Art, nature and mental health: assessing the biopsychosocial effects of a 'creative green prescription' museum programme involving horticulture, artmaking and collections.

Creative green prescription programmes, using a combination of arts- and nature-based activities, present distinct synergistic benefits that have the potential to make a significant impact on the psychosocial wellbeing of adult mental health service users. Museums with parks and gardens should consider integrating programmes of outdoor and indoor collections-inspired creative activities permitting combined engagement with nature, art and wellbeing.