ADEZZ Corten Steel EXTEND Planter (4 sizes)

CXT

• Available in four sculptural sizes: D120cm × H60cm, D100cm × H75cm, D80cm × H90cm and D70cm × H110cm.
• Designed and manufactured by ADEZZ in the Netherlands to showcase advanced Corten Steel fabrication.
• Features a distinctive stepped, layered profile that creates a dramatic architectural form.
• Fabricated from 3mm Corten Steel, category A S355JOWP for outstanding strength and weather resistance.
• Develops a self-protecting rust patina that prevents deeper corrosion while delivering a warm, natural finish.
• Raised on integrated steel feet to allow airflow beneath the planter and protect the base.
• Supplied with drainage holes as standard to promote healthy root growth and prevent water build-up.
• Designed for architectural gardens, commercial landscapes and high-end outdoor projects.
• Offers a low-maintenance planting solution that requires no painting or coating.
• Backed by a 5-year manufacturer’s warranty.
• UK nationwide delivery available from Riverhill Garden Supplies.

The ADEZZ Corten Steel EXTEND Planter demonstrates ADEZZ's full fabrication capabilities and shows how contemporary Corten Steel planters can go far beyond simple squares and troughs. ADEZZ designs and manufactures the EXTEND in the Netherlands as a sculptural, high-impact planter for architectural landscapes, professional garden design and commercial outdoor spaces.

ADEZZ produces the EXTEND in four striking sizes: D120cm × H60cm, D100cm × H75cm, D80cm × H90cm and D70cm × H110cm. These changing proportions allow you to combine wide, grounded forms with tall vertical silhouettes, creating depth, rhythm and strong visual movement across planting schemes. You can place a single EXTEND as a dramatic focal point or group several together to build a powerful architectural composition.

The EXTEND uses a distinctive stepped, layered profile that gives the planter its name. This design creates the visual effect of one form rising from another, adding drama, structure, and contemporary character to any landscape. Light moves across the surfaces, highlighting the natural tones of the Corten Steel throughout the day.

ADEZZ fabricates every EXTEND from 3mm Corten Steel, category A S355JOWP, a high-grade weather-resistant steel engineered for long-term outdoor use. When you expose the steel to the elements, it forms a self-protecting rust layer that prevents deeper corrosion while delivering the warm, natural patina that landscape designers value.

The EXTEND stands on integrated steel feet that lift the planter off the ground, allowing air to circulate beneath. ADEZZ supplies drainage as standard, allowing excess water to escape freely and supporting healthy root growth.

The ADEZZ EXTEND Planter delivers exceptional strength, low maintenance and long-term durability and includes a 5-year manufacturer’s warranty. Because Corten Steel does not require painting or coating, it performs reliably in all seasons, making it ideal for private gardens, courtyards, hotels, public spaces and large-scale landscape projects.

As the steel weathers, the EXTEND develops its rich rusted surface while maintaining its structural integrity, giving every installation a bold, natural and highly architectural finish.

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

Click here to download the ADEZZ Contemporary Corten Steel Planters Information Sheet

ADEZZ manufactures its Corten Steel planters from a specialist steel alloy that naturally protects itself from corrosion. When you place the planter outdoors, oxygen and moisture react with the steel to form a stable protective rust layer. This layer seals the surface and prevents deeper corrosion, keeping the planter strong and structurally sound for many years.

ADEZZ supplies all Corten Steel planters rust-free. Once you expose the planter to the elements, the weathering process begins and usually takes 4 to 5 months, depending on rainfall, temperature, and exposure. During this time, the colour changes from dark grey to warm orange-brown, then settles into the rich natural patina that designers and landscapers value.

As the steel weathers, rust runoff can temporarily stain paving or stone. You can prevent marking by placing the planter on gravel, soil or another permeable surface until the patina stabilises.

ADEZZ fits every Corten Steel planter with hidden feet and drainage holes. These raise the planter slightly above the ground, allowing air to circulate underneath and water to drain away freely. This design protects the base and supports healthy root growth.

Install the planter on a flat, solid surface and leave at least 1cm of space around the base so moisture cannot become trapped. Do not fit an overflow pipe, as standing water inside the planter can accelerate corrosion.

When you plant, add a 10cm layer of gravel to the base, cover it with a permeable membrane, then add your compost or growing medium. This setup ensures excellent drainage and prevents excess moisture from reaching the steel.

Avoid using hydro pellets, as they retain water and reduce drainage efficiency. For best results, avoid placing Corten Steel planters in areas with heavy salt exposure, such as near the coast.

Once the planter has developed its final patina, you can leave it to weather naturally, or apply a rust stabiliser (Owatrol) to lock in the colour and prevent loose rust from transferring.

With proper installation and drainage, ADEZZ Corten Steel planters deliver a robust, low-maintenance, weatherproof planting solution that performs beautifully year after year.

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

To our knowledge, no UK reseller stocks ADEZZ Corten Steel Planters in bulk. ADEZZ fulfils most orders directly from its central warehouse in Uden, Holland, ensuring consistent lead times across all resellers. While Riverhill Garden Supplies holds a small number of Corten Steel planters for display, ADEZZ supplies the majority of customer orders straight from Holland.

On our website, we list all ADEZZ Corten Steel Planters as “in stock,” with an indicative lead time of 10 days to 2 weeks, which reflects the typical delivery timeframe when ADEZZ holds stock in Holland. It is generally the case; if lead time matters to your project, we recommend contacting us before ordering so we can check live availability for you.

If ADEZZ does not have the planter in stock, they will make it to order, which adds a fabrication lead time of approximately 4 weeks before delivery to the UK.

Storage and Delivery Flexibility

We understand that customers like to plan ahead. An advantage of ordering from Riverhill Garden Supplies is that we can hold stock at our warehouse near Tonbridge, Kent, until you’re ready to take delivery.

We can order products well in advance of your project and store them at no additional cost until you’re ready. This allows us to take full control of delivery from the UK to anywhere in the UK, while giving you complete control over when your products arrive.

In addition, customers are welcome to collect their orders directly from our storage facility near Tonbridge, Kent, where we can load them at short notice using one of our forklift trucks.

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

Riverhill Garden Supplies has been an ADEZZ reseller in the UK since 2011, and is proud to be one of the leading retail suppliers of ADEZZ garden planters nationwide. Our focus is on premium-quality garden products at the best possible prices for both the retail and garden professional, with exceptional customer service to match.

We regularly monitor market prices to ensure our customers receive outstanding value. However, if you find any products available online at a lower price, please let us know — we will match the final basket price for like-for-like items.

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

Riverhill Garden Supplies — ADEZZ Specialist (UK)

In 2011, Riverhill Garden Supplies became the first business in the UK to retail ADEZZ products through the then sole importer, The Pot Company. Since 2019, we have worked directly with ADEZZ to supply their full range to customers across the UK.

More than just an online retailer
We operate as more than just an online retailer. From our Kent warehouse we handle extra-large orders, bespoke fabrications and phased or delayed deliveries. We regularly store planters for customers until sites are ready and then arrange tailored deliveries to suit contractors, designers and private clients. We keep our approach simple by combining flexibility, practical problem-solving and clear communication.

Ordering direct from ADEZZ (Uden, Holland)
As a dedicated ADEZZ partner, Riverhill Garden Supplies combines deep product knowledge, accurate lead time advice and dependable customer service. We place orders directly with ADEZZ’s central warehouse in Uden, Holland, often daily during the high season, which allows us to secure stock immediately or instruct fabrication to begin without delay when ADEZZ needs to make a product to order.

Why we choose ADEZZ
We choose to list ADEZZ products because their European craftsmanship, precision fabrication and durable finishes meet the standards we demand for our customers. ADEZZ designs Aluminium and Corten Steel planters that combine clean contemporary design with professional-grade construction, making them suitable for everything from private gardens to large commercial landscapes.

Why ADEZZ Corten Steel stands apart
Corten Steel planters are one of the most poorly replicated products in the planter industry, with many cheaper alternatives failing to match proper steel grade, welding quality and long-term performance. ADEZZ uses high-grade 3mm Corten Steel (S355JOWP) and applies precision welding, accurate forming and strict quality control. This approach ensures every planter weathers evenly, forms a proper protective patina and remains structurally sound for decades. You can see the difference in the finish, strength and consistency of every ADEZZ Corten Steel planter.

How ADEZZ compares to UK-made alternatives
We regularly speak with UK manufacturers who offer Aluminium, Corten Steel, Fibreglass, Hardwood and coated steel planters that attempt to copy ADEZZ designs. None of them match the welding quality, surface finish or long-term durability that ADEZZ consistently delivers.

ADEZZ also holds an extensive range of stock at its warehouse in Uden, Holland, which allows us to offer fast, reliable order fulfilment across hundreds of sizes, colours and designs — something UK manufacturers simply cannot replicate. Over the years, we have imported planters from further afield. While this sometimes reduced costs, it also confirmed what we already knew: quality suffered. Inferior coatings, thinner steel and inconsistent fabrication produced planters that failed to meet our standards, especially in Corten Steel and Aluminium.

ADEZZ remains our benchmark
These experiences continue to reinforce our view that ADEZZ sets the benchmark for European-made planters. Their craftsmanship, consistency and reliability stand apart across Aluminium, Corten Steel, Hardwood, Fibreglass and coated steel ranges.

Experienced UK ADEZZ reseller
Whether you need modern Aluminium planters, premium Corten Steel designs or bespoke ADEZZ fabrications, Riverhill Garden Supplies provides one of the UK’s most experienced and reliable ADEZZ services, delivering clear advice, accurate lead times and dependable delivery from order to installation.

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

Telephone Sevenoaks (01732) 522471

Planting Ideas for ADEZZ Corten Steel EXTEND Planters

The ADEZZ Corten Steel EXTEND Planter lets you create bold, architectural planting that transforms a space. Its stepped form and varying heights allow you to build layered compositions, making it ideal for gardens, terraces and large landscape schemes that need substantial visual impact.

Use the larger EXTEND sizes, especially D120cm × H60cm and D100cm × H75cm, to plant feature trees and large shrubs. Amelanchier, multi-stem Birch, Acer and Olive trees perform exceptionally well in Corten Steel and add height, structure and seasonal interest while anchoring the design.

For contemporary landscapes, combine EXTEND with architectural plants such as Phormium, Cordyline, Fatsia japonica and upright Bamboo. These bold forms echo the planter's strong geometry and create a clean, modern look.

To introduce movement and softness, plant EXTEND with ornamental grasses including Miscanthus, Pennisetum and Stipa tenuissima. Their fine textures and flowing forms contrast beautifully with the steel's sharp lines, creating a balanced and dynamic planting scheme.

You can soften the stepped edges by adding trailing plants and perennials such as Ivy, Campanula, Heuchera, Gaura and Salvia. These plants spill gently over the edges of the planter, creating a relaxed, layered finish.

For a more natural, wildlife-friendly scheme, plant EXTEND with ferns, foxgloves, heathers and native grasses. These species complement the warm rust tones of Corten Steel and help the planter blend effortlessly into both formal and informal garden settings.

Whether you create a dramatic architectural statement or a softer, natural planting scheme, the ADEZZ Corten Steel EXTEND Planter gives you the scale, structure and warmth to bring your design together.

— Jeremy
Owner, Riverhill Garden Supplies

Order online or by telephone. Our office is open Mon-Sat 8 am-10 pm including Bank Holidays except Christmas Day.

ADEZZ Corten Steel EXTEND Planter (4 sizes).

We will deliver your order using the fastest, safest, and most reliable method possible. Our delivery methods are listed on the product page as well as throughout the checkout process.

Riverhill Garden Supplies will select the appropriate dispatch method when you order based on your location and the product(s) that you have ordered.

Dispatch Methods

Parcel Delivery

Smaller products are delivered by parcel couriers, such as TNT and Parcelforce. Upon dispatch, we will notify you via email with the estimated day of delivery and forward you a tracking number.

Pallet Delivery

Larger products will be delivered by our own dedicated delivery drivers or by specialist carriers such as Palletways and ILS who will be given your contact details and instructed to book in delivery with you once your order reaches your local delivery depot.

Special Instructions

If you have any special instructions regarding delivery, please email mail@riverhillgardensupplies.com or telephone the office on T 01732 522471.

The office is open 7 days a week, from 8am to 10pm including Bank Holidays except Christmas Day.

Shipping Costs

We charge a flat rate of £20.00 for delivery to England, Wales and Central Scotland. We charge a flat rate of £50.00 for delivery to England, Wales and Central Scotland if your order includes any ADEZZ, FORNO or FURNS product.

We are not able to offer a flat rate of £20.00 for delivery to East Central Scotland, North and North East Scotland, West Scotland, Norther Ireland, ROI, Skye, Orkney Isles, Outer Hebrides, Shetland Isles, Inner Hebrides, Isle of White, Isle of Man and the Channel Isles and a surcharge will apply. Please see prices below.

East Central Scotland, West Scotland and North and North East Scotland

£70

Postcodes DD, FK8-9,11-21, KY1,6-16,99, PH1-18, TR1-16, AB, IV1-28,30-32,36,55-56,63,99, KW1-3,5-14, TR17-27,93, PA21-38,80, PH19-26,30-41,49-50

Isle of White

£80

Postcodes PO30-4

Northern Ireland, ROI, Isle of Man

£90

Postcodes BT, IE6, IE1-5,7-26, IM

Skye, Orkney Isles, Outer Hebrides, Shetland Isles, Inner Hebrides

£120

IV40-49,51-54, KW15-17, HS, PA20, ZE, KA27, PA42-49,62-75, KA28, PA41,60-61,76-78, PH42-44

Channel Isles

£250

GY1-9, JE

Europe and the Rest of the World

Riverhill Garden Supplies deliver to Europe and the Rest of the World. Please email mail@riverhillgardensupplies.com or telephone the office on T +44 1732 522471 to discuss delivery to Europe and the Rest of the World.

The office is open 7 days a week, from 8am to 10pm including Bank Holidays except Christmas Day.

You can return your order up to 60 days after delivery

Please note that you are responsible for arranging the return of your order and for the costs of returning your order to us unless we have delivered the item to you in error. All return items must have original tags and packaging; and not been used or modified.

Our returns address

Non-returnable Items

We cannot accept returns on any made-to-order products. This includes all products by ADEZZ and all products in the Fibreglass Collection.

Do you need help arranging a return?

If you are having difficulties arranging a return, please telephone the office on t 01732 522471 to speak to a member of staff who will assist you.

The office is open 7 days a week, from 8am to 10pm including Bank Holidays except Christmas Day.

What if My Order Arrives Damaged?

Our goal is to make buying online with Riverhill Garden Supplies easy, safe and efficient. Although extremely rare items can arrive damaged and we are conscious of this so it is very important for that you read the following.

Upon delivery, please carry out the following steps

• Remove the goods completely from their packaging
• Closely inspect the goods for damages or shortfalls
• Sign for the goods, accordingly, noting damages/shortfalls and refuse the goods
• Notify Riverhill Garden Supplies of any damages/shortfalls within 24 hours by telephoning the office on t 01732 522471. The office is open 7 days a week, from 8am to 10pm including Bank Holidays except Christmas Day. Providing that you have signed for the goods as damaged and refused the goods we will repeat and dispatch your order again or arrange a full refund

The courier is obliged to wait 15 minutes for you to carry out these checks if need be. No claim will be accepted if a clean signature is given. Any claim for damages/shortfall must be made within 24 hours.