Garden Edging Ideas for Ontario (2026): What Survives Frost, and What It Costs

Edging is the cheapest thing that makes a yard look designed. A crisp line between lawn and bed tells people the garden is cared for, keeps mulch and stone out of the grass, and stops the lawn creeping into the bed. In Ontario the hard part is not choosing a look. It is picking an edge that is still in the same place after the ground has frozen and thawed a few dozen times. This guide covers the garden edging ideas we install across Hamilton, Burlington and Oakville and what each costs.

Garden edging compared

Prices include excavating the edge line, the edging itself and a gravel base where needed. They do not include new mulch or plants. For a whole bed, a planted and mulched garden bed runs about $19 to $46 per square foot installed, as covered in our front yard landscaping ideas guide.

Why edging heaves in Ontario

Frost heave is the enemy of edging. When wet soil freezes, it expands and pushes up anything anchored in the top few inches. When it thaws, the soil settles back but the edging does not, so each winter it rises a little further. That is why plastic edging that looked perfect in June is sticking up like a ribbon by the second spring. Three things stop it:

• Depth. Edging that goes 4 to 6 inches deep, with long stakes, holds much better than a shallow roll.
• Drainage. Heave is worst in wet clay. A few inches of gravel under a paver or stone edge lets water drain away before it freezes.
• Weight and stiffness. Steel, aluminum and heavy stone resist being pushed up. Light plastic does not.

Much of the Hamilton area sits on heavy clay, which holds water and heaves more. Our guide to planting in Ontario clay soil has more on working with it.

Garden edging ideas

1. Steel edging for a clean modern line

Steel edging is a thin strip, usually 4 to 6 inches deep, that almost disappears and leaves a sharp line between lawn and bed. Corten or weathering steel rusts to a brown finish that suits modern gardens, and black powder-coated steel or aluminum suits everything else. It bends into smooth curves and lasts decades. This is what we install in most new beds.

2. Aluminum edging

Aluminum does the same job as steel, is lighter and does not rust, and it is what we use along paver patios and walkways, where it also acts as the edge restraint that stops the pavers spreading. Brands such as Permaloc interlock at the joints so the line stays continuous.

3. A paver mowing strip

A single row of pavers laid on edge or flat along the bed, on a gravel base, gives the mower wheel something to ride on, so you do not need to trim along the bed. It costs more than metal but can save a trim every week of the season. Match the pavers to your patio or walkway to tie the yard together. Our paver selection guide helps with colour and finish.

4. Natural stone and armour stone

Flat fieldstone or cut limestone laid along a bed suits cottage gardens, older homes and informal borders. Larger pieces of armour stone can edge a raised bed and hold back soil at the same time. Small stones set loosely on the soil are the one version that does not work well: they shift, sink and let grass through the gaps.

5. The spade-cut edge

A trench about 4 inches deep cut with a flat spade, with the bed side sloped back, is the classic English border edge. It costs nothing but time, looks natural and never heaves. The trade-off is upkeep: grass grows back into it, so it needs recutting in spring and once or twice in summer. It is a good choice if you already enjoy working in the garden.

6. Brick or clay edging

Brick set on end in a sawtooth or soldier pattern suits heritage homes in Hamilton's older neighbourhoods and Oakville's Old Town. Use bricks rated for exterior ground contact: ordinary house brick can spall after a few freeze-thaw cycles.

7. Raised bed walls

Where a bed sits above the lawn, a low wall of stone, block or timber becomes the edge. Keep timber walls in cedar or pressure-treated wood rated for ground contact, and expect wood to need replacing long before stone.

8. Edging that keeps stone out of the lawn

Beds of river rock or gravel need a solid edge more than any other bed, because stones migrate into the lawn and hit the mower. Use steel, aluminum or pavers set a little above the lawn height. See our guide to landscaping rocks and rock gardens.

How to install metal edging that stays put

1. Mark the line with a hose or spray paint, and live with it for a day before you cut. Smooth, wide curves look better and are easier to mow than tight wiggles.
2. Cut a trench along the line with a flat spade, about as deep as the edging, 4 to 6 inches.
3. Set the edging in the trench with the top about half an inch above the lawn side.
4. Drive the stakes at the spacing the maker specifies, usually every 2 to 3 feet, angled slightly toward the bed.
5. Backfill and tamp both sides firmly so there are no air pockets for water to sit in.
6. Mulch the bed to just below the top of the edge. Our guide to when to mulch garden beds covers timing and depth.

Before you dig any long trench, book free locates through Ontario One Call. Gas, cable and irrigation lines often run only inches below the lawn.

Edging mistakes we fix most often

• Plastic edging sticking up after a few winters, usually because it was only an inch or two deep.
• Loose stones set on the soil with grass growing between them.
• Edges that are too high, which trip people and get scalped by the mower.
• No edge at all around rock beds, so stone ends up in the lawn.
• Tight curves that the mower cannot follow, which leave a strip of grass to trim by hand.

Get My Free Quote

Frequently asked questions

• Our garden building service
• Front yard landscaping ideas
• Low maintenance backyard ideas
• When to mulch garden beds
• Mulch and topsoil calculator

Get My Free Quote