Pepper plants would do awesome in cement containers like this. One pepper to a brick. They would thrive on the extra heat from the concrete. :[) Simple and inexpensive way to grow herbs or in my case succulents. If you are a crafty person you can mosiac the concrete by using dollar tree gems and stones and applying epoxy. Allow drying time then plant your heart away.
The herb spiral is a permaculture gardening method that uses nature to its full potential. Gravity allows the water to seep through the levels meaning that the plants at the top get full drainage while the ones at the bottom may reside in a simple bog. It also gives your herbs shady spots with varying degrees. The herbs that need full-sun can be grown in those positions while more shade loving plants can be located on the opposite side.