Professor Clare Cooper Marcus give a well informed and very well detailed description of how Patient-specific Healing Garden's Landscape should be designed. She has also mentioned dates and matched them with today's knowledge about gardens and how things have changed from then to now.
Marcus also mentioned the difference certain Healing Gardens have from another for example those that have mental illness will find different surroundings then those how are suffering from stress. All gardens do have a large amount of greenery but little changes are made with the layout due to what illness the garden is supposed to heal.
Clare Cooper Marcus, 2015. Landscape design: Patient-specific Healing Gardens. [Online] (2015) Available at: < http://www.worldhealthdesign.com/patient-specific-healing-gardens.aspx> [1 June 2015].