I have a tall fence that looms over my narrow courtyard. I'm in the process of building some raised beds, but I also wanted a way to get some greenery going vertically, due to the small space. So, I made these small planter boxes and mounted them on the rails of my fence.
I used fence palings, with wood glue and nails and then lined them in builder's plastic and weed mat. They also have drainage holes in the bottom of them.
The 500mm one has two strawberry plants and a marigold, and the 300mm one has mint in it. I have one more 500mm one which I'm still mulling over what to put in.
I decided against painting the fence as well. It seemed like a big undertaking for less payback than getting my beds built and planted. It turns out the colour isn't quite Monument. It's hard to tell from the photo, but the planter boxes (painted Monument) are a bit more blue than the fence colour but it's close enough that it doesn't bother me.
The bigger beds are going great. The soil level has dropped, so I need to top them up, but I've got some plants that are doing really well in them. Unfortunately, my courtyard is in no state to have any pictures of it shared, but I'll be sure to post some when I get it all cleaned up for the spring/summer.