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If you hire a professional landscaper, you could expect to pay between $90 and $660 to install three cubic yards of river rock. (That’s based on the average river rock installation cost of $30 to $220 per cubic yard.) However, the exact price depends on the kind of river rock you choose. Crushed limestone and riprap are some of the more affordable options, while boulders and Arizona river rock are pricier.

Wood from black walnut, magnolia, eucalyptus, red maple, and invasive species like tree of heaven are not recommended for mulching. These trees release allelochemicals that can suppress plant growth. Some homeowners, however, use wood from these trees for mulching if it is less potent due to age or concentration, or if the plants are not as sensitive to them.

Because gravel moves, it requires different maintenance than asphalt or concrete. Here are a few maintenance tips for your gravel driveway. Every few years (or as often as needed):

• Grade and level your driveway

• Rake to fill holes and ruts

• Compact any refilled potholes

• Remove weeds with herbicide or by hand

• Spray it with water to reduce the amount of dust kicked up

• Avoid using a snowplow during winter months

Rubber mulch costs an average of $90 per yard to replace, or $4 per foot. Costs vary based on the quality of the rubber mulch, manufacturer prices, and the cost of delivery and installation labor to lay it down. Consult a local mulch professional for a price quote on your specific installation project.