Spotted on Miss Rumphius' Rules, in a post called Portland Contained, an extra-long steel planter that we're now coveting. Here's how to create the same look:

For another planter idea that that will instantly transform your garden, see "Mixed Messages: Planters with a Split Personality."

Above: A planter fabricated from steel runs the length of the building's facade. (N.B.: For planters that will make your garden look twice as big, see "Design Sleuth: Mirrored Planters from Paris."

Above: A Corten Steel Planter Retaining Wall System from Planterworx. Constructed in modular units, the system can be configured for custom designs and comes with all necessary hardware. The planter system also can be fabricated in stainless steel and powder coated aluminum. For more information and pricing, see Planterworx.