The Greens have launched a campaign to convince voters they'll get double-value for their ballot.
The Greens' party organisation swung a deal on preference swaps with Labor, but parliamentary leader Bob Brown and others are urging people to exercise their own choice.
The Greens candidate for the Queensland seat of Hinkler, Adrian Wone, quit to run as an independent over the issue of preferences.
The party has now added a section to its website promoting the idea of double-value in a Greens vote.
Greens Queensland Senate candidate Larissa Waters said if people voted Green in the House of Representative their second preference will carry equal weight as a first preference, given that it is doubtful the party will win seats in the lower house.
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"In Queensland we're probably not likely to elect someone to the lower house," Ms Waters said.
"People can still Vote 1 Green. They can send a message that they like our policies better, but whoever they put their number two preference next to will still get their vote in full value.
"So it's a double-value vote for the Greens."
Ms Waters said the party is urging a vote "below the line" on the Senate ballot paper, numbering all the boxes.
"If they decide to take a short-cut and vote above the line, the party makes that decision," she said.
"We don't want the parties to be making that decision. We think the voter should make that decision."
