Recycled Pallet Vertical Garden - Very little room on your urban porch or backyard? How about maximizing the space you have by growing up? I'll be using a pallet sitting in my back yard to plant garden center annuals or possibly native succulents.
Herbs in coffee cans, hung with zip ties. Drill a hole in coffee cans & zip tie to railings! You could pretty much mount any container, like a box in this same way. bigger containers may require more zip ties.