How Long Do Corten Steel Planter Last

Corten steel planters are now extremely popular in gardens across the UK and Europe. With their distinctive rustic look, they are increasingly finding their way into commercial and residential gardens. Whether it's a sophisticated patio in the city or a cosy little garden in the countryside, metal planter boxes have a distinctive charm.

I. The Benefits of Steel Corten Planters

High Durability

• Upon exposure to moisture in the air, Corten steel forms a natural protective layer. What appears to be a rusty outer layer is actually effective against further corrosion.
• Metal planter box is so strong and durable that you don't have to worry about damaging the pots during everyday gardening activities, such as moving plants and digging up roots, and you can move the placement frequently without any problems.
• Can easily cope with all kinds of weather, especially in the UK's changing climate, and can stand up to the wind and rain all year round.

Easy maintenance

• Compared with other materials such as wood and plastic, there is no need for maintenance such as painting or sanding.
• Combining multiple metal box planter is a good choice if you want to create a flourishing garden that doesn't require frequent care. There are many practical experiences shared by landscape designers and gardening enthusiasts on the Internet that can provide you with inspiration.

Environmentally friendly

• The natural rusting process kicks in during the first three to six weeks of being placed outdoors, and there is no need to use toxic chemicals for colouring.
• The protective layer formed prevents further corrosion, eliminating the need to treat with substances that could damage surrounding flora and fauna.
• Long service life and reduced horticultural waste.

Corten steel is 100% recyclable.

• Planting lavender, mullein and marshmallow in pots can provide help for endangered bees, and planting drunken weed and Sedum spp. can attract local butterflies.
• It is recommended to plant local flowers and greenery to reduce extra watering for a win-win protection of the planet.

 

II. How Long Do Corten Steel Planters Last?

General Life Span

• Corten steel planters will last at least 25 years or more, even in harsh environments.

Factors Affecting Life Expectancy

• Drainage: For Corten steel, wet and dry circulation is important. Poor drainage will accelerate rusting and it is recommended that an inexpensive emulsion sealant be applied to the inside of the planter.
• Climate: It can withstand extreme high or low temperatures, but avoid coastal or salty environments, as salt prevents the formation of a protective layer and accelerates rusting.
• Steel thickness: The thicker the steel, the longer the service life. The recommended minimum thickness is 1/8 inch (11 gauge), thicker steel is more effective, but the cost will increase and corten steel planter has no warranty.

 

Self-Healing Properties

• If Corten steel is damaged or scratched, a rusty substance will quickly cover the visible marks. The rust layer has anti-corrosion properties and can be used as a protective coating.

Construction disadvantages

• If you build the planter by yourself, special welding techniques are required. Since it has to bear the weight of plants and soil, it is important to make sure that the welds are secure.

 

III. Tips For Installing/Using Corten Planters

Rust Water Problem

• Rust water is part of the weathering process.
• Concrete, stone or brick surfaces under and around planters are difficult to clean.
• Although it is not possible to prevent rust water from arising, measures can be taken to direct drainage and avoid staining of delicate surfaces.

Applying Polyurethane Coating

• Applying a two-component polyurethane coating to the inside of the planter provides an additional layer of protection against corrosion.
• Metal trough planter helps the steel to achieve good wet and dry cycles and extends the service life of the planter.

Use of Foam Lining

• It protects plants from extreme weather.
• Can be used alone or in combination with an inner coating to provide additional insulation for plants.

IV. How to Assemble a Corten Steel Planter Box?

Kit Components

• Each metal outdoor planter boxes kit from AHL Corten Group includes 4 side panels, all screws, and optional base plate.

Assembly Process

• The side panels have folding tabs at the top and a flat bottom to distinguish the top from the bottom.
• Interlock the side panels, make sure the corners are flat, and then fix them with screws.
• To facilitate assembly, it may be necessary to pre-drill holes and measure and mark them before drilling to ensure that the screws are evenly spaced. Secure each corner with 3 screws.

Applying sealant

• It is recommended to apply a bitumen emulsion sealant to the inside of the rectangular metal plant stand to prevent moisture erosion and protect the planter material.
• Corten steel planters are durable, easy to maintain and environmentally friendly, and can add unique charm to your garden. What are you waiting for? Contact us today for a quote and start your garden renewal journey!