Australia is a suburban nation, with 85 percent of the 20 million people clinging to the coastal fringes of the world's largest island and oldest continent. This article explores Australian suburbia as the `third space' that mediates urbanism to `nature'. It draws on the thought of George Seddon, an important initiator of ecological history, regional geography and sub/urban politics in Australia. Seddon's insights on Australian ecosystems and Australian interpretations, namings, perceptions and shapings of their natural environment since the beginning of (...) European colonization in 1788 are used to think about the `nature of suburbia', `nature in suburbia' and suburbia in Australian `nature'. Its central argument is that nature is always culturally mediated and that the dominant ecological imaginary in Australia is suburban. The suburbs are the sites of economic, ecological and cultural trafficking about nature. It is argued here that the `bush', at least since the Second World War in Australia, has been more determinative of the suburban social imaginary than the `city'. In recent years, the meaning of the `bush' has transmuted from the `country' into the `wilderness', and from a valorization of the historic settlement process to myths of pure, aboriginal nature unadulterated by human imaginings and interventions. Though the meanings of the `bush' have changed in each case, its interpreter and maker is the socialized gardener of suburbia. The future of Australian nature is to be played out in the suburbs. (shrink)