The Isabella Plantation is a 40 acre woodland garden set within a Victorian woodland plantation planted in the 1830's. First opened to the public in 1953, it is best known for its evergreen azaleas, which line the ponds and streams and at their peak of flower in late April and early May.

Located in the gardens are the National Collection of Wilson 50 Kurume Azaelas (introduced to the west from Japan in the 1920's by the plant collector Ernest Wilson), large collections of Rhododendrons and Camellias, plus many other rare and unusual trees and shrubs which provide interest all year round.

Part of the parklands conservation designation as a Site of Special Scientific Interest, the site is managed very much with nature in mind and the gardens are run on organic principles. Native plants commonly grow alongside exotics throughout the Plantation. Perimeter and shelterbelt areas are planted with native nectar and berry bearing trees and shrubs to provide food and shelter for birds, bats and insects. The Plantation's ponds and stream provide additional habitat for invertebrates and amphibians.

Richmond Park has been designated as a Site of Special Scientific Interest and a National Nature Reserve. The royal connections to this park probably go back further than any of the others, beginning with Edward (1272-1307), when the area was known as the Manor of Sheen. The name was changed to Richmond during Henry VII's reign.