Australian Country Alliance - which was 1900 votes short of an upper house seat in 2010 - is in a good position to claim a spot this time with the ALP preferencing them second.

Today, Greens candidate Jenny O'Connor, who is number one for the party's upper house ticket, said they had been left with "no choice" but to issue open tickets in many electorates.

"We tried to do a preference deal with Labor and they refused, so we're not doing them any favours - what choice do we have?" she said.

"But we haven't done a deal with the Liberals... we're saying to people to make up their own minds."

In North East Victoria, the Greens are running an open ticket in Benambra and a preferenced ticket in Ovens Valley, with the ALP in the number 2 spot.

With both seats extremely safe Coalition seats, Greens preferences are likely Labor's best bet at making a dent in those margins.

Ms O'Connor said she doubted the party would make up ground in Northern Victoria, and that ACA would likely claim one of the five seats.

"It's likely a climate change denialist will get in ahead of me because of Labor's preferences," she said.