Gnee manufactures custom Corten Steel Raised Garden Beds and Corten Steel Planters for residential landscaping, public parks, commercial plazas, hotel entrances, and architectural projects.
Our product range includes rectangular raised garden beds, square corten steel planters, round corten steel planters, modular planting systems, and custom corten steel rings. These products can be fabricated in different dimensions, plate thicknesses, and structural configurations according to customer drawings.
As a weathering steel fabrication supplier, Gnee provides steel material sourcing, CNC cutting, bending, rolling, welding, pre-rusting, surface finishing, assembly, and export services.
Custom Corten Steel Raised Garden Beds for Outdoor Landscaping
Corten Steel Raised Garden Beds are elevated planting structures fabricated from weathering steel plates. They are commonly used for flower gardens, vegetable growing areas, courtyard landscaping, and commercial outdoor planting projects.
Unlike closed-bottom planter boxes, raised garden beds are generally designed with open bottoms, allowing plant roots to extend into the underlying soil when site conditions permit.
Gnee can manufacture rectangular, square, L-shaped, and modular raised garden beds with reinforced top edges, welded corners, connecting plates, and customized installation components.



Corten Steel Raised Garden Beds Specifications
|
Parameter |
Customization |
|---|---|
|
Product |
Corten Steel Raised Garden Bed |
|
Steel Grade |
SPA-H, ASTM A588, S355J0WP, Q355NH |
|
Plate Thickness |
1.5 / 2 / 3 / 4 / 5 / 6 mm |
|
Length |
1000 / 1500 / 2000 / 3000 mm |
|
Width |
500 / 600 / 800 / 1000 mm |
|
Height |
200 / 300 / 400 / 600 mm |
|
Structure |
Open Bottom |
|
Top Edge |
Folded, Rolled, Reinforced |
|
Connection |
Welding, Bolts, Modular Connection |
|
Surface |
Natural Rust, Pre-rusted, Sealed |
The steel thickness and reinforcement design should be selected according to bed height, soil depth, length, and planting load. For long raised beds, reinforced top rims, connecting supports, or internal tie bars may be necessary to limit outward deformation.
Large Custom Corten Steel Planters in Square, Round and Rectangular Shapes



Large Custom Corten Steel Planters are fabricated metal planting containers designed for commercial landscaping, entrances, rooftop gardens, and residential outdoor spaces.
Gnee supplies custom corten steel planters in square, rectangular, round, tapered, and other fabricated shapes. Rusted steel planter boxes can include closed or raised bottoms, drainage outlets, removable liners, reinforced top rims, and mounting supports.
Square corten steel planters are suitable for symmetrical landscape arrangements, while round corten steel planters and custom corten steel rings are often selected for tree planting and circular garden designs.
Square Corten Steel Planters - Dimensions and Unit Weight
|
Size / 尺寸(mm) |
Target Unit Weight |
Quantity |
Target Total |
|---|---|---|---|
|
400 × 400 × 400 |
15 kg |
36 |
540 kg |
|
500 × 500 × 500 |
23 kg |
36 |
828 kg |
|
600 × 600 × 600 |
33 kg |
36 |
1,188 kg |
|
500 × 500 × 1000 |
38 kg |
24 |
912 kg |
The above dimensions and weights are based on a customer's purchasing specifications. They are provided as a reference for custom planter manufacturing, not as verified finished-product weights.
Gnee can evaluate material thickness, welded construction, internal reinforcement, and drainage details to meet project-specific requirements.
Rectangular Corten Steel Planters - Large Format Specifications
|
Size(mm) |
Target Unit Weight |
Quantity |
Target Total |
|---|---|---|---|
|
1000 × 500 × 500 |
35 kg |
24 |
840 kg |
|
1500 × 500 × 500 |
48 kg |
24 |
1,152 kg |
|
2000 × 500 × 500 |
60 kg |
8 |
480 kg |
Long rectangular planters require consideration of sidewall stiffness, bottom support, and soil pressure. For large units, Gnee can review reinforcement options and sectional fabrication methods before production.
Round Corten Steel Planters and Corten Steel Rings
Round corten steel planters can be manufactured through plate rolling and welding. Customers can customize the upper diameter, lower diameter, height, wall thickness, and bottom structure.
Corten steel rings can also be manufactured as open-bottom circular planting borders for landscape applications.
Need matching square and round planters for one project? Send Gnee your drawings, required dimensions, target unit weights, and quantities for a combined fabrication quotation.
Corten Steel Garden Beds and Planters - Material Grades and Steel Thickness
Gnee can source different weathering steel grades for custom raised garden beds, rusted metal planters, and weathered steel planters. Material selection should consider plate thickness, forming requirements, outdoor exposure, and project specifications.
|
Steel Grade |
Standard |
Material Type |
|---|---|---|
|
SPA-H |
JIS G3125 |
Hot-rolled weathering steel |
|
Corten A / A242 Type 1 |
ASTM A242/A242M |
Atmospheric corrosion-resistant steel |
|
ASTM A588 Grade A |
ASTM A588/A588M |
High-strength low-alloy weathering steel |
|
S355J0WP |
EN 10025-5 |
Weathering structural steel |
|
Q355NH |
GB/T 4171 |
Atmospheric corrosion-resistant structural steel |
Custom Fabrication of Corten Steel Raised Garden Beds and Planters
Gnee provides steel fabrication services for custom corten steel raised garden beds and planter boxes. Production processes include steel plate cutting, punching, CNC bending, rolling, welding, edge grinding, reinforcement, surface treatment, and assembly.
The fabrication process is selected according to product shape, plate thickness, dimensions, required surface finish, and installation design.



Steel Fabrication Equipment and Processing Capacity
|
Equipment |
Working Capacity |
Application |
|---|---|---|
|
CNC Laser Cutting |
Max. 2000 × 6000 mm; thickness up to 6 mm |
Planter panels and garden bed walls |
|
CNC Punching |
Max. 1500 × 4000 mm; thickness up to 3 mm |
Drainage holes and decorative patterns |
|
Hole Processing |
Common diameter 3–50 mm |
Drainage and fixing holes |
|
CNC Bending |
Max. bending length 6000 mm |
Folded rims, sides, edging |
|
Laser Cutting Accuracy |
Target ±0.2 mm, subject to material and geometry |
Cut panel dimensions |
|
Welding |
According to approved fabrication drawings |
Corners, frames, stiffeners |
|
Rolling |
Diameter and thickness subject to machine review |
Round planters and steel rings |




Fabrication Requirements for Raised Garden Beds
For corten steel raised garden beds, Gnee can manufacture folded upper edges, reinforced corners, modular connecting plates, ground fixing components, and multiple wall sections.
Bolt-connected or sectional structures can be evaluated for large landscaping orders to simplify transportation and on-site assembly.
Fabrication Requirements for Corten Steel Planters
For custom corten steel planters, processing focuses on wall forming, welded corners, reinforced rims, base plates, drainage systems, and surface finish.
Round and tapered planters may require plate rolling or multi-panel welding, while square and rectangular planter boxes are generally manufactured using cutting, bending, and welding processes.
Drainage and Reinforcement for Corten Steel Planters and Raised Beds
Drainage and reinforcement requirements differ between raised garden beds and planter boxes. Open-bottom raised garden beds generally allow water to drain into the underlying ground, while closed-bottom corten steel planters require dedicated drainage outlets. Both products may require reinforcement to resist soil pressure and deformation.
For continuously wet conditions, internal liners or protective separation systems can be considered to reduce direct contact between moisture-retaining soil and the steel surface.
|
Design Detail |
Raised Garden Beds |
Planters |
|---|---|---|
|
Bottom |
Open bottom |
Open or closed |
|
Drainage |
Through suitable ground |
Designed outlets |
|
Top Rim |
Folded or reinforced |
Folded or welded frame |
|
Reinforcement |
Tie rods or supports |
Stiffeners or inner frames |
|
Installation |
Ground-connected |
Freestanding or anchored |
|
Optional Liner |
According to soil and design |
Internal soil separation |
Bulk Supply of Custom Corten Steel Planters and Raised Garden Beds
Gnee supports bulk procurement of custom corten steel planters and raised garden beds for landscaping contractors, garden product distributors, construction companies, and commercial developers.
A single order can include square corten steel planters, rectangular planting boxes, round corten steel planters, raised garden beds, and landscape edging components.
Customers can submit multiple product sizes and target unit weights for manufacturing assessment and consolidated shipment planning.
Quality Inspection and Export Services
|
Service |
Gnee Supply Scope |
|---|---|
|
Material Selection |
Material grade and thickness review |
|
Custom Fabrication |
Cutting, bending, rolling, welding |
|
Surface Treatment |
Natural, pre-rusted, optional sealing |
|
Dimensional Inspection |
Size and tolerance checks |
|
Material Documentation |
EN 10204 3.1 when applicable and specified |
|
Packaging |
Pallets, wooden cases, protective packing |
|
Shipping |
FOB, CIF, DDP subject to destination |
For full-container orders, Gnee can assess the loading arrangement according to finished dimensions, packaging volume, gross weight, and destination requirements. A 40-foot container loading plan must be confirmed rather than estimated from product weight alone.
Looking for a supplier of Corten Steel Raised Garden Beds, custom corten steel planters, or rusted metal planter boxes for your next landscaping project?
Gnee provides one-stop weathering steel fabrication services covering material sourcing, custom manufacturing, welding, pre-rusting, quality inspection, export packaging, customs clearance, and international freight coordination.
To receive a project quotation, please send us your drawings or specifications, including product type, dimensions, plate thickness, steel grade, quantity, target unit weight, surface treatment, bottom structure, and destination port.
Send Your Drawings to Gnee for a Custom Fabrication Quote.







