A barley crop is being sown in the heart of Adelaide in a project at the Botanic Gardens.
The crop is in the south-east corner of the gardens to raise awareness of food production.
Environment Minister Ian Hunter said it paid tribute to the hard work of farmers.
"It will help people to think beyond the supermarket when thinking about food and appreciate the important role of farmers and plants in ensuring our food security," he said.
"The variety of barley being grown, Navigator, was developed by research scientists at the University of Adelaide to suit Australian growing conditions."
A wheat crop was raised in the Botanic Gardens last year.
The crops are included on a self-guided tour which people are able to download to their phones as they enjoy the Gardens.