A vertical garden is a great way to go green, decorate and train your green thumb (even if you don't have one...). In a vertical garden, plants, flowers or vegetables are "stored" vertically, in many possible ways. You can use a simple shelf, or a specifically designed shelf. Both work well. So basically you can get a vertical garden with whatever budget you want.
I especially like this (professional) solution, which is very neat and minimal:
|YUU modular system @ Borella Designs|
I'll share the steps of the project with you, kids, dirt and all. :)