A side-by-side comparison to help you choose the right ground cover for every area of your yard.
Mulch and rock are the two most popular ground covers for landscape beds, walkways, and borders. Each has clear strengths and weaknesses, and the best choice depends on where you are using it, what you are growing, and how much maintenance you want to do.
This guide compares them across the factors that matter most — cost, durability, plant health, heat retention, and appearance — so you can make the right call for every part of your yard.
$30 – $50 per cubic yard
$50 – $150 per cubic yard
Mulch is cheaper to buy and install. Rock has a higher upfront cost but does not need annual replacement.
Replace every 1 – 2 years
Lasts 10+ years with minimal upkeep
Over a 10-year period, rock typically costs less because you buy it once. Mulch needs topping off each season.
Refresh annually, occasional weeding
Occasional leaf blowing, weed barrier needed
Both require some maintenance. Mulch decomposes and needs replacement. Rock collects debris and weeds can grow through gaps.
Retains moisture, adds nutrients as it decomposes
Does not add nutrients, can increase soil heat
Mulch is far better for garden beds and trees. It keeps roots cool, retains moisture, and feeds the soil as it breaks down.
Insulates soil, keeps roots cool
Absorbs and radiates heat, warms surrounding soil
In hot climates, rock can increase soil temperatures by 10–15 degrees. This can stress plants and increase watering needs.
Natural look, fades over time
Clean modern look, permanent color
This comes down to personal preference. Mulch suits traditional landscapes. Rock works well for modern, xeriscaped, or low-water designs.
Ready to calculate materials? Mulch calculator • River rock calculator →
Use mulch around plants, trees, and garden beds. Any area where you want plants to thrive benefits from mulch. It feeds the soil, retains moisture, and keeps root temperatures stable. Organic mulch is the go-to for flower beds, vegetable gardens, shrub borders, and tree rings.
Use rock for pathways, borders, and dry areas. Decorative rock is ideal for walkways, drainage channels, xeriscaped areas, and decorative borders where plants are not the focus. River rock works well around downspouts and in dry creek beds for both aesthetics and drainage.
Use rock in hot, dry climates where water conservation matters. In the Southwest and other arid regions, rock landscaping reduces watering needs and fits the natural aesthetic. Pair it with drought-tolerant plants for a low-maintenance yard.
Mix both for the best results. Most well-designed landscapes use a combination. Mulch goes in the plant beds, rock goes in the pathways and borders. This gives you the plant health benefits of mulch with the durability and clean lines of rock.
Enter your address to measure your landscape beds — so you order the right amount of mulch or rock.
Then use our mulch calculator or river rock calculator to get exact quantities.