At the same time, she plans to hold job interview-style catch-ups with every member of her mammoth 64-strong caucus, the largest in Labour's history.

Ms Ardern won a parliamentary majority in Saturday's election, the first since electoral reforms in 1996, which will allow Labour to govern in its own right if she so chooses.

Given New Zealand is pre-disposed to coalition arrangements, she decided to hold talks with the Greens, which began on Monday, with scoping discussions with co-leaders Marama Davidson and James Shaw.

"My very clear expectation is that we will conclude those conversations around potential areas of co-operation next week sometime," she said on Tuesday.

"We would look to announce to the outcome of those discussions around that timeframe as well.

"Then in the following week, it's my expectation we will then announce ministerial allocations and then move to the more formal formation and swearing in of a government."

A formal coalition arrangement is unlikely.

Instead the Greens may be offered a handful of portfolios - including the return of Mr Shaw in climate change - and a 'confidence and supply' agreement.

Ms Ardern could also choose to shut the door and go it alone.

"What's very clear, obviously to New Zealand and to us, is we do have a very clear mandate," she said.

"But as I've seen before, I'm interested in areas of co-operation where we can use the strengths that exist in their team for the benefit of the government and New Zealand."

Ms Ardern is not looking to deal with the opposition, the National party or free-market right-wingers ACT.

She has also ruled out bringing the Maori party - which is likely to have won one seat - into the fold as the two parties share a tense history and compete for the Maori electorates.

Ms Ardern chaired the first Labour caucus meeting of the 53rd Parliament on Tuesday morning, needing to rearrange the furniture to bring everyone in.

While Labour's win was predicted, the scale of it was not and the leader is keen to get to know her new caucus before dishing out jobs.

"With every single one of our members of parliament - the ones newly-elected, those existing members - I will be having conversations with over the coming two weeks, hearing what their areas of interest are, the way we can utilise their strengths," she said.

"Different ideas. Different talents. Different backgrounds.

"We have some exceptional new talent that have come into the caucus and I want to make sure we're making the most of it."

More than half of Ms Ardern's caucus are women, while Labour also boasts Vanushi Walters, New Zealand's first Sri Lankan-born MP, and Ibraham Omer, who fled Eritrea as a refugee.

Australian Associated Press