Amorphophallus konjac - Cold Hardy - Large seedling tuber

This is a common species of cold hardy Amorphophallus with a large (~18 inch) flower. It is (badly) day time fragrant, but the fragrance only lasts about 1-2 days. 

I have kept it planted in my garden where it dropped down to 7 F for 72 hours last year, and it came back without any problems!