It is dominated by a very large bunya pine at the rear of the cottage with substantial trees along the southern boundaryr. Species include cypress (Cupressus sp.), hackberry/ southern nettle tree (Celtis australis), sweet gum (Liquidambar styraciflua), and bangalow palms (Archontophoenix cunninghamiana). In the centre of the enclosed garden is a rough arbour of timber and pipe supporting Chinese wisteria (W.sinensis). The area under the large trees are planted with Kaffir lilies (Clivia spp.), cast-iron plant (Aspidistra elatior), Philodendron sp., fruit salad plant (Monstera deliciosa) and ferns. A number of shrubs were planted near the toilet block in 2005 including Eureka Lemon Tree (citrus limonum), Photinia (Photinia glabra), Sacred Bamboo (Nandina demestica Gulf Stream) and dwarf oleander (Nerium olender oink). The garden's distinctiveearly tree plantings show the application of European influences to the local scene and the living style of colonial society at the time. Just inside the garden fence near the kitchen wing is an Osage orange tree (Maclura pomifera). This is a once-common spiny hedge species imported from Mid-West United States of America used in colonial Australia before the widespread introduction of fencing wire, that is now rare, particularly so east of the Great Dividing Range and in the Sydney basin. Paved areas are located at the rear of the L-shaped building and under the arbour, while stepping stones connect the rear of the cottage with the eastern side of the coachman's cottage. At the rear of the cottage is a square brick structure covering a well with a hand-operated pump. A number of inlet pits with steel grates are located throughout the garden and the reserve beyond for site drainage. Hambledon Reserve is a flat area devoted to passive recreation. It provides the landscape setting for the cottage, Coachman's cottage and garden. The density of tree cover increases towards the cottage with several mature trees dating from the Macarthur period of ownership. These include several majestic English oaks (Quercus robur), a cork oak (Q.suber) a hoop pine (Araucaria cunninghamii), Brazilian pepper tree (Schinus auriera) and a large camphor laurel (Cinnamomum camphora).