Make sure you purchase special interlocking retaining wall blocks at your home center store. These blocks fit together when stacked so they will not tip over from the weight of the soil behind them.

Q: When we bought our 1942 house nine years ago, it came with a brick retaining wall 35 feet long and 4½-to-5½ feet tall. Holding up the stairs to our front door, it was already leaning to one ...