Big plants heading

Metallic Elephant Ear

Alocasia plumbea 'Metallica'

Height: 4′ to 6′
Leaf size: 24″ to 30″ 
Cold Resistance: zone 7
Light:Sun to light shade

Another favorite of mine, this is well named.  The leaves have a metallic look and it gets quite large. It will die back with the first frost but come back in the spring.  Mine has survived temperatures down to about 10F.