different sizes of round corten steel planters

Weathering steel containers are captivating gardening enthusiasts and design experts alike with their unique charm and durability.

Advantages 

  • With their ability to withstand harsh weather, these containers are a long-term investment for both residential and commercial landscapes. The Cor-Ten steel (a common trade name for weathering steel) is specifically designed for outdoor use.
  • Unlike traditional materials, weathering steel requires minimal upkeep, allowing you to focus on your gardening rather than constant care. The protective patina eliminates the need for painting or other protective coatings.
  • The industrial aesthetic of these planters complements a variety of architectural styles, enhancing both modern and classic garden designs. The warm, earthy tones of the patina blend beautifully with natural surroundings.

The PLANTERCRAFT planter is a round container made from Corten steel. It has pre-drilled drainage holes. It’s designed to develop a rust patina. It comes in the following sizes: 16″ diameter x 12″ height, 20″x15″, 24″x18″, 30″x16″, 36″x18″, 42″x16″, and 48″x18″. It’s manufactured in the USA. It has a 4.6 out of 5 star rating from customer reviews

planter drainage
different sizes of round corten steel planters
3 corten steel planters
New round corten steel planter

Right now the price is $370.00 for a solid 12″X12 size Planter Box,

You can check latest prices and order on Amazon here

The Round Shape

selecting a round form  offers several advantages:

  • The soft, curved lines of a round planter provide a visual counterpoint to the often angular lines of architecture and hardscaping. They introduce a sense of fluidity and organic form into the garden.
  • Round planters can often be tucked into corners or placed along curved pathways more easily than rectangular ones. Their shape allows for creative placement in a variety of settings.
  • he round shape can be particularly beneficial for plants with spreading root systems, allowing them to grow outwards in all directions without being restricted by corners.

Technical Specifications

SpecificationDetails
Material Thickness3mm (standard), with options for thinner or thicker materials available
WeightTypically ranges from 50 to 200 lbs, depending on size. A 24-inch diameter planter might weigh 60-80 lbs.
Rust ResistanceForms a protective patina that prevents further corrosion.
Drainage FeaturesIncludes pre-drilled holes (typically multiple holes, around 1/2 inch in diameter) for optimal water management.
Available SizesFrom compact (12 inches) to expansive (48 inches and above) in diameter.
DepthVaries, commonly 12-36 inches, consider plant needs
  

The Weathering Process

Weathering steel undergoes a mesmerizing natural process called patina formation. In just a matter of weeks, this steel planter begins its transformation, gradually evolving over months or even years.

The patina evolves from a vibrant orange-brown to a rich, enduring brown or even a striking purplish hue.

Rust Runoff

During the initial weathering, expect some rust runoff—it’s normal and fades as the patina sets. To prevent stains on nearby surfaces:

  • Place the planter on a gravel bed or other permeable surface that allows for drainage and prevents runoff from pooling.
  • Use a shallow tray or saucer beneath the planter to collect any runoff.
  • Apply a sealant to the surrounding surface (e.g., patio stones) to prevent staining.
  • Select plants that will cascade over the edges of the planter, minimizing direct contact between runoff and the surrounding surface.

 Expert tips

  • Ensure proper drainage to prevent water accumulation, which can lead to root rot. Check that the drainage holes are clear and unobstructed.
  • Choose a size that complements your planting needs and available space. Consider the mature size of the plants you intend to use.
  • Consider the planter’s placement; the patina will develop differently based on exposure to sunlight and moisture.
  • Regularly check for any signs of wear or damage, especially in extreme weather conditions. Although weathering steel is highly durable, it’s still wise to inspect it periodically.

Pros and Cons 

ProsCons
Highly durable and long-lastingInitial cost can be higher than other materials
Unique aesthetic that enhances garden designWeight may make them difficult to move
Low maintenance requirementsRust may stain surrounding surfaces if not managed
Eco-friendly and recyclable materialPatina development can vary based on environmental conditions
Effective drainage optionsMay require protective measures for sensitive plants (due to metal)

Considerations Before Purchasing

Before investing in weathering steel planters, keep these important factors in mind:

  • Consider your local climate and how it may affect the patina development and durability of the planter. Areas with high humidity or salt air may experience faster weathering.
  • Choose plants that thrive in the specific conditions provided by weathering steel containers. Consider factors such as drainage, soil pH, and potential heat absorption by the metal.
  • Ensure the planter size fits your space and that it is placed in a location that complements your garden design. Consider the weight of the planter when filled with soil and plants, especially if you plan to place it on a deck or balcony.While low maintenance, periodic checks for rust and drainage efficiency are recommended. Cleaning the planter with a mild soap and water solution can help maintain its appearance.
  • Evaluate your budget, as these planters can be a more significant investment compared to traditional materials. Prices can range from approximately $200 to $1000 or more, depending on size, shape, and manufacturer. 
  • Many sellers will give at least a one-year warranty on their products.
BeeJay
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