A Narrative Review of Nature-Based Interventions that Support Mental Health and Well-Being for Adults Affected by Cancer

People affected by cancer experience significant mental health challenges across the cancer continuum, marked by anxiety, depression, fear of recurrence, and identity disruption. Several evidenced-based integrative oncology approaches are recommended to address psychosocial sequelae (eg, mindfulness, yoga, and music therapy), however, less attention has been given to the role of spending safe and meaningful time in natural environments for this purpose. Growing research suggests that nature-based interventions (NBIs) offer meaningful mental health benefits by reducing stress, restoring attention, and increasing opportunities for physical activity and social connection. In this narrative review, we synthesize evidence on the effects of exemplar NBIs delivered to cancer patients and survivor samples to improve mental health, psychosocial outcomes, and physical biomarkers. Findings are organized across the six following NBI modalities: (1) horticultural and gardening interventions, (2) therapeutic landscapes and built design, (3) group-based immersive wilderness experiences, (4) forest therapy interventions, (5) nature-based physical activity, and (6) nature prescriptions. Feasibility and acceptability were demonstrated across NBIs, with reported benefits such as reduced psychological distress, improved mood, sleep, quality of life, self-efficacy, and social connectedness. Evidence remains heterogeneous, with many studies limited by small sample sizes, nonrandomized designs, and variability in intervention dose and outcomes assessed. This narrative review highlights the potential of NBIs to complement existing psychosocial supports to promote resilience and well-being among people affected by cancer.