Finding the right landscaping materials can transform a basic yard into a professional-looking outdoor space. Whether you are looking to build a durable walkway, improve your garden’s drainage, or create a low-maintenance decorative border, stone and rock products offer a permanent solution that mulch simply cannot match. This guide will help you understand the different types of landscaping rocks available, how to choose the right materials for your specific project, and how to source them effectively from local suppliers.
Understanding Common Types of Landscaping Rocks
The first step in any landscaping project is identifying the material that best fits your aesthetic and functional needs. Rocks come in various sizes, shapes, and colors, each suited for different applications around the home.
River Rocks and Cobblestones
River rocks are smooth, rounded stones that have been tumbled by water over time. They are typically available in various sizes, ranging from small pebbles to large stones several inches in diameter. Because of their smooth texture and natural colors—often grays, tans, and soft greens—they are a popular choice for water features, dry creek beds, and decorative borders.
Pea Gravel
Pea gravel consists of small, pea-sized stones that are smooth and rounded. It is one of the most versatile landscaping materials because it is comfortable to walk on and provides excellent drainage. It is frequently used for paths, patios, and as a base for children’s play areas. Pea gravel comes in a variety of multicolored mixes, making it easy to match with most home exteriors.
Crushed Stone and Decomposed Granite
Unlike river rocks, crushed stone is angular and jagged. This shape allows the stones to lock together when compacted, creating a stable surface. This makes it ideal for driveways and high-traffic walkways. Decomposed granite is an even finer version that offers a rustic, natural look often seen in Mediterranean-style gardens or desert landscaping.
Lava Rock
Lava rock is a lightweight, porous volcanic rock. It is typically available in deep red or black colors. Because it is porous, it retains some moisture while allowing excess water to drain through, making it a unique alternative to wood mulch in garden beds. It is also very durable and does not decompose, meaning you won’t need to replace it every year.
Matching Stones to Your Specific Project
Choosing the right rock is not just about looks; it is also about performance. Different projects require different physical properties from the stone you select.
Walkways and High-Traffic Areas
For paths where people will be walking frequently, stability is the most important factor. Small, rounded stones like pea gravel are excellent for comfort, but they can shift underfoot. If you want a more solid feel, consider using a mix of crushed stone or decomposed granite. These materials pack down tightly to create a firm surface that accommodates foot traffic and even strollers or wheelchairs.
Garden Beds and Weed Suppression
When using rock as a mulch replacement in garden beds, larger stones like river rock or lava rock are often preferred. These stones stay in place during heavy rain and provide a clean, modern look. However, it is essential to install a heavy-duty landscape fabric underneath the stones. This fabric prevents the rocks from sinking into the soil and helps suppress weed growth.
Drainage and Erosion Control
If your yard has areas where water pools or soil washes away, rock can be a functional solution. Large river rocks or rip-rap (large, rugged stones) are excellent for lining drainage ditches or creating dry creek beds. The weight of the stones prevents them from being moved by rushing water, while the gaps between the stones allow water to seep back into the ground naturally.
How to Calculate the Amount of Material You Need
One of the biggest challenges in landscaping is determining exactly how much rock to buy. Most stone suppliers sell materials by the ton or by the cubic yard. To find out how much you need, you will need to measure the length and width of your project area.
First, calculate the square footage by multiplying the length by the width. Next, decide how deep you want the rock to be. For most decorative applications, a depth of two to three inches is standard. For walkways, you may want three to four inches for better stability.
- Measure: Length (ft) x Width (ft) = Square Footage.
- Depth: Square Footage x (Desired Depth in inches / 12) = Cubic Feet.
- Convert: Cubic Feet / 27 = Cubic Yards.
Most experts recommend adding about 10% to your final total to account for settling and uneven ground. Buying in bulk is significantly more cost-effective than buying individual bags from a hardware store, especially for large projects.
Sourcing and Delivery Tips
Finding a reliable supplier is the final step in your project. Local landscape supply yards and quarries are usually the best places to look. They often have a wider variety of stones than big-box retailers and can provide expert advice on which materials are native to your region.
When you contact a supplier, ask about their delivery options. Landscaping stone is extremely heavy, and a single cubic yard of gravel can weigh nearly 3,000 pounds. Most homeowners find it much easier to pay a delivery fee to have the material dropped off in their driveway rather than attempting to haul it themselves in a standard pickup truck.
Questions to Ask Your Supplier:
- Do you have a minimum order requirement for delivery?
- Is the stone washed or does it contain “fines” (dust and small particles)?
- Can I visit the yard to see the colors in person before ordering?
- What is the lead time for scheduling a delivery?
Installation Best Practices
To ensure your landscaping looks great for years to come, follow a few simple installation steps. Always clear the area of existing grass and weeds before starting. Level the ground as much as possible to prevent low spots where water might collect.
As mentioned previously, always use a high-quality landscape fabric. Avoid thin, plastic liners, as they tear easily and do not allow the soil to breathe. Secure the fabric with landscape staples to keep it from shifting while you pour the rock. Finally, use a rake to spread the stone evenly across the surface, ensuring a consistent depth throughout the area.
Conclusion
Using stone in your landscape is a smart investment that adds curb appeal and reduces the amount of time you spend on yard maintenance. By understanding the differences between river rock, gravel, and crushed stone, you can choose the material that best suits your project’s needs. Remember to calculate your measurements carefully and source your materials from a reputable local supplier to get the best value. For more tips on improving your home’s exterior and tackling DIY projects, explore our other helpful guides on gardening and outdoor maintenance.