Common Rock Sizes for Landscaping

Rocks of varying size can be used to create textural contrast in the landscape.

Rock has many potential uses in the landscape: naturalistic focal point, attractive mulch, economical pathway or xeriscape turf replacement. Well-chosen rock can yield beautiful results in the garden, while an inappropriate size or shape of landscape rock can create an unappealing aesthetic or a mess that's difficult to remove.

Fines

This type of rock aggregate is ideal for using in pathways. Comprised of a mix of rock particle sizes 1/2-inch and smaller, fines will pack down to a reasonably stable surface if confined by an edging.

Pea Gravel

This small, smooth gravel, available in variety of colors, is striking as a mulch or turf replacement. Pea gravel's round shape and small size are difficult to hold in place, making them a poor choice for pathways.

River Rock

Pea gravel's larger cousin, river rock plays a role as an edging material, turf replacement or mulch. River rock can be used alongside pea gravel of a similar color to create a pleasing contrast in textures.

Flagstone

These wide, flat rocks can be fitted together to create pathways or walls. Try tilting small flagstones on their side for a rustic edging.

Boulders

Large and eye-catching, boulders add visual appeal and architecture to a garden design.

References

• Landscaping Search: Types of Landscape Rock; Brandon Cornett

Resources

• "Taylor's Master Guide to Landscaping"; Rita Buchanan; 2000