The Green Party has set a new date for a special meeting to decide whether to boot now-independent MP Darleen Tana from Parliament.

The meeting was postponed for a hearing of Tana's legal claim she was pressured to resign, after an investigation found she likely knew of alleged migrant exploitation at her husband's business.

Green Party co-leader Chlöe Swarbrick says notice has been sent to branches of a meeting to be held on October 17.

"I am incredibly confident in the wisdom of our party - and that's part of the reason that we've also set this date with the opportunity for our members to properly deliberate."

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