We love the geometry and repetition of a terraced garden, and this little set-up (not pictured above), from the home of Susann Larsson of Purple Area, is an ingenious way to bring the look to your small-space deck or balcony garden. It works perfectly for herbs, which will stay small with constant harvesting...
Susann's lovely little garden benefits from the uniformity of the galvanized steel pots. Notice that she's left the herbs in their own plastic pots in order to avoid any rust contamination issues from the steel.
If you can't find a small terraced display like Susann's, you could always create a look like this using an interesting vintage ladder, or even a couple of shoe racks nailed together.
Susann's blog, Purple Area, is full of more wonderful inspiration, with occasional glimpses of her own lovely space. Unfortunately right now she's taking a little time off from Purple Area, but in the meantime you can read her work (with a little help from Google translator) on SvD.