Let your walls grow wild! Bella Builders, based in Manhattan Beach, Calif., showcased their green-loving Living Wall Systems, which are paneled "ecosystem installations."
Although you might think they're just trellises, they're not. The modular wall units have a thick, mossy, fibrous medium with evenly spaced pockets throughout. You can place individual plants to grow in any design. As for upkeep, the units recycle their own water in a self-contained system, so plants naturally draw only what they need.
Pricing for custom Living Walls start around $200 per square foot.