Creating a Low-Maintenance Rock Yard: Depth, Preparation, and Tips

Replacing a grass lawn with decorative rock is a popular way to cut water use and maintenance. If you plan to lay black plastic as a weed barrier, you can skip the herbicide—the plastic blocks sunlight and prevents photosynthesis, so nothing grows underneath. The plastic should be covered with 2 to 4 inches of rock; the deeper the layer, the better it resists displacement from foot traffic. For areas with any walking, aim for at least 3 inches to avoid thin spots and "cattle trails." Choose a rock size and color that suits your aesthetic, but remember that larger, heavier stones stay in place better on slopes or in high-traffic zones.