Introduction - Raised Bed Gardening - page 32

Figure 19. A Simple Example of Loose Stones Stacked up to form a Raised Bed.
I have also seen broken concrete salvaged from a driveway that was replaced used in this
manner. It stacked well because one side was flat and the other side was nearly flat. It is a
goodideatouselandscapefabrictopreventthesoilfromwashingoutbetweenloosestacked
the rocks.
Figure 20 is a simple, but nice looking example of loose stacked landscape block (or garden
wall block) to build a nice little flower bed. These Blocks are about 12 inches wide and 4
inches thick and can easily be stacked up to build raised beds. If they are not mortared or
stacked very close together, then landscape fabric would be helpful to keep the soil from
washing though the cracks between the blocks.
Any time mortar is used to secure any type of block or brick, a good level foundation is
necessary. It's no big deal if un-mortared block shifts or settles, but if if a poor foundation
shifts, mortar will crack and it will be difficult to fix.