Size the trench so there's enough room for the retaining wall block and at least 8 in. of space behind it. Excavate deep enough to completely bury at least one full course, including space for 6 to 8 ...

Rocks are the unsung heroes of landscaping. They don't need water, pruning, or fertilizer, and yet they continue to do the heavy lifting in beautiful landscapes all over the world. From defining ...