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 Greens are targeting Deputy Premier Jackie Trad's electorate of South Brisbane. Credit:Tammy Law

The party's data does not 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 in the council ward of The Gabba.