Australia's mushroom murder case will be heading back to court. 

Prosecutors have launched an appeal over the length of Erin Patterson's sentence. 

This follows her triple convictions – convictions her lawyer confirmed last week he intends to appeal. 

Melbourne correspondent Donna Demaio told Ryan Bridge the Crown intends to argue her sentence is "manifestly inadequate". 

Patterson was spared the harshest penalty available – a life sentence with no parole. 

She was instead sentenced to life in prison with a 33-year non-parole period, meaning she could be freed when she's 82 years old. 

Patterson's lawyer is yet to outline the grounds for her appeal. 

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