A recall is underway for bags of fresh parsley after tests revealed traces of listeria.
Traces of the bacteria were found in 50g bags of Tasman Bay Herbs Italian Parsley with a best-before date of 27 June.
The company said the traces were found on Monday after intensive testing and the parsley should not be eaten.
The bags were sold to nine retail outlets in Auckland, Wellington, Nelson and Christchurch.
The Riwaka-based company said most of the herbs were grown on its own premises but some was brought in from elsewhere to meet seasonal demand and the contaminated herbs came from one of those suppliers.
It said a voluntary recall on all products has been issued as a precaution, and customers would receive a full refund from affected retailers.
The company's owner, Don Grant, said it was devastated and was working with its suppliers to ensure this never happened again.