How to attach a garden arch

Key points at a glance

For most garden soils, securing with ground anchors is sufficient – a quick and stable solution without extensive excavation work.
Stability depends on the choice of location, the nature of the ground, and the correct installation depth of the anchors.
Longevity is ensured by high-quality materials, such as those used in metal rose arches by ELEO Garden, and careful installation.

A garden arch only achieves its full aesthetic effect when it stands absolutely secure: perfectly aligned, stable, and resistant to wind. There is often uncertainty about the correct fixing method. Is a concrete foundation absolutely necessary? How deep must a ground anchor be set, and which solution is suitable for lawn, gravel, or a paved patio? This guide explains clearly and comprehensibly how to erect and reliably anchor a garden arch – without specialist knowledge or unnecessary construction work. It examines when ground anchors are the optimal solution, in which cases a foundation is unavoidable, and how already wobbly structures can be stabilised after the fact.

Before Erecting – What You Should Know

Before the actual garden arch installation begins, careful planning is essential. The best anchoring technique is of little use if the location is poorly chosen or the ground proves unsuitable. Thorough preparation saves time, prevents a crooked installation, and ensures a permanently satisfactory result.

Choosing the Right Location – Sun, Sightlines, Spacing

A garden arch is often more than just a climbing aid; it serves as a design feature, a passageway, and a focal point. An ideal location therefore fulfils several criteria:

Light and Air Circulation: Roses, clematis, and most other climbing plants require a sunny to partially shaded spot with good ventilation. This not only promotes growth but also helps prevent fungal diseases, as leaves can dry quickly after rain. A location between dense hedges is therefore often unsuitable.
Visual Impact and Sightlines: A garden arch has its greatest effect when it emphasises a sightline in the garden. It can frame a path, mark the transition between two garden areas, or visually define a seating area. This creates an inviting garden-gate feeling.
Sufficient Space and Freedom of Movement: Enough distance from walls, paths, and other plants should be planned in. This not only makes garden tasks such as mowing and pruning easier, but also gives plants room to spread without blocking the passageway.

The Calabria Garden Arch staged against a wall in an uncoated finish

A practical tip for visualisation: the position of the four feet can be marked with small wooden pegs. This allows you to check in advance whether the passageway is wide enough and whether the placement looks harmonious within the overall garden design.

Which Fixing Method Suits Your Ground?

The type of fixing depends largely on the existing ground surface. Whilst ground anchors are in many cases the most straightforward yet stable solution, solid surfaces such as paving or concrete slabs require special fixing techniques. The following table provides guidance.

Ground Surface	Recommended Method	Technical Rationale
Lawn / established bed soil	Ground anchors	Good load transfer into the firm, established ground; minimal disturbance to the garden structure.
Paving slabs / block paving	Heavy-duty anchors (in the sub-base) or base plates with bracket	The load is distributed across the load-bearing sub-base (e.g. hardcore, concrete), not onto individual loose stones.
Patio (concrete/stone slabs)	Special brackets for bolting down or base plates	A secure bolted fixing into the solid substrate provides defined stability and a clean, safe finish.
Gravel / chippings	Long ground anchors (reaching the load-bearing layer) or a concrete pad foundation	A loose gravel layer alone offers no hold. The anchor must be fixed in the firm soil layer beneath.

To check soil firmness, a simple test with a spade is recommended. If the soil beneath the turf is firm and loamy, ground anchors are generally the ideal choice. For very sandy, loose, or permanently wet soil, a concrete pad foundation may be the more durable and reliable alternative.

View our garden arches

Erecting a Garden Arch with Ground Anchors – the Simplest Solution

For the majority of gardens, anchoring a garden arch with ground anchors represents the optimal balance of stability, effort, and aesthetics. Major excavation work is avoided, the installation is nevertheless extremely sturdy, and later adjustments remain possible. What is decisive for success is not the force applied, but a precise fit, the correct depth, and exact alignment.

What You Need – Tools & Materials

Good preparation makes the garden arch installation considerably easier. When all tools and materials are to hand, the work proceeds swiftly and precisely.

Tools

Tape measure and string line (for precise alignment)
Spirit level (at least 60 cm in length for accuracy)
Rubber mallet (protects the anchor coating) or sledgehammer
Spade or hand earth auger (makes pre-drilling easier in firm soils)
Spanner suited to the connecting elements

Materials

Ground anchors compatible with the garden arch model
Some gravel or hardcore (optional, for drainage)
Screws/nuts as specified in the installation instructions
Wooden wedges (for temporary fixing and alignment)

For metal garden arches, it is always advisable to consult the manufacturer's enclosed instructions. For ELEO Garten products, detailed installation guides are also available, containing valuable advice on alignment and fixing points.

Step by Step – How to Set Ground Anchors Correctly

A systematic approach is essential for a permanently stable fixing. The work is best carried out by two people: one holds the arch in position whilst the other carries out the anchoring.

Mark the position: Place the garden arch at its final location and mark the position of the feet precisely. A string line helps to check the alignment with the garden path or house wall.
Prepare the ground: Remove the turf at the marked points. For very firm, loamy soil, a small pilot hole made with a spade or earth auger can make driving the anchors in easier.
Position and drive in the anchor: Set the ground anchor at exactly the right angle – perfectly vertical. An anchor set at an angle is almost impossible to correct later. Work with controlled, even strokes and periodically check the vertical alignment with a spirit level.
Add drainage (optional): In heavy, wet soils, a small layer of gravel in the hole prevents waterlogging and improves the longevity of the fixing.
Install the garden arch: Insert the feet into the anchors and tighten according to the instructions. Initially tighten the bolts by hand only, to allow for adjustments.
Align precisely: Use a spirit level to align the garden arch in all directions (vertically and horizontally). Only when everything is perfectly positioned should the bolts be fully tightened.
Stability check: Test the firmness of the fixing by carefully pushing and pulling on the arch. A minimal amount of give in the soil is normal; however, any noticeable tilting or wobbling must not occur.

How Deep Should the Anchor Go? – the Most Important Question During Installation

The optimal installation depth is not a fixed value, but depends on the soil conditions and the local climate. As a general rule: the anchor must reach a load-bearing, compacted layer of soil in order to withstand the leverage forces of wind. In regions with harsh winters, the anchor should ideally reach or go below the frost line (approx. 60–80 cm). This prevents freezing water in the soil from pushing the anchor upwards (known as frost heave).

The following criteria serve as guidance:

Firm, loamy soil: A shallower depth is often sufficient here, provided the anchor sits firmly and allows no movement.
Sandy or loose soil: The anchor must be set considerably deeper in order to reach a firm layer. The soil around the anchor should be additionally compacted after insertion.
High wind load: In exposed locations, such as open fields or between buildings, strong wind forces are at work. Here, maximum anchoring depth is essential for safety.