sold in last 24 hours
| Shape | Height | Diameter | Base |
|---|---|---|---|
 Semi-Circle
|
400 mm | 400 mm | No |
Make the most of your space with this Semi Circular Rustic Steel Planter. With a 400mm diameter and 400mm height, it offers a balanced size that works well in both small and medium garden areas. At just over 15 inches wide and tall, it is ideal for adding structure without overwhelming your layout.
The Semi Circular design allows the planter to sit flush against walls, fences or straight edges. This makes it perfect for patios, decking or along the base of your home. It helps turn unused areas into neat and attractive planting spaces.
Each planter is made from heavy duty 2mm British steel and is fully welded for strength. It arrives ready to use, so there is no assembly needed. Simply place it where you want it and start planting. The open base allows it to sit directly onto soil or other surfaces, helping with natural drainage and root growth.
Supplied in a bare steel finish, the planter will rust over time. This creates a natural, aged patina that blends well into outdoor spaces and adds character as it develops.
The 400mm height gives enough depth for flowers, herbs or small shrubs, while still being easy to manage and maintain.
What can this planter be used for?
This Semi Circular Planter is ideal for borders, wall features and tidy planting areas.
Use it against walls or fences to create clean lines, or place it around existing plants to build a neat border. It also works well filled with soil, stones or decorative materials.
What is it made from?
The Semi Circular Planter is made from strong 2mm mild steel.
Each unit is fully welded to create a solid and durable structure for outdoor use.
Why choose this planter?
Dimensions
Many of our products are made from what we call Rustic Steel. This is plain mild steel with no paint or coating. It is made to change when left outside. Over time, the steel reacts with air and rain. This creates a warm orange-brown finish, often called a patina. It gives the product a natural, aged look.
When your item arrives, it will look grey. It may also have small marks of light rust. This is normal. It is not a fault. It simply shows that the steel is beginning its natural ageing process. As the product stays outdoors, the rust layer will slowly grow and darken in colour.
How fast this happens depends on the weather. Rain, damp air and cold days will speed it up. Dry weather or a sheltered spot will slow it down. Each item will age in its own way. No two pieces will ever look exactly the same, which adds to their charm.
In normal outdoor conditions, full rusting can take a few weeks or even a few months. If you would like to speed up the process, there is a simple method you can try.
Mix equal parts distilled vinegar and hydrogen peroxide in a spray bottle. Add a quarter of a cup of table salt. Shake well. Spray the mixture evenly over the surface. This will start a fast reaction and you should see rust forming within a couple of days. Always wear gloves and eye protection when handling the mixture, and use it in a well-ventilated area.
Drag the slider to see how the steel changes over time.
If you are more used to working in inches and feet rather than millimetres, this quick guide can help. Below you will find a handy reference for some of our standard planter sizes, along with a simple converter to calculate more specific measurements whenever you need them.
| Millimetres (mm) | Inches (") | Feet + Inches |
|---|---|---|
| 120 | 4.72" | 0ft 4.72in |
| 200 | 7.87" | 0ft 7.87in |
| 300 | 11.81" | 0ft 11.81in |
| 400 | 15.75" | 1ft 3.75in |
| 600 | 23.62" | 1ft 11.62in |
| 900 | 35.43" | 2ft 11.43in |
Tip: 25.4mm = 1 inch.
No, our planters are not made from Corten steel. Corten is actually a specific brand name for a type of weathering steel. Over time the name has become widely used to describe any steel that develops a natural rust finish outdoors, much like how many people use the word “Hoover” to describe a vacuum cleaner.
Our planters are made from high-quality British steel that naturally weathers when exposed to the elements. As the steel sits outdoors, it slowly develops a rich rusted surface that protects the metal and creates the rustic appearance many people look for in garden planters.
This means you still get the same attractive weathered finish and long-lasting durability. The steel gradually forms a warm, natural rust patina that blends beautifully with plants, stone and timber in the garden.
Smaller planters are sent by courier. Larger planters or bulk orders may be delivered on a pallet to keep them safe during transport. Any products that require pallet delivery will be clearly marked on the product page.
No. You will only pay one shipping fee for your order, even if you purchase multiple planters. This makes it easier and more cost effective to buy several planters at once.
Yes, they can be placed on patios, decking or paving. During the early weathering stage, some rust runoff may occur. If you are placing the planter on light coloured surfaces, you may wish to raise it slightly or place it on gravel to reduce the chance of marking.
No special maintenance is required. The steel is designed to weather naturally outdoors. The rusted surface will continue to develop over time and does not need to be treated or painted.
Yes. Weathering steel planters are widely used in gardens and landscaping. Once the surface rust layer forms, the planter provides a stable and long-lasting container for a wide range of plants.
Yes. Steel planters are strong and designed for long-term outdoor use. As the rust layer develops it forms a stable surface that protects the steel underneath. This allows the planter to remain durable while maintaining its natural rustic appearance.
