Greens leader Richard Di Natale has refused to rule out preferencing the Liberal Party at a federal election in key marginal seats.
Speaking on Sunday, the Greens senator said the party was focused on building its primary vote without needing preferences from the major parties.
"Preferences are a long way away ... in the end voters will determine their own preferences," he told ABC television.
"Our focus is on trying to win those seats in our own right, build up our primary vote and that's really the focus for us at the moment."
The comments come after opposition leader Bill Shorten this week warned the Greens they would be hurt by preferencing the Liberal Party in some key Labor seats.
Shorten warns Greens over preferences https://t.co/sDjEsuxQXo— BigAl (@banas51) November 6, 2015
— David Crowe (@CroweDM) November 6, 2015
Asked if the Greens were willing to do a deal with the Liberals in marginal NSW electorates like Sydney and Grayndler, Di Natale said he would not "make any pronouncements about preferences now".
"I don't imagine we're going to start doing that now but again, those discussions will happen down the track," he added.
He said there were seats all across the nation that the Greens would target at the next election.
"There's ... the seat of Richmond in northern NSW, we've got Batman and Wills, Melbourne Ports, Higgins, there are seats right around the country where the Greens stand a real chance.
"We will be working very hard to boost our primary vote to make sure we try and win those seats in our own right."