Sometimes a garden calls for a different look. Not every patio or walkway needs to be concrete, flagstone, brick, or tile. Sometimes the landscape style, budget, or intended use of the area suggests a less formal surface. At Details Landscape Art, we occasionally recommend decomposed granite in these situations.
Decomposed granite, commonly called “DG,” is particularly effective in Mediterranean-style gardens, informal patios, walkways, and dog areas. It creates a relaxed, natural appearance that blends beautifully with the landscape.
What Is Decomposed Granite?
Decomposed granite is a crushed and pulverized rock product available in tan and gray colors. In the eastern part of the United States it is often referred to as “hardpan.” When properly compacted, it forms a hard, attractive surface suitable for patios, walkways, and other outdoor living spaces.
For many years, one of its drawbacks has been its tendency to become soft and mushy during the rainy season. Homeowners and pets would track loose particles into the house, creating a mess.
Fortunately, modern stabilizer products have dramatically improved its performance.
How Decomposed Granite Is Installed
Proper installation is critical to achieving a durable surface.
The area is first excavated to a depth of approximately four inches. Next, steel edging or bender board is installed around the perimeter to contain the material and define the shape of the patio or walkway.
A two-inch layer of base rock is then spread, leveled, and compacted. Once the base is firm, approximately two inches of DGe is added and rolled smooth.
A stabilizer is applied to the upper layer and worked into the surface. The area is then compacted with a vibratory plate compactor. A final application of stabilizer helps bind the surface together and reduce tracking and erosion.
The completed surface should be allowed to dry thoroughly before use.
Maintaining Decomposed Granite
Like most landscape materials, decomposed granite benefits from periodic maintenance.
Over time, foot traffic, weather, pets, and irrigation can disturb the surface. In shady locations, algae or mold may occasionally develop.
We recommend lightly loosening the upper portion of the surface every few years, smoothing it with a rake, applying additional stabilizer, and recompacting it. This simple maintenance helps restore the appearance and performance of the surface.
When Decomposed Granite Makes Sense
Decomposed granite is not ideal for every application.
For example, dining tables and chairs with narrow legs may gradually sink into the surface, even when stabilizers are used. Homeowners who frequently entertain with formal patio furniture are usually better served by concrete, flagstone, brick, or tile.
DG works particularly well for:
- Garden pathways
- Informal patios
- Courtyard gardens
- Dog runs
- Secondary seating areas
- Mediterranean-style landscapes
Its softer appearance often helps it blend naturally into the surrounding garden.
A Natural Fit for Mediterranean Gardens
One of our favorite uses for decomposed granite is in Mediterranean-style landscapes.
The warm earth tones complement classic Mediterranean plants such as olive trees, lavender, rosemary, citrus, and creeping thyme. Low-growing plants spilling over the edges soften the transition between the hardscape and planting areas and create a relaxed, timeless appearance.
Throughout southern France and Spain, decomposed granite is commonly used for patios, walkways, and even driveways. It looks perfectly at home in California’s Mediterranean climate as well.
Beauty Without Formality
Not every homeowner wants a formal patio.
For those seeking a more relaxed and natural appearance, decomposed granite offers an attractive and economical alternative to traditional hardscape materials. When properly installed and maintained, it provides years of service while contributing to the character and charm of the landscape.
At Details Landscape Art, we carefully match hardscape materials to the style of the garden and the needs of the homeowner. In the right setting, decomposed granite can be both practical and beautiful.