The Greens have drawn up a hit list of 25 federal Parliament seats they aim to win over the next generation – including those now held by Malcolm Turnbull and Tony Abbott – as part of an ambitious pitch to become a major power-sharing force in national politics.

At the party's national conference, Greens leader Richard Di Natale will on Sunday outline plans to climb from a balance-of-power player to a major party that could govern in coalition with either Labor or the Liberals.

Senator Richard Di Natale has plans for the Greens to become a major party that could govern in coalition with either Labor or the Liberals. Credit:Fairfax Media

But he has pledged it will not mean a shift towards the centre for the left-wing party, insisting the changes in the political landscape over the next quarter of a century will naturally favour the Greens.

Senator Di Natale will tell the conference in Hobart – which is also being used to mark 25 years for the Australian Greens – that over the next 25 years, the party's ambition will be to win 25 Lower House seats – one he insists is achievable.