If you still haven't found a vertical planter idea that is exactly your style, maybe this one will do it for you. The pots are simply held in position by a single piece of rebar put through the drain holes of the pots. Perfect for small herbs!
I mitt paradis: Grindar på plats - driveway yard needs to be this wide, with entry wider. Building in back here would really be a retaining wall to gabion fence above, and maybe a water drain design to the left to go further downhill.