[2] In 1942, Australia's prime minister John Curtin launched a "Dig for Victory" campaign as rationing, drought, and a shortage of agricultural workers began to affect food supplies.
The situation began to ease in 1943 as fear of invasion lessened; however, home gardens continued throughout the war.
This included the importation of plants from Europe, initially for food, and the landscaping of broader lands for the cultivation of agriculture, forestry and grazing (displacing maintenance by Australian Aboriginal peoples).
[citation needed] Over time, interest in rediscovering traditional knowledge and expertise of the uses of Australia's native plants grew.
They are usually specific to the particular area they are grown in, whether as private gardens, as parts of or as entire public parks (often emphasising botanical exploration and re-establishment of wildlife habitat), in revegetation programmes for wetlands and grasslands, and as rain gardens utilising smaller spaces on streets.