Wet and warm weather conditions have created an "ideal" growing environment for poisonous mushrooms around Victoria, the state's chief health officer warns.

Professor Charles Guest has urged Victorians to avoid gathering mushrooms in Melbourne and rural areas - even from their own gardens - in case they accidently pickup something deadly.

The death cap mushroom can be fatal within 48 hours. Credit:Marina Neil

Two of the state's most dangerous mushrooms - the Death Cap fungus, Amanita phalloides and the Yellow Staining mushroom, Agaricus xanthodermus - can be confused with edible varieties, he said.