Flower bed edging creates clean boundaries between garden beds and lawn, prevents grass invasion, and improves drainage. The process involves marking your bed line, trenching along that line, installing your chosen edging material (plastic, metal, stone, brick, or wood), backfilling, and securing it. Material choice depends on budget, aesthetics, soil conditions, and how permanent you want the edging to be.
Choosing the Right Edging Material
Before you break ground, it helps to understand the trade-offs between common edging materials. Each type offers different benefits in terms of cost, durability, appearance, and ease of installation.
Plastic Landscape Edging
Plastic edging is generally the lowest-cost option and is lightweight, making it easy to transport and install. It comes in flexible rolls that work well for curved beds and is available in various colors and styles. However, plastic can become brittle over time, especially in colder climates, and may not hold up as well against heavy foot traffic or lawn equipment. It’s a solid choice for temporary or budget-conscious projects.
Metal Edging (Steel or Aluminum)
Metal edging creates a thin, crisp line that gives beds a polished, professional look. Steel is rigid and durable but may develop a rust patina over time, which some gardeners find attractive. Aluminum won’t rust and is lighter, making it easier to handle. Metal edging resists impact better than plastic and works well for both straight and gently curved beds. It’s a mid-range option that balances durability and aesthetics.
Stone or Brick Pavers
Stone, brick, and concrete pavers are among the most durable and permanent edging options. They add significant visual weight and can create a classic, formal appearance. These materials handle heavy use well and can last for decades when properly installed. The trade-off is higher material cost and more labor-intensive installation, especially if you need to cut pavers for curves or corners.
Wood or Timber Edging
Wood edging offers a natural, rustic look that blends well with garden settings. It’s often budget-friendly and easy to work with using basic tools. However, all wood eventually degrades when in direct contact with soil, even rot-resistant species. Wood edging typically requires more maintenance and may need replacement sooner than inorganic options. It’s a good choice for informal gardens or temporary borders.
Factors to Consider
Your soil type, climate, and drainage conditions all influence which material will perform best. Heavy clay soils that retain moisture may accelerate wood rot, while sandy soils may require deeper anchoring for any edging type. In regions with significant freeze-thaw cycles, materials that can be anchored deeply or that resist heaving will perform better. Think about whether you want a temporary border for a seasonal bed or a permanent boundary you won’t need to revisit for years.
Tools and Supplies You’ll Need
Gathering the right tools before you start prevents mid-project trips to the hardware store. Some tools are universal for any edging project, while others depend on your chosen material.
Universal Tools
- Spade or flat shovel: For digging and shaping the trench
- Trenching shovel or edging tool: For creating clean, narrow trenches
- Tape measure: For measuring bed perimeter and edging lengths
- Level: For ensuring edging sits evenly, especially for stone or brick
- Rubber mallet: For tapping edging and pavers into place without damage
- Garden hose or string line: For marking curved or straight bed lines
- Stakes and string: For marking straight lines and securing edging
- Backfill material: Soil, gravel, or sand depending on your edging type
Material-Specific Tools
- For plastic edging: Utility knife or heavy scissors for cutting to length
- For metal edging: Tin snips for aluminum, angle grinder or hacksaw for steel; always wear eye protection and gloves when cutting metal
- For stone or brick: Chisel and masonry hammer for cutting, or a wet saw for precise cuts; safety glasses and gloves are essential
- For wood edging: Drill for pre-drilling holes, saw for cutting to length, and rebar or long spikes for anchoring
Safety Gear
Always wear sturdy work gloves when handling edging materials, especially metal and stone. Eye protection is essential when cutting any hard material. Closed-toe shoes protect your feet when using heavy tools or working around sharp materials. If you’re working with pressure-treated lumber, consider wearing a dust mask when cutting it.
Preparing the Site: Marking, Trenching, and Leveling
Proper site preparation is the foundation of a stable, long-lasting edging installation. These universal steps apply regardless of which material you choose.
Marking Your Bed Line
Start by defining where you want the edge of your bed to be. For straight lines, drive stakes at each end and run a taut string between them. For curved beds, use a garden hose or rope to lay out the desired shape, adjusting until you’re satisfied with the flow. Step back and view the line from multiple angles before committing. Once you’re happy with the layout, use spray paint or a spade to mark the ground along the line.
Digging the Trench
A trench provides a stable base and helps anchor edging against movement. The trench should be wide enough to accommodate your chosen edging material with a small amount of room on either side. Depth depends on the height of your edging—a general guideline is to bury at least a few inches below grade so the edging is anchored but still visible above ground. In areas with frost heave, deeper anchoring helps prevent winter movement.
Dig the trench with a spade or trenching tool, keeping the bottom as flat and level as possible. Remove rocks, roots, and debris from the trench. If your soil is heavy clay, you may need to compact the trench bottom slightly. In sandy or loose soil, consider adding a thin layer of compacted gravel to create a more stable base.
Using Landscape Fabric
Landscape fabric under edging can reduce weed growth along the bed border, but it’s not a complete barrier against all weeds. If you choose to use it, lay the fabric in the trench before placing edging, leaving the top edge slightly below where mulch will sit. Overlap fabric sections by several inches at seams. Keep in mind that fabric may degrade over time and can sometimes interfere with drainage if installed incorrectly.
Leveling the Base
A level base prevents edging from sitting unevenly, which can create gaps where grass invades or cause water to pool. Use a level to check the trench bottom as you dig, making adjustments as needed. For stone or brick edging, a level base is especially critical since uneven pavers are difficult to correct once set.
Installing Plastic Landscape Edging
Plastic edging is one of the most popular DIY options due to its flexibility, low cost, and ease of installation.
Step-by-Step Installation
- Uncoil and position: Unroll the plastic edging along your trench. If it came rolled up, let it sit in the sun for a short time to make it more pliable and easier to work with.
- Place in trench: Set the edging into the trench with the lip or decorative edge facing up. The bottom flange or anchor should sit flat on the trench bottom.
- Handle curves: Plastic edging bends easily for curved beds. For tighter curves, make small relief cuts in the bottom flange to help the material conform without buckling.
- Stake it: Drive stakes through the anchor holes or against the edging at regular intervals. In straight sections, staking every few feet is typically sufficient. On curves, stake more frequently to hold the shape.
- Join sections: Most plastic edging systems include connectors or overlapping tabs to join sections. Follow the manufacturer’s method for creating a seamless connection.
- Backfill: Push soil back against both sides of the edging, tamping it down firmly to lock the edging in place.
Plastic Edging Considerations
Plastic can become brittle in cold temperatures, so installation in warmer months may be easier. In regions with freeze-thaw cycles, plastic edging may heave over time if not anchored deeply enough. It’s a practical choice for gardeners who want a quick, affordable solution and don’t mind potentially replacing it after several seasons.
Installing Metal Edging (Steel or Aluminum)
Metal edging offers a clean, modern look and greater durability than plastic. Installation is similar but requires some additional care due to the material’s rigidity.
Step-by-Step Installation
- Position sections: Metal edging often comes in straight sections. Lay them in the trench end to end, overlapping or connecting as the system requires.
- Cut to fit: Use tin snips for aluminum or an angle grinder for steel to cut sections to length or create curves. Always wear eye protection and gloves when cutting metal. File or sand any sharp edges after cutting.
- Create curves: Metal can be bent for gentle curves, though it requires more force than plastic. For tighter curves, you may need to make multiple shorter cuts and piece sections together.
- Stake or anchor: Drive stakes through pre-punched holes or use the system’s built-in anchors. Stakes should penetrate well below the trench bottom for secure hold.
- Connect sections: Use the manufacturer’s connectors or overlap sections as directed to create continuous edging.
- Backfill and compact: Fill soil back against both sides, tamping firmly to stabilize the edging.
Metal Edging Considerations
Steel edging may develop a rust patina over time, which many gardeners find attractive but which will eventually thin the metal if left unchecked. Aluminum won’t rust and maintains its appearance longer. Both metals resist impact well, making them suitable for areas near lawnmowers or foot traffic. Metal edging is a good long-term investment for gardeners who want durability with a refined appearance.
Installing Stone or Brick Paver Edging
Stone and brick edging creates a permanent, substantial border. The installation is more involved but results in a border that can last for decades.
Step-by-Step Installation
- Prepare the base: After digging your trench, add a layer of compacted gravel to create a stable foundation. The gravel helps with drainage and prevents pavers from settling unevenly.
- Add a setting bed: Spread a layer of sand over the gravel and level it with a straight board or level. This sand bed allows you to fine-tune paver height.
- Place pavers: Set each paver into the sand bed, tapping gently with a rubber mallet to level it. Check frequently with a level to ensure consistent height and alignment.
- Handle curves: Rectangular pavers can approximate curves by angling each piece slightly. For tight curves, you may need to cut pavers with a chisel or wet saw.
- Fill joints: Once all pavers are set, sweep polymeric sand or mortar into the joints. Polymeric sand hardens when wet and helps lock pavers together while resisting weed growth. Mortared joints create a more permanent bond but are less forgiving if you need to make adjustments later.
- Backfill: Fill soil against both sides of the pavers, being careful not to shift them out of alignment.
Stone and Brick Considerations
A properly prepared base is critical for paver edging—without it, pavers will shift, sink, or heave over time. In areas with significant frost, a deeper gravel base or even a concrete footing may be necessary to prevent movement. Stone and brick are heavy, so plan for the physical effort of transporting and placing them. The result, however, is a border that adds lasting value and beauty to your landscape.
Installing Wood or Timber Edging
Wood edging brings a natural, organic feel to garden beds. It’s accessible for DIYers with basic tools, though it does require some knowledge of wood selection and treatment.
Step-by-Step Installation
- Select your wood: Choose naturally rot-resistant species like cedar or redwood, or use pressure-treated lumber rated for ground contact. Untreated softwoods will degrade quickly in soil.
- Cut to length: Saw timbers to fit your bed dimensions. Pre-drill holes where you’ll drive stakes or rebar to prevent splitting.
- Position in trench: Lay timbers in the trench, keeping them level and aligned with your bed line.
- Secure with stakes: Drive rebar, long spikes, or wooden stakes through pre-drilled holes to anchor timbers in place. Stakes should penetrate well below the timber into undisturbed soil.
- Handle corners: For corners, you can notch timbers to overlap, use metal brackets, or simply butt them together and stake securely.
- Backfill: Fill soil against both sides of the timber, tamping firmly to eliminate gaps.
Wood Edging Considerations
All wood eventually degrades in ground contact, even rot-resistant species. You can extend its lifespan by ensuring good drainage around the edging and keeping mulch from piling directly against the wood. Wood edging is a good choice for informal gardens, temporary borders, or gardeners who enjoy the process of refreshing their landscape periodically.
Backfilling, Compacting, and Finishing Touches
These final steps apply to all edging types and are essential for a stable, attractive result.
Backfilling Properly
Push soil back against both sides of the edging in layers, tamping each layer firmly before adding the next. This eliminates air pockets and helps lock the edging in place. Avoid dumping all the soil at once, as this can shift the edging out of alignment.
Creating a Clean Mowing Edge
A slight bevel or gap on the lawn side of the edging makes it easier to mow right up to the bed without scalping the grass or damaging the edging. Some gardeners create a small trench or use a half-moon edger to define this mowing strip.
Adding Mulch
When mulching your bed, leave a small gap (about an inch) between the mulch and the edging. This reduces moisture wicking against the edging material, which can accelerate rot in wood or cause staining on stone. It also creates a cleaner visual line.
Maintenance and Troubleshooting
Even well-installed edging may need occasional attention. Here are common issues and how to address them.
Edging That Has Heaved or Shifted
Frost heave, poor compaction, or root growth can push edging out of position. To fix this, remove the affected section, re-trench if needed, and reinstall with deeper anchoring. Adding additional stakes or anchors can help prevent future movement.
Grass Invading Under Edging
Grass rhizomes can grow under or through gaps in edging. This often indicates the edging isn’t deep enough or there are gaps at joints. Re-seating the edging deeper, adding landscape fabric beneath, or sealing gaps with backfill material can help. Regular trimming along the edge also reduces encroachment.
Drainage Problems
Water pooling behind edging can push it out of alignment or create soggy conditions that harm plants. Ensure the backfill soil is permeable and that there are no obstructions blocking water flow. In some cases, adding a French drain or gravel channel behind the edging may be necessary.
Material Degradation
Wood will eventually rot, plastic may crack, and steel may rust through. When repairs are no longer practical, replacement is the best option. Choosing durable materials initially and maintaining them properly extends their useful life.
Final Thoughts
Installing flower bed edging is a rewarding DIY project that improves both the appearance and functionality of your garden. By choosing the right material for your situation, preparing the site carefully, and following proper installation techniques, you can create clean, lasting borders that define your beds and simplify lawn maintenance. Take your time with the preparation steps, and don’t hesitate to adjust your approach based on your specific soil, climate, and aesthetic preferences.
