DIY PLANTERS :: 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.
It's an animal-filled Monday Montage, and we've also got a homemade reading tent and a radical balcony gardening solution. In the links, nerd out on office supplies and learn what people make from 200 plastic bags.
Also on these boards
DIY Herb Garden DIY Herb Garden DIY Herb Garden