More ideas from Carmen
Here is a Gabion retaining wall that doubles as art with the different colors of stone

Stripped Gabion wall, also serving as a garden retaining wall? Could you grow things straight on top of a Gabion wall?

Wall planter

What a wonderful way to show off potted herb plants or flowers- a "tree" that holds twenty small pots on an exterior wall. Creative Ideas- plants to decorate your home and garden" via Lucid Life (article is written in Spanish)