"A growing body of research shows that people feel better when they see gardens, and there are specific biological responses that account for that sense of wellbeing.
Roger Ulrich, director of the Center for Health Systems and Design at Texas A&M University, is a pioneer in the research on the restorative effects of gardens.
He and [Clare Cooper Marcus, professor emeritus at the Departments of Architecture and Landscape Architecture at the University of California, Berkeley] co-authored a 1995 study that documented the stress-relieving benefits of hospital gardens. Nearly all of the patients in the study reported a positive change in mood after they sat in the gardens."
Thanks to Abhijeet Chavan