Top: nice stone work in Mill Valley. It’s starting to look like Fall. Above: seedlings with Buddha front and center at Zen Center garden at Green Gulch Farm, Calif.

“The vertical garden, designed by Patrick Blanc, is 4 storeys high and takes up one outside wall, overlooking the plaza. It has 15,000 plants from more than 250 different species and most of it is flourishing.

There is an irrigation system which seems to be ongoing, given the gentle mist of droplets that emanates from the garden. The architects said that they wanted to ‘create a very unusual encounter between the rough and the natural, …to incorporate nature so there can be the smell of a garden where you would not expect it.'”

https://www.treehugger.com/files/2011/05/madrids-green-wall-flourishing.php

Note: 1/4″ wire mesh is placed on the ground, from edge to edge, and  under the blocks before filling with soil. I suggest letting the wire extend at least an inch beyond the edges of the blocks. Gopher-proof.