Dirty river rock doesn’t just look dull—it creates space for weeds, traps moisture around plant roots, and interferes with proper drainage. In Denver’s dusty, high-altitude climate, windblown soil, organic debris, mud splash, and occasional algae buildup can quickly affect the appearance and performance of your rock beds.
Learning how to clean river rock landscaping the right way protects your investment and keeps your xeriscape functioning properly. With a simple, water-conscious approach, you can restore your rock’s natural color without wasting irrigation resources.
Why River Rock Gets Dirty in Denver
Denver’s dry climate, strong winds, and intense sun create constant debris buildup. Fine dust from open land and construction settles into rock beds. Leaves, pine needles, and grass clippings decompose between stones, forming soil that encourages weed growth. Heavy rainstorms and spring snowmelt splash mud onto rocks, while shaded areas may develop algae due to trapped moisture.
Over time, this buildup dulls the stone’s appearance and reduces drainage efficiency.
Before You Begin: Evaluate the Area
Inspect your rock beds before cleaning.
Light buildup: Surface dust and loose debris only
Moderate buildup: Dirt settled between stones
Heavy buildup: Sunken rock, visible soil layers, or failing landscape fabric
If rocks have significantly settled or fabric is damaged, deeper restoration may be necessary.
The 4-Step Cleaning Process
Step 1: Remove Loose Debris
Use a leaf blower on a low setting to clear leaves and dust. Follow with a stiff broom to loosen dirt trapped between stones. Always complete dry cleaning first to prevent muddy buildup.
Step 2: Rinse Gently
Use a hose with a shower or mist setting. Avoid high-pressure spray, which wastes water and displaces rock. Rinse from high to low ground to control runoff and prevent pooling.
Step 3: Agitate Embedded Dirt
Lightly rake the surface to lift compacted soil. In heavily soiled areas, lift and drop small sections of rock to dislodge trapped dirt, then spot-rinse.
Step 4: Deep Clean When Needed
Every few years, remove rock in sections and rinse it over a screen to separate soil. Allow rocks to dry before reinstalling. Inspect and repair landscape fabric during this process.
How Often Should You Clean?
In Denver, light cleaning 2–3 times per year is typically sufficient—after spring storms, fall leaf drop, and late winter debris buildup. Deep cleaning may be needed every 2–4 years, depending on exposure to wind, trees, and nearby soil.
Signs it’s time to clean include dull rock color, visible soil between stones, and increased weed growth.
Final Thoughts
Routine maintenance keeps river rock attractive and functional while conserving water. A simple, consistent cleaning schedule prevents costly restoration and supports long-term xeriscape performance.
If your river rock landscaping needs professional attention, Mile High Lifescape has served Denver Metro homeowners for nearly 20 years with expert landscape rock services.
Call (303) 877-9091 or email hello@milehighlifescape.com to schedule your free assessment.
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