Measure the Space You Want to Fill
If you remember how you were taught to calculate volume in school, you already have an idea of how to figure out how many decorative rocks you need. Landscaping rocks are sold in pounds, which makes it easier to come up with your calculation. To start, simply measure the length and width of the space you want to fill. If the area has curves, add a few inches to the calculation. As a general rule, it’s better to have slightly more decorative rocks than you need than to not have enough.
Know How to Plan for the Depth
Your next step is to determine the ideal depth of the decorative rock bed. If you plan on digging out a hole, include this amount in your calculation. Most decorative rock gardens do well with two inches of decorative rock, but you might need more for other purposes. For instance, driveways made of stones such as gray or black polished pebbles will need closer to four to five inches of decorative rock due to how the beach pebbles may get displaced by the weight of vehicles.
The depth of the decorative rocks can also vary based on their size. With larger rocks, you can sometimes get by with one or two layers in spaces that serve only decorative purposes. While you should err on the side of caution by planning to place multiple rocks, you’ll also want to consider the need for maintenance. Being able to move the decorative rocks back into place on slopes is also an important factor to consider as you estimate the depth.
Consider the Height of the Edging
As you determine the depth of the decorative rocks, consider the height of any decorative edging that exists in the landscaping design. Ideally, the decorative rocks should come to the top of the edging. If the decorative rocks are too low, the divider could become a tripping hazard. Decorative rocks that cover the edging may cause it to bend and create a spillover.
Use a Handy Calculator
Once you have your length, width, and depth measurements, you’re ready to plug them into a calculator. Using an online calculator from a landscaping rock supplier makes it easy to get an accurate estimation of how much decorative rock you need to order. Keep in mind you might still have questions regarding the final calculation. If so, reach out to a landscaping rock professional who can guide you to the correct amount of decorative rocks to order to fit your project’s needs.
No matter what type of landscaping project you’re planning, you can enhance its character and beauty with decorative rocks in a variety of sizes and colors, from pure gold pebbles to polished black river rock. For expert advice on designing your landscape with decorative rocks, reach out to the experts at RS&P Rocks Stones & Pebbles, a premier landscape rock and supply superstore. We specialize in drought-tolerant landscaping materials, including a variety of Mexican beach pebble and river rock. To learn how we can help you create the landscape of your dreams, call us today.
