The Lushe Wall Garden is a simple DIY vertical system that is perfect for herbs. You could create your own edible wall. It is very easy to install and it is cheap.
Each container is 595mm wide x 200mm high x 200mm deep
Each box contains 10 modules which is enough to cover 1.6 square metres
Timber battens are not included.
Material: Recycled Black Polypropylene
See more info here