Corten Steel Round Planter – 42" to 48" DIA - 42" Dia. X 12 High / With Drainage Holes is backordered and will ship as soon as it is back in stock.
Add drama and a unique focal point to any outdoor space with our 42-48 inch round planter made from Corten Steel. Ideal for large outdoor spaces like courtyards, city streets, parks, patios, quads, town squares, athletic complexes, and so much more, these weathering-steel round planters come in 42” or 48” diameter and heights ranging from 12” to 48”.
You may also wish to use these 42-48 inch round planters to enhance a large indoor space like a hotel lobby, a gathering space in a place of worship, convention center, shopping mall, or to welcome visitors as they move through any type of grand entrance. If you intend to use one or more of these planters as part of an indoor design, be sure to select the “without drainage holes” option.
How you tailor your space to be uniquely yours or perfectly convey your corporate brand’s values with these 42-48 inch round planters is entirely up to you. Watch the unique surface patina develop over time as your planter oxidizes to a gorgeous rust-colored finish when exposed to the elements. It will serve as a focal point, a conversation piece, and a foundational aspect of your design for years to come.
- ✓ Ready to Use: Arrives fully assembled with seamless, hand-welded corners.
- ✓ American Craftsmanship: Proudly manufactured in the USA from heavy-gauge Corten weathering steel.
- ✓ Living Finish: Ships raw (grey) and develops a beautiful, self-protecting rust patina over time.
- ✓ Smart Design: Features a one-inch raised base for optimal drainage and a sleek floating look.
- ✓ Fast Lead Time: Custom-built and shipped within 3 to 4 weeks.
- ✓ Download product schematics and drawings here.
| Size | Thickness | Weight |
|---|---|---|
| 42" Dia. X 12 High | 1/8" Corten Steel | 106 |
| 42" Dia. X 18 High | 1/8" Corten Steel | 133 |
| 42" Dia. X 24 High | 1/8" Corten Steel | 161 |
| 42" Dia. X 30 High | 1/8" Corten Steel | 189 |
| 42" Dia. X 36 High | 1/8" Corten Steel | 217 |
| 42" Dia. X 42 High | 1/8" Corten Steel | 245 |
| 48" Dia. X 12 High | 1/8" Corten Steel | 129 |
| 48" Dia. X 18 High | 1/8" Corten Steel | 161 |
| 48" Dia. X 24 High | 1/8" Corten Steel | 193 |
| 48" Dia. X 30 High | 1/8" Corten Steel | 225 |
| 48" Dia. X 36 High | 1/8" Corten Steel | 257 |
| 48" Dia. X 42 High | 1/8" Corten Steel | 288 |
| 48" Dia. X 48 High | 1/8" Corten Steel | 320 |
Since all our planters are made to order, only some can be returned up to 30 days from delivery. Please see the list below of the sizes eligible for return. Please view our full return policy.
Weathering steel that forms a natural rust-like patina over time, protecting the material from further corrosion.
Typically 4-10 months, depending on weather exposure.
Yes, using a vinegar, salt, and water solution can help speed up patination.
Yes, rust runoff WILL stain concrete, wood, and tile surfaces. We recommend placing planters in areas where staining won’t be an issue or using a catch basin.
Yes, Corten steel is highly durable and designed to withstand diverse climates. However, areas with constant moisture may prolong the patina process.
Minimal maintenance is needed. Allow the patina to develop naturally without sealing or painting.
Not recommended. Even when sealed, Corten steel WILL bleed and stain indoor surfaces due to rust runoff.
Yes, once the patina is fully formed, they are non-toxic and safe for plants. Initial rusting may release iron into the soil but is generally harmless.
Painting or sealing is not recommended as it prevents the natural patina process.
With proper care, Corten steel planters can last for decades, thanks to the protective rust layer that prevents deep corrosion.
Let’s Answer Your Questions
What are Corten steel planters?
Corten steel planters are made from a weathering steel alloy that forms a natural rust-like patina over time, protecting them from further corrosion.
How long does it take for Corten steel to develop its patina?
It takes around 4-10 months to fully develop a protective rust layer, depending on weather exposure.
Can I accelerate the patina process?
Yes! Spraying the surface with a vinegar, salt and hydrogen Peroxide can speed up rust formation. See instructions here
Do Corten steel planters stain the ground?
Yes, initial rust runoff can stain concrete, wood, or tiles during the first 6 months of weathering. We recommend placing planters on gravel or using protective barriers.
Are Corten steel planters suitable for all weather conditions?
Yes, Corten steel is highly durable in all climates, but excessive moisture or humid conditions can slow down the patina formation.
Do Corten steel planters require maintenance?
Very little! Unlike painted metal, Corten steel does not require sealing or repainting. Simply let nature take its course.
Can I use Corten steel planters indoors?
While possible, it's not recommended for indoor use unless they are sealed, as rust runoff may stain floors.
Are Corten steel planters safe for plants?
Yes, once fully patinated, they are completely non-toxic and safe for plants. However, the initial rusting process can release iron into the soil.
Can Corten steel be painted?
It’s possible but not recommended. Painting over the steel removes its ability to naturally weather and form a protective patina.
How long do Corten steel planters last?
With proper use, they can last decades. The protective rust layer prevents deep corrosion, ensuring longevity.
What Our Customers Say
"Plantercraft is pleasure to work with, quick turnaround and the quality is unparalleled. Highly recommended!P.S. worked with Paul, he’s great! Responds within minutes and took care of our needs very quickly."
"Very happy with Plantercraft corten steel custom made planters. Great customer service, very responsive. custom planters made in only a week of time, delivered across the country, had no issues. Looks stunning!"
"Plantercraft is a great company and an excellent resource of solutions for the landscape design industry and for any homeowner or business. An architect's delight. They will work with you to achieve best results time after time. As a landscape designer I feel confident to incorporate their products in many ways because they are modern, rustic, solid and they are built to last."
"I worked with Paul on custom planters for our pool. We had a smaller space so the dimensions needed to fit the area. In an age when you can barely talk to another human for customer service, Paul was a breath of fresh air. He was responsive, attentive and provided excellent customer service. The price was right and the product arrive well packaged. I couldn't be happier with the planters! Highly recommend A++++"
"Unbelievable service you wont find anywhere else! And of course im super excited of the product I bought here! Great quality.... try it!"
The rusting process of corten steel
Corten steel, also known as weathering steel, is a specially developed type of steel that forms a protective rust layer. This means you receive a product that has not yet rusted. The rusting process begins due to the steel’s unique composition, in which elements such as phosphorus, copper, chromium, and nickel are added to iron. When Corten steel is exposed to the elements, it begins to rust through oxidation, just like regular steel. During this process, the iron particles react with oxygen and moisture in the air, leading to the formation of iron oxide, or rust.
The distinctive feature of Corten steel is the development of a dense and relatively thick rust layer that slows further oxidation. This passivation layer acts as a protective barrier, making it more difficult for oxygen and moisture to penetrate the material. Moreover, Corten steel has a self-healing ability: if the rust layer is damaged, it repairs itself through continued oxidation, forming a new protective layer. This self-healing property contributes to the durability of the material.
The final rust layer gives Corten steel a unique, weathered appearance that is often appreciated in architecture and art, making it a perfect fit for your garden. At the same time, this protective layer extends the life of the steel by shielding it from further corrosion. The rusting process can take several months to years, depending on environmental factors such as humidity and exposure to rain.
Tips for setting
- Placement & Weathering: Choose your spot carefully! Corten steel produces rust runoff as it develops its beautiful patina, which can stain surfaces below. By default, your planter features built-in 1-inch feet, providing essential breathing room and preventing moisture trapping at the base.
- Drainage: Start by adding a layer of pebbles about 4 inches high at the bottom.
- Protection: Place a moisture-permeable anti-root cloth directly over the pebbles.
- Planting: Fill the rest with the appropriate soil for your plants, making sure not to tamp or pack the soil down too tightly.
