I bought one of Bright Green's GroVert living wall planters (Amazon affiliate link) to see see how their system works. This 10-cell, polymer panel measures 8" wide, 18" tall and 4" deep. Multiple panels can be linked together to create a solid living wall.
The cells of the planter are set at a 45 degree angle to keep water and soil from falling out once the panel is mounted on the wall. Very clever!
At the base of each cell is a "moisture mat" - another smart idea - that holds water and keeps plant roots from drying out.
For my "living salad wall" I wanted lots of color and texture, plus I wanted organic starts since I plan to make salad eventually with what I've planted. So I headed to West Seattle Nursery to see what I could find. I came away with lettuces: 'Wildfire Mix,' 'Salad Bowl Red,' 'Winter Density,' a spicy mesculun mix, and endive. I also got 4" starts of cilantro, Italian parsley, French thyme and and 'Apricot Trifle' nasturtium.
I realized as I planted these that it might have been better to have planted less in each cell, and filled in with more potting soil. It is tempting, though, to do just what I did, because a 4" pony-pack fits really nicely into each cell. But no worries, I can easily revise the planting if necessary as the season progresses.
OK, with the planting done, the next step was to water thoroughly and let the panel sit at a slight angle to drain before mounting. While the panel was draining, I installed the bracket to hold the panel onto my fence.
And here it is - my living salad wall!
To top it off, I added an irrigator box.
This little box mounts on top of the panel and holds a quart of water. (I'm showing it here with the lid open. After adding water, you'll want to close the lid to keep dirt from getting in.) Small holes in the bottom of the box let water slowly trickle down into the planter, keeping the plants and the moisture pads irrigated.
It will be fun to see how this works out. As with any gardening experiment, I expect some plants to do well and others will need to be replaced. If I get a few salads out of it, I'll consider it a success. Regardless, the planter and irrigator will still be around for me to use in another season.