Westonbirt was started around 1829 and many of the specimens now present date back to that time. The site covers an area of 600acres and includes areas of Ancient Semi Natural Woodland, specimen plants and open grassland. This woodland is an important area in itself as it represents one of the largest areas of woodland of its type in the locality. It is primarily Oak Standards with an understorey of Hazel coppice with some areas of high forest. Some of the work in these areas involves the restoration of this woodland type, which was clearfelled some 60 years ago.