There are several key structures I use in every kitchen garden I design for clients. One is the raised bed, of course, but another essential element is the garden border.
Borders separate the garden from the surrounding landscape and prevent grass or other vegetation from encroaching. They also help contain whatever material you're using around your beds, whether it's gravel, mulch, or soil.
There are many garden edging options-brick, stone, plastic, or rubber-but I personally love Corten steel edging. It's more affordable than brick or stone, has a slim profile that blends seamlessly with the landscape, and is far more durable than plastic or rubber.
Corten steel edging is perfect for creating clean, defined borders between your lawn and your kitchen garden. Here's what to consider when purchasing Corten steel garden edging, along with a step-by-step installation guide.
What to Look for When Buying Corten Steel Edging
Ground Spikes: Choose edging with integrated spikes. These make installation easier and keep the edging securely in place over time.
Height: Aim for at least 5 inches. This allows you to bury the edging deep enough to block grass while leaving enough aboveground to contain soil, mulch, or gravel.
Steel Gauge: Look for thick-gauge Corten steel for maximum durability. Landscaping supply stores often carry thicker steel than big-box stores. Invest in the thickest material within your budget.
Locking System: Edging that slides together without connector clips ensures a smooth, continuous line that looks like a single piece surrounding your garden.
Color Options: Corten steel naturally develops a rust patina over time, but some products are available in finishes like brown, black, or slate to match your garden style.
I use 16-gauge powder-coated Corten steel in my Nashville garden projects. Each piece is strong, durable, and designed for easy installation.
Tools & Supplies Needed
Edging shovel or manual edging tool
Tape measure
Stakes and string or spray paint
Small saw or cut-off tool (for shaping corners)
Rubber mallet
Pencil or chalk
Block of scrap wood
Optional: a helper to make installation easier
Using a simple manual edging tool allows you to create a clean, deep trench for your Corten steel edging.
How to Calculate How Much Edging You Need
Measure the perimeter of your garden.
Divide the total length by the coverage of your Corten steel pieces.
Keep in mind that many pieces overlap slightly to form a secure connection. For example, five 39-inch sections with a 2-inch overlap will cover approximately 15.5 feet.
Step-by-Step Installation Guide
Step 1: Mark the Border
Use stakes and string or spray paint to mark a straight line along the garden edge.
Ensure the string is level and tightly pulled to guide installation.
Check measurements along the length and width to maintain consistency.
Step 2: Dig a Trench
A trench makes installation easier and allows the Corten steel to sit deep enough for a low-profile finish.
The trench doesn't need to be wide-just enough to slide the edging in.
Digging first requires less force and helps avoid bending or damaging the steel.
Step 3: Connect Edging Pieces & Slide into Trench
Start at a corner for best results.
Some corners may require a small cut to shape the steel, while most can be bent around a block or brick.
Use a mallet or hammer to gently form corners and secure stakes.
Place the next piece and continue around the garden, connecting pieces as you go.
Tip: Place a scrap piece of wood between the mallet and steel when hammering to avoid denting the edging.
Why Choose Corten Steel for Your Garden
Durable & Long-Lasting: Can withstand weather, soil, and foot traffic.
Low Maintenance: The natural patina protects the steel, requiring minimal upkeep.
Stylish & Modern: Clean lines or gentle curves enhance the aesthetics of your garden.
Safe for Vegetables: The rust patina is stable and doesn't leach harmful substances into the soil.
Corten steel garden edging is the perfect solution for durable, elegant, and low-maintenance kitchen gardens. With the right materials and proper installation, it will create clean, lasting borders that elevate the overall look of your landscape.
