3mm Corten Steel Planters

The 3mm Corten Steel Planters are designed for outdoor spaces that need strength, structure, and a natural architectural finish. Made from 3mm weathering steel, these planters develop a warm rust-like patina over time, creating a distinctive surface that suits gardens, patios, courtyards, terraces, commercial entrances, and landscaped outdoor areas.

This product is currently available from £500.00 excluding VAT and £600.00 including VAT. Listed size options include 450mm, 500mm, 600mm, and 750mm heights, with 500mm and 1000mm width options depending on the selected variant. The product page also includes a RAL Colour option, so buyers should confirm the required finish or any colour-related requirement before ordering.

For wider project planning, these planters can be viewed alongside the full Metal Planters range, including 3mm PPC Mild Steel Planters and 4mm PPC Aluminium Planters, where alternative finishes or materials may be more suitable for the project.

Key Benefits

• Made from 3mm Corten weathering steel for a strong and durable planter structure.

• Develops a natural rust-like patina that gives each planter a distinctive outdoor character.

• Suitable for gardens, patios, courtyards, terraces, commercial landscapes, and entrance areas.

• Available in multiple size options to suit compact spaces, borders, feature planting, and larger landscape layouts.

• Welded corners help create a clean, finished appearance for modern and traditional settings.

• Optional drainage holes support healthier planting by helping reduce the risk of waterlogging.

• Works well with timber, stone, concrete, paving, brickwork, and aluminium architectural products.

Product Details and Specification

These product details are based on the current Online Metal Store Ltd product page, which lists the price, available sizes, 3mm Corten material, optional drainage holes, and custom-fabricated item notice.

Where This Product Is Commonly Used

These 3mm Corten steel planters are suitable for private gardens, patios, terraces, roof gardens, courtyards, office entrances, hospitality spaces, schools, commercial landscapes, public areas, and modern outdoor seating zones. They work particularly well where the planter is not just a container, but part of the visual structure of the space.

For larger projects, Corten steel planters can help define walkways, frame entrances, create soft boundaries, separate outdoor areas, or add planting to paved spaces. Online Metal Store Ltd’s Metal Planters page highlights the use of metal planters for patios, balconies, gardens, rooftops, commercial landscaping, and private outdoor spaces.

Why Corten Steel Is a Good Choice

Corten steel, also known as weathering steel, is valued for its natural patina and strong outdoor character. Instead of needing a painted finish, the surface develops a rust-like layer as it weathers. In suitable environments, this patina becomes part of the material’s protective behaviour.

SteelConstruction.info explains that weathering steel can form an adherent protective rust patina in suitable environments, helping inhibit further corrosion. This is one of the reasons weathering steel is widely used in external architecture, bridges, sculptures, and landscape design. Read more about weathering steel.

For planters, this makes Corten steel a practical choice where the buyer wants a long-lasting, low-maintenance material with a natural aged appearance. The warm colour also pairs well with green planting, gravel, timber, brick, concrete, and contemporary paving.

Finish and Weathering Notes

The main appeal of Corten steel is its natural weathered finish. The colour normally starts darker or more raw and then develops into a richer orange-brown patina as it is exposed to outdoor conditions. The final appearance can vary depending on rain exposure, air circulation, location, handling, and the surrounding environment.

Buyers should remember that weathering steel can release rust-coloured run-off during the early weathering stage. For this reason, it is sensible to consider where the planter will be placed, especially near pale paving, porous stone, rendered walls, timber decking, or surfaces that may stain. If the planter will sit on a sensitive surface, confirm suitable preparation and positioning before ordering.

The product page includes a RAL Colour option. Because Corten steel is normally chosen for its natural weathering finish, any colour or finish requirement should be checked with Online Metal Store Ltd before placing the order.

Drainage and Planting Notes

The product page states that optional drainage holes are included to promote plant health. Drainage is important because many plants do not perform well if their roots sit in waterlogged compost for long periods.

The Royal Horticultural Society notes that drainage holes are essential in the base of containers and that container plants need regular watering during spring and summer. Read the RHS container growing guide.

Before ordering, confirm whether you need drainage holes, how the planter will be lined, what type of compost or growing medium will be used, and whether the planter will be placed directly onto paving, decking, gravel, or a raised surface.

Installation and Ordering Notes

Before placing an order, check the required height, width, and length carefully. The listed size options include both 500mm wide and 1000mm wide variants, with different height options available. Since this is a custom-fabricated product, Online Metal Store Ltd advises buyers to double-check measurements before ordering and states that the item is non-returnable unless faulty.

It is also worth checking the planter’s intended location, access route, finished weight when filled, drainage position, ground surface, planting type, and whether any lining or internal protection is needed. Large planters can become very heavy once filled with soil, plants, and water, so the base area should be suitable for the expected load.

If you are planning a full outdoor scheme, you may also want to view Metal Planters, Aluminium Copings, Fascia and Soffits, and Door Canopy and Window products for a more coordinated architectural exterior.

Why Buy From Online Metal Store Ltd

Online Metal Store Ltd supplies metal planters and architectural metal products for UK homeowners, builders, contractors, landscapers, and commercial project teams. Their Metal Planters page states that the range includes aluminium, Corten steel, and powder-coated steel planters for private gardens and commercial landscaping.

The company’s About Us page states that Online Metal Store Ltd serves homeowners, installers, builders, and construction professionals across the United Kingdom, with products supplied from its Chelmsford facility and trusted fabrication partners. It also highlights support with product dimensions, RAL colour selection, installation preparation, and custom fabrication where needed.

For this product, buyers benefit from a custom-fabricated 3mm Corten steel planter available in practical size options for garden, patio, and commercial landscape use. If you are unsure about size, drainage, finish, or site suitability, use the Contact Us page before ordering.

FAQ Section

What are 3mm Corten steel planters used for?

They are used for outdoor planting in gardens, patios, courtyards, terraces, commercial landscapes, entrances, and architectural exterior spaces.

What sizes are available?

The product page lists eight size options, including 450mm, 500mm, 600mm, and 750mm height options, with 500mm and 1000mm width options depending on the selected variant.

What is Corten steel?

Corten steel is a type of weathering steel that develops a rust-like patina when exposed to outdoor conditions. This patina is part of the material’s appearance and can help protect the surface in suitable environments.

Will the planter arrive fully weathered?

Confirm before ordering. Corten steel often continues to weather after installation, and the surface colour can change as it develops outdoors.

Can these planters stain paving?

Corten steel can produce rust-coloured run-off during the weathering process, especially in the early stages. Consider placement carefully around pale paving, stone, render, or porous surfaces.

Do these planters include drainage holes?

The product page states that optional drainage holes are included to promote plant health. Buyers should confirm the drainage requirement before ordering.

Is this product returnable?

The product page states that this is a custom-fabricated item made to the selected size and finish, and it is non-returnable unless faulty.

Choose the correct size for your 3mm Corten steel planter and confirm any drainage, finish, or placement requirements before ordering. If you are unsure which size or specification is right for your garden, patio, terrace, or commercial landscape project, contact Online Metal Store Ltd for guidance before purchase.