Modular Corten Steel Planter Boxes – Flatpack Garden Beds (400mm High)

Build a custom NZ-made corten steel raised bed in minutes — modular flatpack panels, long-lasting weathering steel, and fast NZ-wide delivery.

Here’s how the connections work:

• 90° Corners: No brackets are needed when panels are joined at 90°. The panel's edges match naturally to create strong corners.

• Length Extensions (180°): To join two panels in a straight line for a longer length, use the Length Extender Bracket. This provides a seamless and secure 180° connection.

• Outward 90° Corners (270°): To create an outward corner (effectively a 270° join), use the Corner Bracket for strength and stability.

• Bracing : If you are worried about bulging in long extensions, use the bracing of suitable length. 

Why Choose Our Corten Steel Planters?

Transform your outdoor space with a durable, architectural garden bed designed for New Zealand conditions.

• Premium Corten Steel – Forms a protective rust-like patina that prevents corrosion

• Low Maintenance – No painting, sealing, or upkeep required

• Modular Design – Create endless shapes and sizes

• Flatpack Shipping – Easier handling and lower freight costs

• Clean Modern Look – Complements both contemporary and rustic landscapes

Why You’ll Love It

• Flatpack Design – Ships easily, assembles in minutes with supplied hardware

• Modular Sizes – Choose from multiple lengths or create your custom garden layout

• Durable & Low Maintenance – Rusts beautifully, no ongoing care needed

• NZ-Made – Engineered to handle Aotearoa’s rugged outdoor conditions

• Eco-Friendly – 100% recyclable steel, built to last decades

What Our Customers Say

⭐️⭐️⭐️⭐️⭐️
“Super easy to assemble and looks incredible once it starts weathering. Highly recommend.”
— Sarah, Christchurch

⭐️⭐️⭐️⭐️⭐️
“Great quality steel and clever design. We built a large raised garden in under an hour.”
— Mark, Auckland

⭐️⭐️⭐️⭐️⭐️
“Love that it's NZ made. Solid, simple, and looks premium.”
— Jess, Queenstown

Assembly

Assembly is straightforward and designed for DIY installation.

1. Bolt panels together using supplied fixings
2. Leave bolts slightly loose during initial assembly
3. Square up your planter
4. Fully tighten all bolts with supplied spanners.

Important Information

• Steel arrives in raw form and will develop a natural patina over time
• Runoff during early weathering may stain surrounding surfaces
• Place on soil, gravel, or drainage-friendly base

Frequently Asked Questions

Does it arrive already rusted?
No — it arrives as raw steel and develops a protective patina naturally over time.

Does it include a base?
No — the planter is bottomless to allow proper drainage.

What tools do I need?
All required tools are included.

How long will it last?
Corten steel is designed to last for decades outdoors.