Strawberries make great cinder block plants because they don’t need loads of room to grow. What’s more, as they send out their runners, you can fill up the rest of the planter.
Not all herbs work well as plants in cinder blocks, but there are enough that we can group them together. The best are: -Cilantro -Marjoram -Dill
Arugula is happy in confined spaces, so a cinder block is pretty much perfect. Plus, each plant is fairly small, so it’s easy to use them as plants in cinder blocks.
Just focus on smaller carrot varieties, such as Chantenay, and you shouldn’t have any problem growing them in cinder blocks.
Petunias are great plants in cinder blocks because they’re easy to grow and don’t need loads of root space. If grown in the equivalent of a 6-inch pot, you shouldn’t expect them to get too big.