Labour soars as Greens plummet in poll

The Green Party has plummeted below the 5% threshold it needs to return to Parliament while Labour has soared in the first political poll since former Green co-leader Metiria Turei stepped down.

The One News Colmar Brunton poll has the Greens on just 4% while Labour has rocketed up from 24 to 37% in the first Colmar Brunton poll since Jacinda Ardern took over as leader.

The Greens are just short of the 5% party vote needed to get over the threshold to return to Parliament.

The poll shows the change from Andrew Little to Ardern as leader has worked for Labour to recapture support. It is seven points adrift of National which was also feeling the strain, dropping from 47 to 44%.

Ardern had rocketed up to 30% as preferred PM, even with National leader Bill English.

The poll was not as bad for NZ First as the Greens - it was down from 11% to 10%.

The Maori Party had nudged up 2% and Gareth Morgan's Opportunities Party was steady on 2%.

The One News Colmar Brunton poll of about 1000 voters has a margin of error of ± 3.1%.