Installing lawn edging successfully requires marking a consistent border, digging a trench to the material’s specified depth, setting the edging level with proper anchoring, and backfilling with firm compaction.
The trick is that the method changes with the material—plastic edging installs differently than stone, and wood follows its own rules. Get the trench depth and anchoring right, and your edges stay clean for years. Here is exactly how to handle every common material.
What You Need Before You Start
The tools and materials depend on your edging type, but the planning steps are universal. A garden hose or spray paint marks the border—use it to define curves or straight runs before you dig. Measure your planned border and add 10 percent to the total length before buying material; running short mid-project is the most avoidable mistake. For the trench, you need a flat spade or a specialist border tool if your soil is dry and hard. Always wear gloves.
Installing Lawn Edging by Material
Each edging material has its own trench depth and anchoring method. The table below summarizes the specifications so you can pick the right approach for your project.
| Material | Trench Depth | Anchoring Method |
|---|---|---|
| Plastic edging | 6 inches (depends on product height) | Stakes every 7 inches; 3 inches from ends and each side of joins |
| Metal/composite edging | Depth of edging plus 1–2 inches for base material | Spikes 24–36 inches apart on straight runs, closer on curves |
| Wood (2×4 or 2×6 lumber) | Deep enough to bury half the board’s height | 12-inch wooden stakes every 4 feet; boards nailed to stakes |
| Stone or paver edging | 3–4 inches deep, roughly 6 inches wide | Leveling sand base; rubber mallet to set pavers |
| Concrete edging | Wider and deeper than other materials | Temporary wood forms; gravel base; 3-day cure |
For plastic edging, place the strip so it curves away from the lawn side and any V-shaped lip faces the flower bed. Use a utility knife for clean cuts. If you are working with metal edging, allow tiny gaps at connectors on long runs to account for thermal movement—without them, straight sections may buckle in summer heat. Wood edging is best for straight runs; for curves, use pliable bender board soaked in water, nailed to stakes on the outside of the lawn area. Stone pavers need a consistent sand bed—use a long level on straight sections and a torpedo level on curves. For concrete, dig a wider trench, build a form from 2×4 lumber and stakes, add gravel, pour, screed, and let it cure for three full days before stripping the forms.
Step-by-Step Installation Process
Every installation follows the same five-stage workflow once you have chosen your material. Mark the border first with your hose or spray paint. Dig the trench to the correct depth from the table above, keeping the bottom consistent—an uneven trench makes the edging wavy. Set the edging so the top is flush with or slightly above the lawn grade; if it sits too high, mower blades will catch it. Secure it with the recommended stakes, spikes, or connectors for your material. Finally, backfill the soil and tamp it firmly—loose backfill is the main reason edging shifts and creates uneven lines.
For stone or paver edging, pour a 1-inch sand bed into the trench and level it before setting each paver. Tap stones down with a rubber mallet and check alignment with your level before moving to the next. On metal edging, drive stakes within 24 inches of each other on curves to prevent the strip from springing back.
If you are shopping for stakes or connectors, our top-rated lawn edging stakes roundup covers durable options for plastic, metal, and wood edging systems.
Common Mistakes to Avoid
The most frequent errors are easy to prevent. Not buying enough material is the top one—always add 10 percent. Inconsistent trench depth creates a wavy finish, so check depth as you go. Setting edging too high exposes it to mower damage; only the very top should be visible. Poor compaction after backfilling leads to shifting within weeks—tamp soil on both sides firmly. On curves, work slowly in small increments to avoid kinks or gaps. If you are hammering stakes, do so from the flowerbed side at as close to 90 degrees as possible.
References & Sources
- The Home Depot. Landscape Edging Installation Guide Covers planning, trench depth, connector placement, and backfilling for standard edging products.