Install Landscape Edging

Edging is the difference between a garden that looks intentional and one that looks like it happened by accident. A clean border between lawn and bed keeps mulch where it belongs, stops grass from creeping into your flowers, and gives you a mowing line that doesn't require hand-trimming every week. Done well, edging disappears into the landscape while doing heavy structural work. Done poorly, it heaves with frost, creates trip hazards, or looks like a black rubber snake someone dropped around the roses. The material matters less than the installation. Plastic flex edging costs eight dollars for twenty feet and lasts a decade if you trench it properly. Steel costs more and looks sharper but demands the same groundwork. The trick is depth and backfill. Surface-laid edging shifts with weather and foot traffic. Properly trenched edging stays put through freeze-thaw cycles and becomes part of the grade itself.

1. Map Your Border Perfectly. Lay out a garden hose or rope along your intended edge. Step back and check the curve from multiple angles, including from inside the house if the bed is visible from windows. Adjust until the line looks natural and provides clean mowing access. Mark the final path with landscape paint or flour.
2. Cut Clean Vertical Walls. Use a flat spade or edging tool to cut straight down along your marked line, going 4-6 inches deep. Remove the cut strip of sod and soil, creating a clean vertical face on the bed side. Keep the trench width just wide enough for your edging material plus an inch on each side for backfill.
3. Establish Your Foundation Base. Rake the trench bottom smooth and check it with a level, especially on sloped ground. The edging will follow this base line, so irregularities here become permanent dips and humps. Add or remove soil to create consistent depth. Tamp the bottom firm with your boot.
4. Position Edging at Mower Height. Place your edging into the trench with the top edge at final grade height — typically level with the lawn or slightly below. For plastic edging, overlap sections per manufacturer specs and secure with stakes every three feet and at all joints. For steel or aluminum, join sections with provided connectors and stake every two feet. Work in short sections, checking alignment as you go.
5. Stake Every Joint Securely. Drive stakes straight down through stake holes or directly behind the edging, angling slightly toward the bed side for maximum hold. Tap stakes until tops sit below the edging rim. On curves, place stakes on both the inside and outside to prevent twisting. Connect sections tightly to avoid gaps where grass can push through.
6. Tamp and Lock the Edge. Pack soil firmly against the lawn side of the edging, bringing it level with existing lawn grade. Tamp with your boot every few inches as you fill. This backfill carries the mower wheel and prevents the edging from shifting outward. Water lightly to settle the soil, then add more if needed.
7. Hide the Edging Rim. Add mulch or soil against the bed side of the edging to match bed grade. This second backfill locks the edging from the opposite side and hides the material edge. Slope bed material slightly away from the edging to prevent mulch from washing over it during rain.
8. Inspect and Finalize Everything. Walk the entire edge, checking for high spots, gaps, or loose sections. Press down on the edging every few feet to confirm it's solidly anchored. Trim any grass overhanging from the lawn side with shears. Water the backfilled areas thoroughly to settle everything, then make final adjustments before the soil hardens.