Mushroom murderer Erin Patterson will appeal her convictions, but her new lawyer has confirmed he needs more time to file the paperwork.

Patterson's appeal period was due to expire at 11.59pm on Monday but barrister Richard Edney on Thursday indicated in the Victorian Supreme Court they were not ready to lodge the appeal.

Justice Christopher Beale noted the Court of Appeal's new practice note, which grants appeal extensions as a matter of course if they're lodged within 56 days of the sentence.

While the paperwork is yet to be filed, Mr Edney said Patterson would lodge an appeal against a jury convicting her of three murders and one attempted murder.

"I can indicate there will be an appeal against conviction," he told the court.

The Director of Public Prosecutions has yet to decide wh

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