The service has also been announced just days after her husband, Ian Wilkinson, was released from hospital after two months of treatment following the suspected poisoning in Leongatha on July 29.
Heather Wilkinson, a victim of the suspected mushroom poisoning incident on July 29 in Leongatha, Victoria. (Supplied)
Reverend Ian Wilkinson, a pastor at the Korumburra Baptist Church in Gippsland is the man fighting for life. His wife, Heather has died.
Married couple Heather and Ian Wilkinson both fell ill but Ian has survived. (Nine)

Wilkinson, her sister Gail Paterson and her husband Don died in hospital after they all ate beef Wellington cooked by their daughter-in-law Erin Patterson.

Donations collected at the memorial will go to the Austin Hospital, which is where Heather was treated before passing away.

Funds will also be donated to a charity hospital in Niger, which was said to be close to Heather’s heart.

Police are continuing to investigate the suspected poisoning, with all victims having displayed symptoms of poisoning by death cap mushrooms.

Erin Patterson has not been charged but police previously said she was considered a suspect in the case because she cooked the meal.

Patterson told police she had made the beef Wellington using button mushrooms bought from a mainstream supermarket, and dried mushrooms purchased from an Asian grocery store.

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