Rusted Ammunition Cans
One unique way to build a vertical garden is to use old, rustic ammunition cans and turn them into planters. You can hang them using a chain, in front of a redwood frame. Suspend the cans into the air and fill them with flowers, grass, plants, and herbs. These cans are durable and strong, and make excellent planters because of their sleek look and durability (The Horticult).