The Scotland’s Lost Gardens exhibition by The Royal Commission for Ancient and Historic Monuments started on Saturday and runs until 29 September.
It charts the history and cultural significance of the gardens dating back 1,500 years from the practical kitchen gardens of monastic settlements of the sixth and seventh centuries to Victorian rockeries and ferneries and war time allotments.
As well as climate and landscape the gardens reflected Scottish history, religion, science, art and literature.
Curator and commission architectural historian Clare Sorensen said, "Gardens are one of the most important elements in the cultural history of Scotland. Like any art form, they provide an insight into social, political and economic fashions, they intimately reflect the personalities and ideals of the individuals who created them and they capture the changing fortunes of successive generations of monarchs and noblemen.
"Yet they remain fragile features of the landscape, easily changed, abandoned or destroyed, leaving little or no trace."
The outdoor exhibition is open between 10am and 5.45pm at John Hope Gateway decking. Entry is free.