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When building a retaining wall, lay perforated drainage tubing at the base of the wall slightly above ground level so runoff can drain out without undermining your wall
A concrete block retaining wall is the perfect solution to control erosion, to eliminate a hard-to-mow slope, to add a planting bed, or to level an ideal patio area. These systems are easy to install, durable, reasonably priced and available in a variety of colors and textures. This article shows you how to install one in a weekend.
How to Build a Retaining Wall The simplest, cheapest, back-friendliest retaining wall in history