Decorative Lightweight Boulders The Practical SolutionWhy Use “Decorative Boulders?”Lightweight (hollow)Easy to install (no heavy equipment needed)Durability (state-of-the art concrete material)Realistic (only Mother Nature knows the difference) Where Can I Use “Decorative Boulders?”LandscapingFlower plantings (check out our planter rocks)Stump coversSeptic tank coversWell-head coversIndoor scenesDisplay your house number on our “address rock”These boulders will definitely enhance any landscaping you may have Mock RockApprox size: 30″H x 36″L x 36″W #1 lg. These are just a few that we carry. They are great for well pipes, cement mound covers and decoration.