The garden surrounding the Bullamon Homestead has evolved over the many decades from one of self-sufficient fresh produce, to an ornamental recreation area then falling into disrepair by the 1980s. Restoration of the garden has now begun

In the early days, the remoteness of Bullamon Station required it to be self-sufficient for fresh produce. The garden was focused on functional plantings, with some ornamental items. 

In the 1860s and 1870s, the Mackay family grew oranges, melons, grapes and passionfruit as well as vegetables. In later life, one of the Mackay children still remembered the delicious oranges produced by a tree planted over the remains of sheep or a bullock in the Bullamon garden.

During the Edward Hill family’s residence at Bullamon in the 1880s and 1890s, seeds were ordered each year from Sydney. Fruit trees (mostly citrus and stone fruit) and grape vines were ordered from Toowoomba. 

In the late 19th and early 20th centuries, the Bullamon garden was managed by Chinese gardeners. This was typical of station gardens in this district at the time. When the Hill family had to evacuate to a nearby sandhill during the 1890 flood, the Chinese gardener tended the vegetable garden in boxes until it could be replanted.

The strong emphasis on edible produce appears to have continued through to the 1920s when the Brown family extended the garden. At this time an extensive and complex system of brick drains in the northern part of the garden was installed which was believed to water a large vegetable garden for domestic use. Some of the brickwork is still evident to this day. During the extension of the garden more ornamental plants, including roses, were starting to feature. Visitors to Bullamon in the period from the 1930s to 1960s remember a vast cream-flowered banksia rose and bougainvillea-covered arbour leading to the house. 

By the 1980s much of the original arbour had collapsed or had to be demolished. Since the 1990s most of the plants in the garden had died due to a combination of age and drought. 

The final stages of the restoration of the homestead and re-creation of the garden began in 2021. Some plants for the garden re-creation were propagated from cuttings taken from the garden at Bullamon Plains, which dates from the late 1920s and contains many plants that once grew at Bullamon. They include a banksia rose that originated as a cutting from the old Bullamon garden. 
During the creation of drainage trenches for the homestead in 2020, and the rebuilding of the arbour in 2021, many bone fragments and what appeared to be largely intact leg bones of cattle were unearthed. These bones are believed to have been used as a slow-release fertiliser for the garden.