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To prepare your yard for river rocks, smaller rocks may require laying landscape fabric to keep the stones from sinking into the ground while encouraging proper water drainage. You should also clear the land of weeds and larger boulders and, in some cases, test the density of the soil to ensure it can handle the weight.

Gravel’s biggest pro is its cost-effectiveness. For example, a gravel road or driveway is much more affordable than its asphalt counterpart. Gravel is also much less expensive than the cost of pouring a concrete slab if you’re building a patio or similar structure.

However, regarding comfort and convenience, gravel is far less foot-friendly than smoother substances like concrete or asphalt. It’s also more of a challenge to drive on and may kick up dust, resulting in the inevitable need for extra car washes. Lastly, there’s a chance it might move with rain or snow.

While they’re popular and have a lot of pros, the cons of river rocks include the following:

• River rocks don’t break down or provide nutrients to plants. 

• These stones can get hot and scorch nearby plants. 

• River stones may heat the surrounding soil to inhospitable temperatures. 

• Rocks can block rainwater from seeping into the ground if installations are too thick or tightly packed.

Most downsides occur when using river rock as mulch in gardens and flower beds. However, you can still incorporate river rocks into your landscape as long as you use them in the correct ways.

The most important thing to put under a rock garden is the appropriate soil. The specific soil needed will depend on the type of plants you’re growing as well as the environment you live in. You can also put non-woven or woven fabric under the rocks to add to the garden's structural stability.