Best Planter Boxes For Windows: Compare 10 Options

#1 · Best Overall

1. Mayne Fairfield Window Box

• Dimensions D x W x H: 11"D x 36"W x 10.8"H
• Material: Plastic
• Size: 36in

Best for: Self-watering long window box.

Why it ranks #1: Its 36-inch window-box format combines self-watering, built-in overflow drainage, steel mount brackets, and a stated 3-gallon capacity.

Built-in self-watering technology gives this 36-inch Fairfield box a water reservoir system, helping reduce the need for frequent direct watering. Its double-wall construction, overflow drainage, and included steel mounting brackets make it a substantial window installation for gardeners seeking a permanent, four-season planter.

The 36-inch box measures 11 inches deep and 10.8 inches high, providing a long planting area with a 3-gallon capacity. Self-watering technology and a fill-port plug support a reservoir-based watering routine, while built-in overflow drainage manages excess water. High-grade polyethylene resin is described as lightweight, shock resistant, and suitable for extreme weather, with UV inhibitors for lasting outdoor use. Steel brackets are included for mounting, though the box’s scale calls for a window that can accommodate its length.

Skip it if you have a short sill or want several small pots; Hananojia’s 17-inch boxes are more compact and include trays.

Pick the Fairfield for a long window installation where self-watering and four-season polyethylene construction suit ongoing outdoor planting. Its 36-inch span is the key fit boundary, so measure the available window area before choosing this substantial box.

Listed on Amazon as: Mayne Fairfield 36in Self-Watering Rectangular Window Box Planter, White

#2 · Best Metal Set

2. Karlliu Coco Liner Box

• Dimensions D x W x H: 7"D x 24"W x 5.5"H
• Material: Coco fiber, Metal
• Size: 24 Inch

Best for: Metal railing planter set.

Why it ranks #2: Four 24-inch carbon-steel baskets include coco liners and adjustable brackets, with rust-resistant coating and stated 25-pound capacity.

Four 24-inch carbon-steel baskets arrive with adjustable brackets and coco-fiber liners, letting you create a coordinated planting row along a windowsill, porch, or fence. The powder-coated finish is specified as rust resistant, while the breathable liners help retain water and support plant growth outdoors.

Each basket measures 24 by 7 by 5.5 inches and has a 25-pound capacity, giving you a defined planting space without a deep, bulky profile. Coco-fiber liners combine breathability with water retention, while the drainage system helps excess water escape. Included brackets support hanging installation, and the powder-coated metal frame is described as weather and rust resistant for year-round planting. The four-piece set suits a longer run of railing or several separate outdoor locations.

Skip it if you need lightweight containers for frequent moving; Hananojia’s 17-inch plastic boxes weigh 8 ounces each.

Choose this set for a substantial outdoor planting row on a porch, fence, or windowsill where metal baskets and coco liners fit the look. Each basket is 24 inches wide and weighs part of a 13.5-pound set, so plan for secure mounting.

Listed on Amazon as: 4 Pack 24 Inch Window Boxes Planters for Outdoor Plants Railing Planter Box with Adjustable Brackets for Windowsill Porch Fence Patio Hanging Flower Coco Baskets for Outside Decoration – Black

#3 · Widest Rail Fit

3. VOXOR Railing Planter

• Dimensions D x W x H: 7"D x 24"W x 6.1"H
• Material: Metal
• Size: 24 Inch

Best for: Adjustable railing-fit boxes.

Why it ranks #3: Its adjustable brackets are specified for railings 0 to 6.5 inches wide, and the 24-inch metal box includes a coco liner.

Adjustable brackets fit railings from 0 to 6.5 inches wide, giving this two-piece set a defined installation range for balconies, decks, porches, and patios. Each 24-inch metal planter has a half-round profile and coco liner, combining railing placement with a curved shape suited to outdoor spaces.

The 24-by-7-by-6.1-inch profile fits beneath windows, along walls, or over railings, while the half-round shape is described as maximizing planting space. A 6.1-inch depth provides room for roots, and the coco liner offers a planting surface within the metal frame. Powder-coated metal is listed as rust resistant for outdoor use. Since the adjustable brackets cover railing widths from zero to 6.5 inches, the specified range helps shoppers assess mounting fit before installation.

Skip it if you need a wider railing fit; BTRAM’s 36-inch baskets offer adjustable brackets without a listed width range.

Choose these boxes for outdoor railing or wall planting when the curved profile and coco liner suit the space. The bracket range is explicit—up to 6.5 inches wide—so wider railings fall outside the listed fit.

Listed on Amazon as: Railing Planter Boxes, 24 Inch Window Boxes Planters, Balcony Planters with Adjustable Brackets & Coco Liner for Outdoor Fence, Deck, Porch, and Patio Gardening, 2 Pack

#4 · Best Tray Set

4. Hananojia Window Boxes

• Dimensions D x W x H: 17"D x 7"W x 6.3"H
• Material: Plastic
• Size: 7x17x6.3 in

Best for: Neat windowsill starter set.

Why it ranks #4: Eight 17-inch plastic boxes include attached saucers and two drainage holes, a useful combination for windowsills and smaller planting projects.

Two drainage holes paired with an attached saucer help channel excess water away from the sill, making this eight-piece set a practical option for beginner window planting. Each black plastic box measures 17 by 7 by 6.3 inches and can also serve on a desk, patio, or porch.

The integrated tray and two drainage holes support a simple watering routine: excess water can drain while the saucer helps protect the surface beneath the planter. At 17 inches long, each box fits a compact windowsill or desk planting arrangement, and the eight-piece quantity lets you distribute flowers or plants across several spots. Plastic construction keeps each unit lightweight at 8 ounces, while the listed capacity is 3 pounds per planter.

Skip it if you need long outdoor railing baskets; Karlliu’s 24-inch metal set includes adjustable brackets and coco liners.

This set suits beginners who want multiple compact planters for kitchen windowsills, desks, patios, or porches, with trays to manage drainage. Choose another format if your priority is a metal hanging basket or a deeper load capacity.

Listed on Amazon as: 8pcs Window Box Planter,17 Inches Flower Window Boxes,Rectangle Planters Box with Drainage Holes and Trays, Plastic Vegetable Planters for Windowsill Patio Garden Home Decor Porch Yard (Black)

#5 · Most Drainage Holes

5. Fasmov Window Boxes

• Dimensions D x W x H: 7"D x 17"W x 5.5"H
• Material: Plastic
• Size: 17 in x 7 in x 5.5 in

Best for: Label-ready plastic planter set.

Why it ranks #5: Seven 17-inch plastic planters come with removable trays, six drainage holes per planter, and plant labels for organized planting.

Seven 17-inch plastic boxes arrive with removable trays and seven plant labels, making this set convenient for organizing vegetables, flowers, or other balcony and patio plantings. Six open drainage holes in each planter help water escape, while the lightweight plastic is described as reusable across several seasons.

Each planter measures 17 by 7 inches and stands 5.5 inches high with its tray, a manageable size for a windowsill, balcony, or patio. Six open drainage holes work with the removable tray to channel runoff, while the labels help identify plantings across all seven containers. The product description calls the plastic durable and lightweight, supporting reuse and easier handling. This set is a practical choice for several small growing areas rather than a single long window box.

Skip it if you need a long planter for a wide window; Mayne Fairfield’s 36-inch self-watering box covers a longer span.

This set suits growers organizing several small vegetable or flower plantings across a balcony, patio, or windowsill, with labels and trays for routine care. Its 17-inch length is the main consideration for wider windows or continuous displays.

Listed on Amazon as: Fasmov 7 Pack 17 Inches Flower Window Box Plastic Vegetable Planters with Trays Vegetables Growing Container Garden Flower Plant Pot with 7 Pcs Plant Labels for Balcony, Patio, Garden, Black

#6

6. CHUKEMAOYI Window Boxes

• Dimensions D x W x H: 16.6"D x 7"W x 5.9"H
• Material: Plastic
• Size: 16.6 x 7 x 5.9 in

Best for: Reusable saucer-equipped set.

Why it ranks #6: Seven 16.6-inch plastic planters include saucers and offer a stated 5.9-inch depth for herbs, flowers, and other small plants.

Seven lightweight plastic planters measure 16.6 by 7 by 5.9 inches and include saucers, giving home or office growers a reusable set for herbs, flowers, succulents, and more. The product description says the plastic can withstand sun, rain, and snow without discoloration.

The 16.6-inch length and 5.9-inch depth offer a compact planting footprint, while the listed 708.3-cubic-inch capacity provides room for varied plant projects. Included saucers pair with drainage holes to manage runoff beneath each container. Plastic construction is described as recyclable, lightweight, and sturdy, and the listing says the boxes can be reused for several seasons without chipping or cracking. Seven planters help spread planting across a home or office without requiring one large box.

Skip it if you need longer boxes for a broad window; Tcevily’s planters measure approximately 23.6 inches and can be stacked for storage.

Choose this set for home or office planting across several smaller locations, especially when reusable plastic boxes and saucers suit your routine. The 16.6-inch length is the main fit boundary for wider windows or continuous planting displays.

Listed on Amazon as: CHUKEMAOYI Window Box Planter,7Pack Plastic Vegetable Flower Planters Boxes

#7

7. OSMOFUZE Window Boxes

• Dimensions D x W x H: 16.9"D x 7.5"W x 5.5"H
• Material: Plastic
• Size: 6pcs 17in

Best for: Brick-red tray planters.

Why it ranks #7: This six-pack measures about 17 inches long and includes trays; raised feet and drainage holes support airflow and water drainage.

Six 17-inch rectangular planters come with trays, raised pot feet, and drainage holes, giving indoor or outdoor growers a way to manage airflow and runoff across several plantings. Their 16.9-by-7.5-by-5.5-inch profile suits flowers, vegetables, or strawberries on balconies and other garden spaces.

Raised feet lift the planter base, while drainage holes help water move out and promote airflow around the pot. Each box measures about 17 inches long and has an 11.02-liter capacity, giving plants room within a compact rectangular footprint. The included trays help contain runoff and support tidier balcony use. Plastic construction is described as suitable for multiple seasons, and the six-piece quantity works for gardeners planning several matching containers rather than one long mounted box.

Skip it if you want a single 36-inch self-watering box; Mayne Fairfield offers a longer planter with built-in overflow drainage.

This set fits balcony and indoor gardeners who want several manageable containers with trays for flowers, vegetables, or strawberries. Each planter is about 17 inches long, so it is better for separate planting spots than a single continuous window display.

Listed on Amazon as: Window Box Planter, 6 Pcs 17" Flower Rectangle Planter with Tray, Brick Red

#8

8. Tcevily 24-Inch Planters

• Dimensions D x W x H: 24"D x 6.3"W x 7.5"H
• Material: Plastic, Polypropylene (PP)
• Size: 24 inch

Best for: Stackable large plastic boxes.

Why it ranks #8: The 24-inch plastic boxes have an insert shelf and drainage holes, offering a larger planting format for indoor or outdoor use.

A shelf insert and stackable plastic construction make these 24-inch boxes useful for gardeners who want a large planting area and compact storage between uses. Each planter measures about 23.6 by 7.5 by 6.3 inches, and the surface can be cleaned by wiping or rinsing with water.

The listed 18.6-liter capacity and nearly 24-inch length provide room for seedlings, flowers, succulents, or greening projects, while the insert shelf is included as an organizing feature. When the planters are not in use, their stackable form can save storage space. Plastic and polypropylene construction supports simple wipe-down or water washing, and the substantial size is said to reduce watering frequency. The title and specifications describe a six-piece product, while one feature passage says 12 pieces, so the supplied quantity details conflict.

Skip it if you need a confirmed set count before ordering; OSMOFUZE lists six 17-inch boxes with trays and a consistent stated quantity.

Consider these boxes for larger planting projects where stackable storage and easy surface cleaning matter. The listed dimensions and capacity suit a broad planter, but the product information conflicts on whether the set contains six or 12 pieces.

Listed on Amazon as: 6 Pcs 24 inch Window Box Planter, Large Rectangular Flower Planter Boxes with Shelf Insert Plastic for Indoor and Outdoor Garden, Balcony Home Decor (6, 24 inch)

#9

9. QPEY 17-Inch Planters

• Dimensions D x W x H: 0.65"D x 1"W x 1"H
• Material: Plastic
• Size: 17 in

Best for: Bulk boxes for thirsty plants.

Why it ranks #9: Ten 17-inch plastic boxes provide a multipack option with bottom breathable holes and trays, though the listed dimensions are inconsistent.

A ten-piece set of deep 17-inch plastic boxes offers plenty of containers for repeated planting projects, while bottom breathing holes help air reach roots and limit water accumulation. The listing says the chassis can store water so plants may go five to seven days without watering.

Each planter is described as 17 inches long, with a deep profile intended to provide room for plants and flowers. Bottom ventilation holes support root airflow, and the stored water in the chassis is said to help extend watering intervals to five to seven days. Ten boxes make it possible to organize multiple plantings across a home or outdoor area. The supplied dimensions field is inconsistent with the stated 17-inch size, so use the product’s stated size when considering available space.

Skip it if you need a verified long metal railing basket; VOXOR lists a 24-inch frame with adjustable brackets for railings.

Consider this set for gardeners who need many plastic boxes and value the listed water-storage interval for routine maintenance. The dimensions field conflicts with the stated 17-inch size, so this is a less suitable choice when exact measurements are essential.

Listed on Amazon as: QPEY Window Box Planter, 10PC 17In Black Plastic Flower Box for Outdoor

#10

10. BTRAM 36-Inch Basket

• Dimensions D x W x H: 36.4"D x 7.9"W x 7.3"H
• Material: Metal
• Size: 7.9 x 36.4 x 7.3 in

Best for: Long coco-lined metal baskets.

Why it ranks #10: Four 36-inch metal baskets include coco liners and adjustable brackets, but their basket-and-bracket format is less directly suited to a windowsill.

Four 36-inch metal baskets with natural coconut-fiber liners create a long, coordinated planting run for railings, fences, or walls. Powder-coated frames are listed as rust resistant, and the included adjustable brackets and hardware support hanging installation for flowers, succulents, or small herbs indoors or out.

At 36.4 inches long and 7.9 inches wide, each basket offers an extended planting area for a railing or wall display. The metal frame provides structure, while the coco-fiber liner supplies a natural planting surface; the listing also describes a frame-and-liner combination intended to help avoid mildew and rotting. Adjustable brackets and hardware are included for installation, and four baskets allow a consistent look across multiple sections. The product is metal, so the set is less suited to gardeners seeking lightweight plastic pots.

Skip it if you have only a short sill; Fasmov’s 17-inch plastic boxes come with removable trays and plant labels.

This set suits gardeners who want a long metal-and-coir display across a railing, fence, or wall, with adjustable brackets for hanging. Its 36.4-inch length makes it a better fit for extended runs than short windowsills.

Listed on Amazon as: 4 Pack 36IN Window Box Planter Basket w/Adjustable Brackets (S1)