Corten was the product of choice for this job in Norway.
EverEdge can now manufacture edging in Cor-Ten® steel either in the ProEdge or Titan styles.
Cor-Ten® is a weathering steel which is designed to rust. The steel forms a
rusty overcoat which proects the metal underneath. Despite appearing to
rust away, Cor-Ten® steel actually has a life expectancy in the hundreds
of years.
As any visitor to garden show over the last few years will have noticed, this natural look is all the rage.