How to Install Metal or Paver Edging for Clean, Defined Garden Beds
Define garden beds and keep mulch in place with rigid metal or paver edging. Step-by-step instructions for a crisp, long-lasting border.
Difficulty
beginnerTime
3–5 hours
Est. cost
$50–$120
Tools you'll need
- Cordless drill driver
- Circular saw with masonry blade (for paver edging)
- Rubber mallet
- Shovel and spade
- Level
- Tape measure
- String line and stakes
- Safety glasses and work gloves
Materials
- Metal landscape edging or heavy-duty paver edging (enough for the bed perimeter)
- Stakes or spikes (typically included with edging)
- Crushed stone or paver base (approx. 2–3 cubic feet per 10 linear feet for 6-inch-wide trench)
- Pea gravel or sand for leveling
- Soil or sod for backfill
- String and wood stakes
Step-by-step
- 1
Plan the bed outline and mark it with string
Walk the intended line of the bed and use stakes and string to mark the exact perimeter. For a straight run, pull the string tight and check it with a level. For curves, use a garden hose as a flexible guide. The string gives you a reference to dig against and ensures the final edge is consistent. Measure the total linear footage of the bed, then buy edging a foot or two extra to allow for cuts and waste.
- 2
Dig a narrow trench along the string line
Cut a sharp, straight side with a spade or flat shovel, following the string closely. The trench depth depends on the edging: metal edging typically needs 4–6 inches deep, paver edging about 2 inches deeper than the paver height. For a 6-inch-wide trench, dig about 6 inches wide to allow easy placement. Slope the trench bottom slightly away from the bed for drainage. Remove all sod, roots, and stones from the trench floor.
- 3
Compact the trench base with crushed stone
Spread a 1- to 2-inch layer of crushed stone or paver base across the bottom of the trench. Tamp it firmly with a hand tamper or the end of a 4x4 post. This base creates a stable foundation that resists frost heave and keeps the edging level. For paver edging, a well-compacted base is critical to prevent settling. Wet the stone slightly to help compaction.
- 4
Install the edging sections and connect them
Set the first section of edging into the trench, pressing it into the base. For metal edging, align the top edge with the string line. Drive one or two stakes through the edging’s holes or slots into the ground using a rubber mallet or hammer. For paver edging, connect tongue-and-groove ends by tapping gently with a rubber mallet. Check each section for level and alignment before moving on. Overlap metal sections according to the manufacturer’s instructions and fasten them with the provided connectors.
- 5
Check level and adjust with sand or gravel
Place a level across the top of the edging and adjust height by adding or removing base material underneath. The goal is a continuous line that is level or slopes subtly for drainage (1/8 inch per foot is plenty). Use pea gravel or sand under low spots, and tap the edging down at high spots. Recheck alignment with the string.
- 6
Backfill the trench and compact the soil
Fill the trench on both sides of the edging with the excavated soil, or a soil-compost mix for better drainage. Tamp the soil firmly with your foot or a tamper, then water lightly to settle it. Add more soil if needed and compact again. For paver edging, the top of the edging should end up flush with the finished soil level so mowers and trimmers can ride over it.
- 7
Finish with landscaping fabric and mulch or grass sod
If the bed is new, lay landscape fabric behind the edging to block weeds, then cover with mulch or soil. On the lawn side, backfill the trench flush with the turf and lay new sod or reseed if the trench disturbed the grass line. Trim any edging that protrudes above the soil with a hacksaw or angle grinder, then sweep the area clean. The edging is now ready to define your beds for years.
Planning your edging project
Before you dig, measure the entire perimeter of the bed you want to edge. Add at least 10 percent for overage, and buy all materials at once to avoid color or profile mismatches. Metal edging (steel or aluminum) offers the cleanest lines and will last decades if galvanized or powder-coated. Paver edging, made from concrete or plastic, is heavier and works best for straight runs or gentle curves but can crack if installed over an uneven base.
Choose a dry weekend for installation. Wet soil is easier to dig but harder to compact, and it can slump after installation, throwing your edging out of level. If the bed is currently grass, decide whether you want the edging flush with the lawn (for mowing) or raised slightly (to contain mulch). A 1-inch reveal above grade is a common choice for metal edging.
Estimating materials
For a typical 50-foot bed, you need:
- 50 linear feet of edging (buy 55 feet to be safe)
- 1 bag of stakes (20–30 stakes, depending on spacing)
- 2 to 3 cubic feet of crushed stone or paver base
- 1 cubic foot of pea gravel or sand for leveling
- A tamper or heavy post
Choosing between metal and paver edging
Metal edging, whether steel or aluminum, provides a nearly invisible barrier that keeps grass and mulch separate without drawing attention to itself. It is ideal for modern landscapes where clean lines are paramount. Steel edging is extremely durable and resistant to bending, while aluminum is lighter and won't rust. Both can be bent into gentle curves by hand or with a simple edging bender tool. For tight curves, make relief cuts with a hacksaw every few inches, then bend and stake.
Paver edging, on the other hand, creates a visible border that can complement the hardscape of a walkway or patio. It is typically made from concrete or heavy-duty plastic. Concrete paver edging is very strong but requires a solid base to prevent cracking. Plastic paver edging is lighter and easier to cut but may become brittle in extreme cold. Paver edging is best for straight runs or large-radius curves, as it does not conform to tight bends.
Mistakes to avoid
The most common mistake is skipping the base layer. Edging set directly on soil will heave with frost and settle unevenly after rain. Always add 1 to 2 inches of compacted crushed stone. The second mistake is not checking level frequently. A slope that looks fine from one end can produce a wavy mess. Use a 4-foot level every 4 feet. The third mistake is using too few stakes. For metal edging, drive a stake every 2 to 3 feet, and at every joint. Fourth, failing to overlap metal sections correctly can lead to gaps where weeds enter. Follow the manufacturer's overlap guidelines, usually 1 to 2 inches. Finally, do not forget to call your local utility marking service (e.g., 811 in the US) before you dig—especially if you plan to stake deeper than 6 inches.
Safety
Wear safety glasses and heavy gloves when handling metal edging—the cut edges can be razor-sharp. When using a circular saw with a masonry blade to cut paver edging, wear hearing protection and a dust mask; silica dust is a respiratory hazard. Do not cut metal edging with a saw unless it is specifically rated for metal; use a hacksaw or angle grinder instead. Keep bystanders and pets away from the work area, especially during cutting. When compacting base materials, lift with your legs, not your back, to avoid strain. If you encounter buried cable or pipe, stop work and consult your utility locator maps.
Final touches
Once the edging is in and backfilled, stand back and inspect the line. Walk the entire bed and fix any dips or bows by tapping the edging with a rubber mallet. Sweep excess soil away from the top edge, and if desired, spray the edging with a hose to knock off dirt. Your edging will now define crisp garden beds, keep grass from invading, and provide a clear boundary for mulching and mowing for years to come. A well-installed edge not only looks professional but also reduces maintenance time by preventing grass from creeping into beds and keeping mulch where it belongs.
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Frequently asked questions
- How deep should the trench be for metal edging?
- Most metal landscape edging is 4 to 6 inches tall, and the trench depth should match the height of the edging you choose, minus a 1-inch reveal above ground. For a 4-inch edging, dig the trench 3 inches deep. For a 6-inch edging, 4 to 5 inches deep works well. The exact depth also depends on whether you want the top edge flush with or proud of the soil.
- Can I install edging without digging a trench?
- Some thin metal edging can be driven directly into soft soil, but for a permanent, straight border, a trench is strongly recommended. Without a trench, the edging will likely heave or shift during the first freeze-thaw cycle. Digging a trench and adding a base layer ensures stability and a professional look.
- What is the best type of edging for curved beds?
- Flexible metal edging (steel or aluminum) is the best choice for curves because it can be bent by hand to follow gentle arcs. Paver edging is less flexible but available in radius sections for gradual curves. For tight radiuses, consider using a heavy-duty plastic or rubber edging that accepts stake anchors.
- How long should the edging stakes be?
- Stakes should be long enough to penetrate at least 6 inches into undisturbed soil below the trench base. For standard metal edging, 8- to 10-inch stakes are typical. If your soil is sandy or loose, use 12-inch stakes for extra holding power. Drive stakes straight down or angled slightly away from the bed for maximum resistance.