Xeriscaping Calculator
— How Much Do You Need?

Xeriscaping is a style of landscaping designed to work with your local climate rather than fight it. The word comes from the Greek word "xeros," meaning dry. You will sometimes hear it called drought-tolerant landscaping, low-water landscaping, or dry landscaping. The core idea is simple: replace water-hungry plants and turf grass with materials and plants that thrive with very little irrigation. Gravel and other aggregate materials are a cornerstone of xeriscape design for several practical reasons. Gravel replaces thirsty lawn across large sections of your yard, eliminating the need to water those areas at all. It acts as a ground cover layer over the soil, slowing evaporation and keeping root zones from drying out too fast in the heat. It also allows rainwater to drain directly into the ground rather than running off, so your plants get the most out of every drop of natural rainfall. Whether you are converting your entire front yard, adding a dry creek bed feature, or simply reducing the amount of lawn around your foundation, gravel is one of the hardest-working and lowest-maintenance materials you can choose for a xeriscape project.

The right material depends on how you plan to use it and what look you are going for, but a few options stand out consistently in xeriscape designs. Decomposed granite is one of the most widely used xeriscape materials in the country. It has a natural, sandy appearance that pairs beautifully with native plants and desert-style plantings. It also compacts firmly underfoot, which makes it a smart choice for informal pathways and open ground cover areas where you want a surface that feels stable and finished. Crushed angular gravel is a strong option when you need a material that stays in place. Because the pieces have irregular edges, they lock together and resist shifting even in heavy rain or wind. Pea gravel has a smooth, rounded finish that gives your yard a softer, more relaxed look. It drains very well and is comfortable to walk on, which makes it a favorite for garden paths and seating areas within a xeriscape. River rock is a larger, rounded stone that works well as an accent layer around boulders and drought-tolerant plants, or as the centerpiece of a dry creek bed feature. It is not as practical for walking surfaces but adds a lot of natural character to a xeriscape design. If you are not sure which material fits your project, the Hello Gravel team is glad to help you work through your options.

Depth is where most first-time xeriscape projects go wrong, usually by underestimating. For standard ground cover areas, most xeriscape installations use 2 to 3 inches of aggregate. This is enough to suppress weeds, retain soil moisture underneath, and give the surface a clean, finished appearance. For pathways or higher-traffic zones, 3 to 4 inches gives you better stability and a longer-lasting surface. As a general starting point, 1 ton of gravel covers roughly 80 to 100 square feet at a 3-inch depth. Keep in mind that the exact coverage varies by material, since different aggregates have different weights per cubic yard. Decomposed granite tends to run heavier than pea gravel, for example, so the actual tonnage you need may shift depending on your material choice. To put some real numbers around it: a 500 square foot area at 3 inches deep typically requires around 5 to 6 tons. A 1,000 square foot area at the same depth would need roughly 10 to 12 tons. These are conservative, real-world estimates, not minimums. Your actual project may vary based on your specific dimensions and the material you choose. The most precise way to estimate your order is to use the Hello Gravel online calculator. Enter your project dimensions and your target depth, and it will give you a quantity based on your specific job rather than a general approximation.

Xeriscaping does require a real upfront investment. You are replacing existing lawn or landscaping, which means site preparation, edging, weed barrier, plants, and aggregate all factor into the cost before the work is done. Compared to re-seeding a lawn, that initial number can feel significant. But the long-term picture often tells a very different story. A traditional grass lawn can use hundreds of gallons of water per week during the summer, and water bills in drought-prone areas reflect that. Once your xeriscape is established, most of those watering costs go away. The single most effective way to control your project costs is to buy your aggregate in bulk. Purchasing gravel by the truckload through Hello Gravel costs far less per ton than sourcing material in smaller quantities, and you avoid the expense and hassle of multiple trips or deliveries. Free dump truck delivery is included with every Hello Gravel order, so there are no hidden delivery costs eating into your budget. If your full xeriscape vision is larger than your current budget allows, consider phasing the project. Start with your front yard or the areas that use the most water, complete those sections with bulk material, and add to the design over time. Buying the right quantity upfront for each phase is still more cost-effective than rushing and overpaying for last-minute additions.

The honest answer is that gravel simply outlasts most of the alternatives over time, and that durability adds up to real savings and less ongoing effort. Wood mulch breaks down and needs to be replenished every year or two. It can also float or shift during heavy rain, leaving gaps in coverage and scatter across your driveway or lawn. Gravel does neither. Once it is down, it stays put and holds its appearance for years without any ongoing maintenance. Gravel also provides natural weed suppression when it is laid at the right depth over a quality weed barrier. It does not need to be raked, mowed, fertilized, or edged the way a traditional lawn does. For most homeowners, that reduction in weekly yard work is one of the biggest practical benefits of making the switch. From a plant health standpoint, gravel acts as an insulating layer between your soil and the air above it, which reduces evaporation and helps the roots of your drought-tolerant plants stay cooler during hot weather. It also allows rainwater to pass directly into the ground rather than pooling on the surface, which supports healthy plant growth without any irrigation from your end. In fire-prone areas of the country, gravel also has a significant safety advantage over organic mulches. It does not ignite, which creates a natural buffer zone around your home and reduces the risk of fire spreading through your landscaping.