Concrete interlocking blocks have some advantages over wood for making raised beds. First, they don't rot. Also, they can be dismantled and moved, the container's shape changed or deepened. You ...

For concrete block raised beds, you can use one layer or stack two together. Most blocks are 8X8X16 and fairly inexpensive.

To make rustic building blocks, draw a pattern on the slab freehand with some chalk. Draw the pieces more or less 8 inches wide and 12 inches long.