Labor's national executive has ordered the party to preference the Greens ahead of all others in every state except Queensland.

Labor has a deal with Bob Katter's Australian Party in Queensland, but in other states and in the ACT, Greens senate candidates have been given a boost to their electoral chances.

Greens Leader Christine Milne. Labor will preference the Greens in the Senate nationally except in Queensland. Credit:Andrew Meares

The move has angered ALP members in Victoria, who fear the deal might also affect how people vote in the lower house seat of Melbourne, which Labor is trying to win back from the Greens.

ALP national secretary George Wright did not respond to calls from Fairfax Media.