"And as a result of New Zealand asking for a higher price, the packhouses and supermarkets in Europe have decided to go as long as they possibly can with their own production and reduce the import season.
NZ Onion Company managing director Mike Blake. Photo / RNZ - Carol Stiles
"Instead of having a four or six-week programme (selling New Zealand onions), they are only going to have a two or three-week window."
He said about a third of New Zealand's 180,000 to 200,000-tonne export crop usually headed to Europe.
"But it's not really proving to be the saviour that we were anticipating," Blake said.
Growers have also had a difficult year. Very hot dry conditions early in the season resulted in small onions with thin skins and then crops were hit with mildew following heavy rain.
Photo / RNZ - Carol Stiles
Indonesia provides a market for some of New Zealand's smaller onions.
The New Zealand Onion Company exports 15,000 tonnes of onions each year and Blake said he expected that to reduce by 30 per cent this season.
The first of this season's onions left New Zealand earlier this month.