COR-TEN® steel planter CUBY

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Product overview Create a functional and architectural outdoor element with the CUBY raised bed in 2 mm corten steel. Precisely folded edges provide clean lines and structural strength. The unit is supplied without a bottom plate and is designed for direct placement on grass, soil or gravel — suitable for private gardens, terraces and landscaping projects. The material develops a natural protective patina over time, offering a warm, textured appearance that integrates with contemporary and classic planting schemes. The CUBY series from byJEMA is Danish design and production, focused on function, form and longevity.

Key benefits

• Danish design and production
• 2 mm corten steel construction
• Delivered without bottom plate for direct placement on soil or grass
• Material develops a protective rust patina that reduces corrosion
• Custom sizes available on request

Specifications (summary)

• Material: 2 mm corten steel
• Design: Folded construction with folded edges for added strength and precise joints
• Production: Manufactured in Denmark at byJEMA’s factory
• Surface: Supplied with a thin oil film; remove with warm soapy water; patina develops naturally
• Bottom plate: Not included — intended for direct placement on soil, grass or gravel
• Assembly: Supplied as a self-assembly kit including bolts, nuts and detailed instructions
• Custom sizes: Available on request

Available lengths / typical retail prices (examples)

• 40 cm - 175 €
• 80 cm - 195 €
• 120 cm - 225 €
• 150 cm - 285 €
• 220 cm - 355 €
• 230 cm - 405 €
• 290 cm - 445 €
• 340 cm - 505 €
• 360 cm - 565 €
• 430 cm - 665 €
• 450 cm - 645 €
• 500 cm - 755 €
• 560 cm - 775 €
• 570 cm - 855 €
• 640 cm - 955 €
• 670 cm - 905 €
• 710 cm - 1.055 €
• 780 cm - 955 €
• 850 cm - 1.245 €
• 890 cm - 1.185 €
• 920 cm - 1.365 €
• 990 cm - 1.465 €
• 1000 cm - 1.315 €

Maintenance Corten steel requires minimal upkeep. After installation rinse lightly with warm soapy water to remove the protective oil film; the rust patina will form naturally over several weeks depending on weather conditions. If faster patination is desired, a light spray of saltwater can accelerate the process. Avoid placing the unit on sensitive paved surfaces without a protective layer to prevent initial runoff staining.

Assembly & delivery Supplied as a self-assembly kit including bolts, nuts and detailed instructions. Delivered without bottom plate; intended for direct placement on grass, soil or gravel. Assembly instructions are provided with the kit.

Inspiration & use A minimalist, architectural planter that structures outdoor spaces and enhances planting displays. The sharp folded edges and warm corten surface pair well with greenery, stone and timber. Use for vegetables, herbs, perennials and ornamental grasses; raised height improves ergonomics and accessibility.

FAQ (selected)

• Can corten steel harm the plants? No — corten steel does not release harmful substances. For additional protection, line the interior with plastic foil or insulation mats.
• Will rust run off onto the surface underneath? Some runoff can occur during initial patination. Place gravel or a bottom plate under the unit to protect paved surfaces.
• How long does corten steel last? In favourable conditions corten steel has a significantly longer service life than ordinary steel — often exceeding 50 years.
• How can I speed up the patination process? Clean the surface with warm water and lightly spray with saltwater; humid conditions accelerate the process.

Technical specifications

• Material: 2 mm corten steel
• Design: Folded construction with folded edges for strength and precise joints
• Production: Manufactured in Denmark at byJEMA’s factory
• Surface treatment: Supplied with thin oil film; remove with warm soapy water; patina develops naturally
• Bottom plate: Not included — placed directly on soil/grass/gravel
• Assembly: Self-assembly kit with bolts, nuts and instructions
• Variants: Multiple lengths available (see product options) with corresponding prices
• Maintenance: Rinse after installation; patina develops naturally; optional saltwater spray to accelerate patination