I live in Youngstown,Ohio and i just bought one of these plants from homedepo. it says it can live outside in the in mild winters- it then says to bring inside during the winter?? hmm i need to know if it would survive the winter if i let it outside in the ground and cut it back and applied mulch.... it says zones 8-10 - which i think i'm 6 or 7? makes me wonder about the other canna's plants i just bought from columbus- green one and a midnight one. now i did see some planted in a yard near my house and there is alot of them and it doesn't look like they dig them up and bring them inside in the winter? one thing with columbus since they are growing everywhere the weather there is alot warmer then here and mild winters. anyyone have any thoughts for me?? thanks