forest therapy settings and analyzing the status and activities of programs from various disciplines in Korea and abroad. During the collection phase of mental health improvement programs, studies that were not related to depression, anxiety, or stress, or were not relevant to program development, were excluded. Additionally, studies that did not include detailed program plans were omitted from the activity analysis. The literature review focused on academic articles and theses published between 1990 and 2023, identifying 403 relevant studies. Casebooks were collected from three domains, while forest therapy programs were obtained from three forest welfare organizations. These programs were categorized/analyzed based on their general characteristics, structure, and activity content. The findings indicated that research on psychotherapy (forest therapy) programs peaked between 2010 and 2014 (2020 and 2023) in casebooks and field settings. Programs documented in the literature commonly involved 11–20 sessions lasting 60–90 min, whereas casebooks and field programs typically featured fewer than five sessions, each lasting over 180 min. Nineteen purpose-driven and 40 practical activities were identified, providing a theoretical basis for developing forest therapy programs tailored toward alleviating depression, anxiety, and stress. The proposed activities and elements can support the diversification and professionalization of forest therapy programs, fostering more effective and specialized approaches to improve mental health.

Background: Although forest therapy services in South Korea have demonstrated mental and physical effects, there is no established system for forest therapy prescriptions. To this end, it is necessary to devise a systematic model for the introduction of forest therapy prescriptions by linking the existing forest therapy infrastructure and medical services. Therefore, this study aimed to derive the components and application plans needed to devise a forest therapy prescription model for the spread of medical-linked forest therapy services and to secure a forest therapy prescription infrastructure. Methods: To this end, Korean and foreign cases of prescription models and healthcare service provision systems were analyzed to derive the necessary components for prescription models. Subsequently, a Focus Group Interview (FGI) was conducted with eight experts in the fields of forest therapy and welfare, psychiatry, and health and nursing, and opinions were derived regarding the conception and empirical application of the forest therapy prescription model through content analysis. Results: As a result of the study, five components (clear role-sharing and a collaboration system, a continuous system, customized service provision, various technologies and content, and a database-based prescription system) were derived from cases of prescription models and healthcare service provision systems according to field. Furthermore, the FGI identified three primary topics: stakeholders’ scope and role, procedures and effectiveness, and additional considerations. Each was categorized into eight sub-categories relevant to the design of the forest therapy prescription model. Conclusions: These results can be used as basic data for devising a systematic Korean forest therapy prescription model in which forest therapy and medical services are linked, providing a foundation for personalized forest therapy prescriptions to be implemented.

Background/Objectives: Depression is a serious mental illness worldwide, with a continuously increasing prevalence. As evidence supporting forest therapy as a non-pharmacological intervention has accumulated, the need for collaboration between the medical and forest therapy sectors has emerged; however, practical tools applicable in real-world clinical settings remain limited. This study aimed to derive components of a diagnostic assessment sheet to support clinicians in developing personalized forest therapy programs for patients with depression. Methods: Program-related literature and case materials from diverse disciplines were systematically analyzed to identify transferable program development elements and therapeutic activities. Based on these findings, a two-round Delphi survey was conducted with 17 experts in forest therapy and medicine. Results: Through the Delphi process, 26 therapeutic activities were identified and classified into six final activity types. Assessment items were developed to support clinicians in selecting appropriate activity types, and nine key precaution items were identified to enhance safety and appropriateness during program design and implementation. Conclusions: This study provides a structured framework to guide clinicians and forest therapy instructors in composing individualized forest therapy programs for patients with depression, supporting practical medical–forest therapy integration. Future research should validate the diagnostic assessment sheet through empirical field testing.