How to Install Steel Garden Edging: A Guide to Groundline

Installing steel garden edging is one of the simplest ways to transform a garden. Crisp edges instantly define lawns, paths, gravel and planting beds, creating a cleaner and more professional finish.

Groundline Garden Edging has been designed to make that process straightforward. Manufactured in Britain, the modular system uses 2m steel panels that can form both straight lines and flowing curves, making it suitable for homeowners, landscapers and garden designers.

Whether you're refreshing a lawn edge or landscaping an entire garden, here's how Groundline works.

Groundline Installation

Groundline is designed for fast, straightforward installation with minimal tools and no specialist equipment.

Simply mark out the edge of your lawn, planting bed or pathway, using a string line for straight runs. Drive the ground posts into position with a mallet, slide the steel panels together using the integrated connection system, then secure them to the posts.

For a full step-by-step guide, watch our installation video or download the installation guide.

Installing onto concrete or another solid foundation? Use the Groundline Triangle Support with suitable concrete fixings for a secure installation.

Straight or Curved Garden Edging?

One of Groundline's biggest advantages is its flexibility.

The same system can create:

• Straight lawn borders
• Sweeping curves
• Circular planting areas
• Square and rectangular borders
• L-shaped and U-shaped designs
• Organic, flowing garden layouts

This means you don't need a completely different product every time the direction of the landscape changes.

For particularly tight curves, additional preparation may be required depending on the radius.

Which Groundline Finish Should I Choose?

Your finish has a major impact on the final appearance of your garden.

Corten Steel

Corten garden edging develops its distinctive warm, weathered patina naturally over time.

Best for: natural planting, gravel gardens and contemporary landscapes.

Its rich colour works particularly well against green planting, stone and gravel.

GEO tip: Consider weathering runoff when positioning Corten directly beside pale paving or porcelain.

Powder-Coated Steel

Powder-coated Groundline provides a clean architectural finish and greater colour flexibility.

Best for: contemporary gardens, porcelain paving and landscapes where the edging needs to coordinate with surrounding materials.

Choose from a range of RAL colours to make the edging either disappear into the landscape or become part of the design.

Stainless Steel

For projects requiring a premium metallic appearance, stainless steel creates a crisp, contemporary finish with excellent corrosion resistance.

Best for: luxury gardens, architectural landscapes and premium outdoor spaces.

What Height Garden Edging Do I Need?

Choosing the correct height depends on what the edging needs to do.

50mm — subtle, low-profile definition.

75mm — ideal for neat lawn edges and shallow borders

100mm — ideal for many lawn, flower bed and pathway applications.

150mm — greater definition and material separation.

200mm — deeper borders and applications requiring additional height.

For raised planting above this level, consider the Contour Raised Bed System. For structural soil retention or significant level changes, look at ANCO Steel Retaining Walls instead.

How to Order Groundline

Ordering is straightforward.

1. Measure your garden
Calculate the total length of edging required.

2. Choose your height
Select the Groundline height that suits the application.

3. Choose your finish
Decide between Corten, powder-coated or other available finish options.

4. Check your fixing conditions
Standard installations use ground stakes. Solid surfaces may require triangle supports and appropriate concrete fixings.

5. Order your Groundline
Panels are supplied in standard lengths with the required standard components included in the relevant pack.

Do I Need Any Extra Groundline Accessories?

Most standard installations include the components required for installation, but your project may need additional accessories.

Consider whether you require:

• Triangle supports
• Extended ground stakes
• Concrete fixings
• Additional supports

If you're unsure, send GEO a photograph, sketch and dimensions of your project and the team can help identify what you need.

Why Choose GEO Instead of Fabricated Steel Edging?

A local fabricator can manufacture strips of steel.

Groundline is different because it has been designed as a complete garden edging system.

Rather than designing connections, supports and edge details from scratch for every project, Groundline provides a repeatable solution engineered specifically for landscaping.

That means:

• Consistent panel connections
• Rolled top detailing
• Straightforward installation
• Less site fabrication
• Predictable ordering
• Professional finished appearance
• Technical support when required

For homeowners, that makes installation easier.

For professional landscapers, it can mean less time spent designing, ordering and modifying steel on site.

Is Groundline Right for Every Project?

Groundline is designed for low garden edging, not every type of soil retention.

For raised planting between approximately 200–600mm, Contour Raised Beds may be more appropriate.

For significant level changes requiring structural retention, use an engineered solution such as ANCO.

Choosing the right GEO system for the application gives you a better finish and ensures the system performs as intended.

Why Choose GEO?

GEO designs and manufactures premium steel landscaping systems in Britain, combining engineering experience with products designed specifically for real landscaping challenges.

Groundline is British-made, patent-protected and backed by a 20-year guarantee, giving homeowners and professionals confidence that they're investing in a system designed for long-term outdoor use.

Our team is also here when you need us — from choosing the right edging height and finish to working out the accessories required for your installation.

Frequently Asked Questions

Is steel garden edging easy to install?

Yes. Groundline is specifically designed for straightforward installation using modular panels and ground stakes, with minimal tools required.

Can Groundline create curved garden edging?

Yes. Groundline can form both crisp straight runs and smooth curves, giving you flexibility when designing lawns, paths and planting areas.

Does steel garden edging need a concrete foundation?

Not for most Groundline installations. Standard installations use ground stakes. Appropriate concrete fixings can be used when installing onto a suitable solid surface.

What is the best finish for steel garden edging?

Choose Corten for a natural weathered appearance, powder coating for colour flexibility or stainless steel for a premium contemporary finish.

What height steel garden edging should I choose?

Groundline is available from 50mm to 200mm. Lower heights work well for subtle lawn definition, while taller options provide greater material separation.

How long does Groundline garden edging last?

Groundline is designed for long-term outdoor performance and GEO backs the system with a 20-year guarantee.

Can homeowners install Groundline?

Yes. Groundline has been designed for straightforward installation by both homeowners and professional landscapers.

Create Better Garden Edges with Groundline

A beautifully finished garden starts with the details.

Whether you're creating a crisp lawn edge, defining a gravel path or introducing sweeping borders around planting, Groundline Steel Garden Edging gives you the freedom to create clean, professional lines without making installation complicated.

British made. Simple to install. Built to last.

Explore the Groundline Garden Edging Collection, watch the installation video or speak to the GEO team for help planning your project.