Garden retaining walls should, it seems, be made out of stone. By its very nature, stone is at ease in the garden; stone walls have a strength and soft irregularity that embrace and guide a garden ...

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 ...

Contractors looking for an add-on service or an area of diversification may want to consider concrete retaining walls. Three years ago, Cornerstone Foundations, Inc., Harrisonburg, Va., started ...