The Australian Greens are urging the major parties support farmers and workers in the Riverland by backing a new push for country of origin labelling laws.

Senator for South Australia Penny Wright said the Greens would introduce new legislation for mandatory labelling in the Senate this week.

"Everyone wants to support our farmers and workers by buying local, but the current labelling laws are too confusing and can be misleading," said Senator Wright.

The Australian Greens have a $46.5 million plan for teaching kids what they need to know about food including funding up to 800 new school kitchen gardens and ensuring healthy eating and nutrition is part of the national curriculum.

"One of the best things we can do to help our children lead a healthy life is to teach them about food - how to grow it, choose it, buy it, cook it and store it," Greens Leader Senator Christine Milne said.

In what is believed to be an Australian first, Australian Greens Leader Senator Christine Milne will launch a key election platform online: the Greens' plan for Australia's food security.

The comprehensive plan includes seven fully costed initiatives totalling over $600 million in commitments over the next four years.

The package will be released online in a video conference with farmers, suppliers and stakeholders across the country.

Australian Greens Leader Christine Milne today announced an $85 million plan to help farmers bypass the big two supermarkets and sell direct to consumers.

"People care about where their food comes from and that local farmers get paid a reasonable price for it," Senator Milne said.

"Farmers don't have many options for selling their produce outside the low prices offered by the big supermarket chains.