Queensland Premier Annastacia Palaszczuk seriously doubts the Greens are breathing down her deputy Jackie Trad's neck ahead of the state election.
The Greens have doorknocked nearly 3000 people in South Brisbane - almost a tenth of the electorate - showing 24.8 per cent support their candidate Amy MacMahon.
The party's data doesn't show how many people would vote for Ms Trad as the question asked whether residents would support the Greens.
But Ms MacMahon said the same methodology predicted within one per cent the result of the last Brisbane City Council election, which saw Greens candidate Jonathan Sri claim victory.
"We've got a really strong grass-root campaign we're running, and the data we're getting at the door indicates we're in a really strong position," Ms MacMahon told AAP.
But Ms Palaszczuk denied the Greens were a credible threat in the upcoming election, due by May but tipped for later this year.
"I find that hard to believe because Jackie is an outstanding local member," the premier said on Monday.
South Brisbane is a traditional Labor stronghold and was previously held by former premier Anna Bligh before she resigned after Labor's landslide 2012 election defeat.
Ms Trad holds the seat with a 13.6 per cent margin, after winning it in 2013 with 42.7 per cent of the primary vote, compared to the Liberal National Party's 32.2 per cent and the Greens' 21.85 per cent.
If the LNP doesn't run a candidate it could turn into a two-party race.
Veteran electoral analyst Malcolm Mackerras said the Greens were the closest they've ever been to securing a seat in the Queensland parliament.
"I think the LNP will preference the Greens (in South Brisbane)," Mr Mackerras said.
"If the LNP preference Labor, which is the normal policy, Labor will win the seat, but I've got a feeling they will preference the Greens. That's how Adam Bandt was first elected to federal parliament."
The Labor government has sought to boost support in South Brisbane by announcing the first new schools since 1963 and doorknocking residents.
Ms Palaszczuk was non-committal about whether she would personally help Ms Trad with doorknocking, saying there was "only one of me".
