Planting in cinderblocks
We built a little concrete wall at the side of our covered front patio...we built it out of 3 layers of cinderblocks. The top layer, we left the holes open and embedded a trellis. My thought was that I could fill the cinderblock holes with soil and plant some climbing plants. So that in effect, the cinderblocks would be a "planter".
I am not sure if this would work, because the drainage probably won't be good, plus the cinderblock holes are only about 4 or 5 inches square.
Perhaps if I started the climbing plants as seeds in the spring (something like morning glories?) they would not outgrow the holes. Then since they are annuals, just take them out & plant new ones in the fall.
Has anyone else done something like this and how did it work?