River Rock Mulch Depth and Installation

How Deep Should River Rock Be Applied?

A homeowner plans to use river rock instead of mulch in new landscaping and asks about standard depth guidelines.

Essential Preparation

Always install geotextile (weed barrier) fabric underneath. Weed seeds will eventually germinate in the rock; periodic hand-pulling or herbicide spot-treatment will be needed.

Depth Guidelines

Depth depends on rock size. For 1/2" to 3/4" river rock, 2 inches is typically sufficient to fully cover the geotextile and provide an attractive, functional layer.

Calculation Tip

One cubic yard of 2-inch deep rock covers approximately 162 square feet (4.24 square yards). Adjust based on your rock size and desired depth.