The Museum stands in a varied 2-hectare site which was the 19th Century garden of the well-known painter, Sir George Reid. After long neglect, it was reclaimed for the Regiment as a memorial and as a place of beauty and tranquility for Museum visitors and for those who use the tea room socially. It consists of walled gardens which include terraced herbaceous beds, a Garden of Contemplation and a Secret Garden. Monuments connected with the Regiment are incorporated and plants and areas are dedicated to individual soldiers.

The Garden contains a range of unusual plants of interest to the plants person. The Garden was created and is maintained by Volunteers under the supervision of their Co-ordinating Gardener, Dr. Tom Smith.