More to explore:
Barbed wire trellis
Great for the back porch!
Wire frame around tree is invisible and creates a great trellis effect.
Build a Fence Trellis
barbed wire trellis
Bicycle wheels as trellis for flower climbers
Barbed Wire Trellis - Fabulous!
cute Garden fence
build it up, great way to add interest/vines to the side of a plain wall.
This would make a captivataing metal trellis for climbing plants. Spinning Spider In A Web Barbed Wire Garden Trellis