If you’re looking at landscaping plans or talking to contractors, you’ve probably encountered the term “DG.” Understanding what is dg in landscaping is key to planning your outdoor space. In landscaping plans, “DG” refers to decomposed granite, a versatile material used for pathways, patios, and ground cover.
This natural material is a popular choice for its aesthetic appeal and functional benefits. It offers a rustic, natural look that blends seamlessly with many garden styles.
Let’s break down everything you need to know about using DG in your yard.
What Is Dg In Landscaping
Decomposed granite, or DG, is exactly what it sounds like. It is granite rock that has weathered and eroded into a mixture of small stones, sand, and silt. This process happens naturally over thousands of years.
The result is a granular material that can be compacted to form a stable, permeable surface. It is not the same as crushed granite, which has sharper, larger fragments. DG has a finer, more decomposed texture that allows it to lock together.
Its color ranges from tan and gold to rusty browns and subtle grays. This depends on the source of the granite. This variety makes it easy to find a shade that complements your home and garden.
The Primary Uses Of Decomposed Granite
DG is incredibly versatile. Its main uses in residential and commercial landscaping fall into a few key categories. Each use takes advantage of DG’s unique properties.
You can use it to create stable surfaces that are still natural-looking. Here are the most common applications.
Pathways And Walkways
DG is a top choice for garden paths. It creates a informal, meandering feel that suits cottage gardens and rustic landscapes. A properly installed DG path is firm underfoot and provides good drainage.
It prevents puddles from forming after rain. This makes it a practical choice for areas between garden beds or leading to a backyard shed.
Patios And Outdoor Living Areas
For a more affordable alternative to stone or concrete patios, consider a DG patio. When stabilized, it creates a hard, durable surface suitable for furniture and foot traffic. It stays cooler than concrete in the summer sun, which is a nice bonus.
Many people enjoy the casual, earthy feel it brings to an outdoor seating area.
Driveways And Parking Strips
For light-duty driveways or parking pads, stabilized DG is a viable option. It can handle the weight of passenger vehicles when installed correctly over a proper base. Its permeability is a major benefit here, as it allows rainwater to soak into the ground rather than run off.
This can help with local drainage requirements.
Ground Cover And Xeriscaping
In dry climates or for water-wise gardening, loose DG is used as a decorative ground cover. It suppresses weeds, retains soil moisture, and gives a clean, uniform appearance. It’s a cornerstone of xeriscaping, reducing the need for thirsty lawns.
You often see it used around succulents, cacti, and other drought-tolerant plants.
Different Types Of Decomposed Granite
Not all DG is the same. It comes in several forms, each suited for a specific purpose. Choosing the right type is crucial for the success and longevity of your project.
Using the wrong type can lead to a surface that erodes quickly or never properly sets. Here are the three main types you’ll encounter.
- Natural DG: This is the basic, untreated material. It is simply screened to size. It remains loose and is best for decorative ground cover or very informal paths where some shifting is acceptable. It is the least expensive option but also the least stable.
- Stabilized DG: This is DG mixed with a stabilizer, usually a resin or polymer. The stabilizer binds the particles together when it cures, creating a semi-flexible, solid surface that resists erosion and displacement. This is the type you want for patios, main walkways, and driveways.
- Resin-Bound DG: This is a premium, poured-in-place surface. DG aggregates are fully coated with a clear polyurethane or epoxy resin and troweled onto a prepared base. It creates a smooth, solid, and highly durable surface that is permeable and virtually weed-proof. It is the most expensive but also the most polished option.
Benefits Of Using DG In Your Landscape
Why has DG become such a popular material? The answer lies in its combination of practical and aesthetic advantages. It solves several common landscaping problems at once.
From cost to enviornmental impact, the benefits are significant.
- Cost-Effective: Compared to pavers, flagstone, or poured concrete, DG is generally much less expensive, especially for larger areas. The material cost is lower, and for non-stabilized applications, installation can be a DIY project.
- Excellent Drainage: DG is a permeable material. Water filters through it, reducing runoff and replenishing groundwater. This makes it compliant with many municipal stormwater management guidelines and prevents puddling.
- Low Maintenance: Once installed, a stabilized DG surface requires minimal upkeep. Occasional raking to redistribute material and topping off every few years is typically all that’s needed. It doesn’t crack like concrete.
- Natural Aesthetic: It provides a soft, earthy look that blends with the garden environment. It looks more natural than concrete and less formal than cut stone, offering a relaxed, organic feel.
- Environmentally Friendly: As a natural material, it has a lower carbon footprint than manufactured products. Its permeability supports healthy soil ecology and reduces the urban heat island effect compared to asphalt or concrete.
- Versatility: As we’ve seen, it can be used for almost any horizontal surface in the landscape, from paths to patios to ground cover. This consistency can help unify your overall garden design.
Potential Drawbacks And Considerations
While DG has many strengths, it’s not perfect for every situation. Being aware of its limitations helps you decide if it’s the right choice for your specific project. A little planning can mitigate most of these issues.
Here are the main points to consider before you commit.
- Weed Growth: Over time, wind-blown seeds and organic matter can settle into loose or even stabilized DG, leading to weed growth. Using a landscape fabric underneath and applying a weed preventative can help manage this.
- Erosion and Tracking: Unstabilized DG can be displaced by heavy rain or foot traffic. It can also be tracked indoors on shoes. Stabilizing the DG or using edging to contain it are essential solutions.
- Dust: Dry, loose DG can produce dust, especially in windy areas or before it’s fully compacted. Stabilizers or applying a liquid soil stabilizer after installation can control dust effectively.
- Comfort Underfoot: While firm, it is not as uniformly smooth as concrete. It can be slightly uneven, which might be a consideration for those with mobility issues. It is also generally not recommended for high-heel traffic.
- Long-Term Replenishment: Even stabilized surfaces may require a fresh thin layer of DG every 3-5 years to maintain color and surface integrity, as the topmost fines can wash or wear away.
How To Install Decomposed Granite: A Step-By-Step Guide
Proper installation is the key to a long-lasting, attractive DG surface. Cutting corners on prep work will lead to problems later. For a stabilized pathway or patio, follow these steps carefully.
This guide assumes you are using a commercial stabilizer product, which you mix with the DG before installation.
- Plan and Mark the Area: Outline your path or patio using stakes and string or a garden hose. Consider curves and width, ensuring it’s practical for its intended use.
- Excavate the Soil: Dig out the area to a depth of about 4 inches. This will accommodate your base layers and the final DG surface. Ensure the excavated area is level or has a slight grade for drainage away from structures.
- Install Edging: Place solid edging along the sides of the excavation. Steel, aluminum, or robust plastic edging are good choices. This is a critical step to contain the DG and prevent it from spreading into planting beds.
- Add and Compact the Base: Fill the excavation with 2-3 inches of road base or class II road base gravel. Spread it evenly and then use a plate compactor to tamp it down firmly. This creates a stable, unyielding sub-base.
- Lay Landscape Fabric: Roll out a permeable landscape fabric over the compacted base. This suppresses weeds from below while still allowing water to drain through. Overlap seams by several inches.
- Mix DG with Stabilizer: In a wheelbarrow or mortar mixer, combine the decomposed granite with the liquid stabilizer according to the product’s exact instructions. Mix thoroughly until all particles are lightly coated.
- Spread and Level the Mix: Dump the mixed DG into your prepared area. Rake it to a consistent depth of about 1.5 inches. Use a screed board or the back of a rake to get a smooth, level surface.
- Compact the Surface: Use the plate compactor again to thoroughly compact the stabilized DG. This locks the particles together. You should do multiple passes for the best results.
- Mist and Cure: Lightly mist the surface with water, as recommended by your stabilizer brand. This helps initiate the curing process. Allow the surface to cure for at least 24-48 hours before walking on it.
Maintaining Your DG Surfaces
Maintenance is straightforward but important. Regular care keeps your DG looking fresh and funtional for years. A little effort goes a long way in preserving your investment.
Here is a simple seasonal maintenance checklist.
Seasonal Maintenance Checklist
- Spring: Rake the surface to redistribute any displaced material. Look for low spots and fill them with a bit of fresh, stabilized DG mix. Apply a pre-emergent herbicide to prevent weed seeds from germinating.
- Summer: Periodically rake to keep the surface even. For loose DG ground cover, this is the time to check for erosion and add more material if needed. Water stabilized surfaces occasionally to minimize dust.
- Fall: Clear fallen leaves promptly, as decaying leaves can add organic matter that encourages weeds. This is also a good time to do a thorough inspection and plan for any top-dressing needed the following spring.
- Winter: In freeze-thaw climates, avoid using metal shovels or ice melt products on stabilized DG, as they can damage the surface. Use a plastic shovel and sand for traction if necessary.
Cost Comparison With Other Materials
Budget is often a deciding factor. Understanding how DG stacks up against other common materials helps you make an informed financial decision. Costs vary widely by region and project complexity, but the general relationships hold true.
Here’s a rough comparison per square foot for materials and basic installation (DIY for DG, professional for others).
- Loose DG (Ground Cover): $1 – $3 per sq. ft. This is the most budget-friendly option by far, especially if you spread it yourself.
- Stabilized DG (Path/Patio): $4 – $8 per sq. ft. The cost includes stabilizer and more labor for proper base preparation and compaction.
- Resin-Bound DG: $12 – $20+ per sq. ft. This is a professional installation product with higher material costs, but it offers a premium finish.
- Concrete Pavers: $10 – $20 per sq. ft. Installed cost includes base, sand, pavers, and labor. More formal look, higher cost.
- Poured Concrete: $8 – $15 per sq. ft. A permanent solution but can crack and has high runoff. Mid-range on cost.
- Flagstone or Bluestone: $15 – $30+ per sq. ft. The high-end choice for natural stone, requiring skilled labor for installation.
Frequently Asked Questions About DG
You might still have some specific questions. Here are answers to some of the most common queries about decomposed granite in landscaping.
Is DG The Same As Crushed Granite?
No, they are different. Crushed granite is mechanically crushed rock with sharp, angular edges. Decomposed granite is naturally weathered, resulting in smaller, more rounded particles and fines that allow it to compact more cohesively. DG is generally better for creating stable surfaces.
Can I Install DG Myself?
Yes, for loose ground cover and even stabilized paths, DG is a very DIY-friendly project. The key is meticulous preparation of the base and proper compaction. Renting a plate compactor is essential for any stabilized application. For large patios or resin-bound systems, hiring a professional is advisable.
How Do I Stop DG From Getting Everywhere?
Containment is crucial. Use solid, deep edging buried alongside your DG area. For stabilized projects, the binding agent locks the material in place. For loose DG ground cover, a generous border of larger stones or a mow strip can help contain the material.
Is Decomposed Granite Good For Dog Runs?
It can be, with caveats. Stabilized DG provides a firm, drainable surface that is easier on paws than concrete. However, you must clean solid waste promptly, as urine can eventually break down organic stabilizers. Using a polymer stabilizer rather than an organic one may be more durable in this application.
How Long Does A DG Pathway Last?
A properly installed stabilized DG pathway can last 10 years or more with occasional top-dressing. Loose DG used as ground cover may need replenishing every 2-5 years, depending on foot traffic and weather conditions. The quality of the installation, especially the base, is the biggest factor in longevity.