Frozen vegetables and berries sold in New Zealand can come from as far away as China, Belgium and Peru, a Consumer NZ survey found.
The independent consumer affairs organisation also found that of the 81 packets they surveyed, 17 had "vague statements" about where the products came from.
The only company to have sourced all ingredients within New Zealand was Talley's.
For the survey, Consumer NZ checked the "country of origin" statements of products from brands including Pams, Homebrand, McCain, Signature Range, Select, Wattie's, Sujon, Budget and Talley's.
It found many statements which made it impossible to tell from the label where the food came from.