An outdoor exhibition of work by artists who take their inspiration from the natural world. On show in the gardens are works that address and interpret aspects of the debate on environmental change. Participants include Hugo Wilson and Joe Currie, Annie Cattrell, Tania Kovats, Tessa Farmer, Peter Randall-Page and David Worthington. Worthington, who is Vice President of the Royal British Society of Sculptors, has curated the show. Its title comes from the seventeenth-century definition of 'physic' and is a reminder of the garden's founding mission as a place for the study of useful plants, especially those used in medicine.