There are renewed calls for mandatory country of origin food labelling after the discovery only one brand of frozen vegetables contains 100 per cent New Zealand-grown ingredients.
Talley's Frozen Foods is the only brand on the supermarket shelves that contains vegetables that are grown and processed here.
National sales manager Bob Darragh says people don't know what's local and what's not because country of origin food labelling is voluntary in New Zealand.
"I'm a consumer myself, I think people just want to know where their produce is coming from that they're eating, as simple as that really."
Other brands supplement local produce with vegetables from China, Vietnam, South American and the United States.
