Best Large Metal Window Boxes for Flowers, Herbs, and Outdoor Spaces
Large metal window boxes add planting space to windows, railings, fences, and patios. For a long 36-inch option, consider the Jasdego railing planter or Arcadia hanging basket; the Jasdego includes adjustable brackets, while Arcadia includes a coconut liner. For multiple smaller planters, LáLáGreen offers a four-pack, and MUYEZHIYU pairs two 24-inch frames with coco liners. VOXOR is a three-pack option with adjustable brackets.
| Product | Size and Set | Standout Feature |
|---|---|---|
| Jasdego | 36 inches, 2 pack | Adjustable railing brackets |
| Arcadia Garden Products | 36 inches | Included coconut liner |
| LáLáGreen Metal Window Boxes | 24 inches, 4 pack | Flexible mounting options |
| MUYEZHIYU | 24 inches, 2 pack | Coco liners included |
| VOXOR | 24 inches, 3 pack | Adjustable brackets and liners |
Jasdego 36-Inch Adjustable Railing Planters

This two-pack is best for shoppers who want long metal planters with adjustable railing brackets. The powder-coated finish is intended to resist rust and corrosion, and the metal construction is described as sturdier than plastic alternatives. Adjustable brackets provide a convenient way to fit the boxes to different railings.
Choose this set if mounting flexibility and a pair of 36-inch boxes are priorities. The product information recommends railing at least two inches wide because the planter, soil, and plants can create considerable weight. Check the railing’s capacity and fit before hanging; the boxes may not be appropriate for narrower rails.
Arcadia 36-Inch Metal Hanging Basket

Arcadia’s metal trough is best for buyers who want a long hanging planter with its liner included. Its frame has a powder-coated finish, and the natural coconut-fiber liner is described as retaining moisture while allowing drainage and airflow. Those liner properties make it a practical choice for flowers and other plants that need a breathable planting container.
Choose this option if a ready-to-line basket is more useful than adjustable mounting brackets. The listed details do not specify adjustable hardware or a bracket system, so confirm how it will attach to your intended location before buying. The coconut liner also means this is not a solid metal planting trough.
LáLáGreen 24-Inch Metal Planters, Four-Pack

This four-pack is best for buyers who need several 24-inch planters for a coordinated display or multiple growing spots. The black metal baskets have a powder-coated finish and include coco coir liners. The seller describes them as lightweight and suitable for live or artificial plants, including herbs, vegetables, and strawberries.
The boxes are designed for flexible use on walls, windows, fences, and railings, but they do not include brackets. Buyers need to supply an appropriate mounting method, such as screws, hooks, ties, or other household accessories. Choose this set if you want multiple baskets and can handle the installation yourself; avoid it if included mounting brackets are essential.
MUYEZHIYU 24-Inch Planters With Coco Liners

This two-pack is best for shoppers who want a decorative metal frame and natural liners in one set. Each planter measures 24 inches long, 7 inches wide, and 5 inches high. The thick, black-coated metal frame has a floral scroll design, while the coco liner is described as supporting drainage and airflow.
Choose MUYEZHIYU if the included liners and ornamental frame suit your planting area. The available product details do not specify adjustable mounting brackets, so check the product listing and plan your support method before purchasing. Its 24-inch length is also shorter than the 36-inch choices for buyers seeking maximum continuous planting space.
VOXOR 24-Inch Adjustable Planters, Three-Pack

VOXOR is best for buyers who want several railing planters with adjustable brackets and coco liners. The three-pack has a half-round profile intended to sit under windows, along walls, or over railings. Its powder-coated metal frame is designed for outdoor use, and the brackets are described as fitting rails and fences up to 6.5 inches wide.
Choose this set when bracket adjustability and a curved shape matter more than a full-length 36-inch box. Confirm the rail width is within the stated limit before installation. The listed dimensions are 24 inches, so it may be less suitable than a 36-inch model when you need one uninterrupted planting row.
Buying Guide: How To Choose Large Metal Window Boxes
What length and quantity do you need?
Measure the available window, railing, or wall space before choosing a planter. A 36-inch box creates a longer planting area, while 24-inch boxes can be easier to arrange across separate locations. Compare set counts as well: a two-pack, three-pack, or four-pack can change how many mounting points and plants you can accommodate.
Will the planter mount to your location?
Check whether brackets are included and whether they fit your rail. Jasdego and VOXOR list adjustable brackets; the LáLáGreen four-pack does not include brackets and requires a separately selected mounting method. For wall mounting, verify that the intended fasteners and surface can support the planter after it is filled.
Does it include a liner?
Coco coir liners are included with Arcadia, MUYEZHIYU, and the listed LáLáGreen and VOXOR options. Coconut fiber is breathable and allows drainage, according to the product details. A liner also separates the planting medium from the open metal basket. Check the listing to confirm what is included with the exact set you select.
How should you compare outdoor durability?
Look for product-specific construction details rather than assuming all metal finishes perform the same. Several options describe powder-coated metal, which is intended to help resist rust or corrosion. Also consider the weight of the filled planter and the strength of the railing or wall. Metal construction alone does not confirm that every mounting surface is suitable.
Frequently Asked Questions
Are metal window boxes suitable for outdoor use?
The products listed here are described for outdoor use, and several feature powder-coated finishes intended to resist rust or corrosion. Follow the product’s care and installation instructions.
Which option includes adjustable brackets?
Jasdego and VOXOR list adjustable brackets. VOXOR specifies rails and fences up to 6.5 inches wide, while Jasdego recommends a railing at least two inches wide.
Do all these planters include coco liners?
No. The listed Arcadia, MUYEZHIYU, LáLáGreen four-pack, and VOXOR products include coconut or coco liners. Check the specific product details for the set you are considering.
Can a metal window box be used without railing brackets?
Some can be mounted in other ways, depending on the product. The LáLáGreen four-pack is described for wall, window, fence, and railing use, but does not include brackets; suitable mounting accessories must be supplied separately.