The first metal edging to be used in gardens was cast iron. Typically ornamental in design it was limited to public gardens, commercial projects and large private estates because of its cost. After the industrial revolution, steel was more readily available, but it is only in recent years, as manufacturing techniques have evolved, that mass production has made metal edging more available, in particular the use of aluminium.
As design standards for home gardens has increased, the price of metal edging has come down. Once the secret of professional landscapers, edging such as aluminium is now widely available and affordable to all. The added bonus is its durability and flexibility.