Cinder blocks are used in building walls but the holes also make them adaptable for planting. Cinder blocks are not the most appealing material and they are bulky. They may take up more gardening space than is desirable but as mentioned earlier the holes can be used for planting spaces themselves. Even painting them can be a problem because they might have to be painted every few years due to peeling and chipping. Soil in them dries rapidly and requires frequent watering.
Bricks have the potential of being the nicest looking material to use for construction.
They come in a variety of colors and are usually put together with mortar. The skill of a brick-layer may be needed to build the planter. Due to the expense of the material and the type of con- struction needed, brick planters are usually permanent. Bricks may be the most expensive material unless used bricks are avail- able. Make sure any used bricks are suitable for exterior use.