Greens leader Christine Milne has admitted her party's poor poll result is disappointing but dismissed speculation that it was a reflection of her leadership.

The Greens today recorded their lowest Newspoll result today for three and half years, falling to a primary vote of 8 per cent.

Poll setback: Christine Milne has rejected the idea she is the wrong person to lead the Greens. Credit:Andrew Meares

This is the first time since early 2010 that the party has been in single digits and represents a dip from its 11 per cent primary vote in mid-August.

"The poll today, it's disappointing," Senator Milne told reporters today in Hobart. "Especially since we have delivered one of the biggest injections into healthcare in Australia in decades [with the $4 billion dental reforms last week]."