Vic Libs preference Greens last: Napthine

The Liberals will preference the Greens last in all lower house seats in the upcoming Victorian election, Premier Denis Napthine says.

Dr Napthine said the Greens were bad for the economy and bad for Victoria.

"The Greens will threaten the future of our strong economy," he told reporters on Thursday.

"They will destroy jobs and put Victorian families at risk."

Dr Napthine was unclear on whether this would mean the Liberals would preference the Greens higher than controversial parties such as Rise Up Australia.

"We'll be putting the Greens last in lower house seats, and we'll be reserving judgment in the upper house," he said.

"In most cases, we'll be putting the Greens last."

Victorians go to the polls on November 29.

Dr Napthine said it was not known who all the candidates are yet, and when asked about Rise Up Australia, said: "We've got to see where they've got candidates".

"We will put the Greens last as a general rule."

"If there's extremist candidates we will consider putting them below the Greens."

The Greens say they had already assumed they wouldn't get the preferences.

"The fact is many inner city Liberal voters ignore the how-to-vote card and preference Green anyway," the party said.

"They're in despair about Denis and desperate for some action on global warming."

Labor has already shunned a formal preference deal with the Greens.