Best Rectangular Window Boxes of 2025

Toby Butcher Avatar
Toby Butcher
Last Updated: 2 Feb 2025

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Rectangular window boxes are a popular gardening accessory that allows you to add greenery and beauty to your outdoor space. These boxes are typically made of wood or plastic and come in a range of sizes, allowing you to choose the perfect fit for your windowsill or balcony railing. With the right soil, seeds, and care, you can grow herbs, flowers, and even vegetables in these boxes, adding a touch of nature to your home. These versatile window boxes are an excellent choice for anyone looking to add some flair to their outdoor space without taking up too much room.

At a Glance: Our Top Picks

RUDDINGS WOOD Large Metal Window Boxes Cover #TOP 1
RUDDINGS WOOD Large Metal Window Boxes
ftb score rating icon 9.8
KADAX 18 x 56 cm Outdoor Planter Cover #TOP 2
KADAX 18 x 56 cm Outdoor Planter
ftb score rating icon 9.7
LEXININ 6 Pack Black Window Planters Cover #TOP 3
LEXININ 6 Pack Black Window Planters
ftb score rating icon 9.5

Top 10 Rectangular Window Boxes

RUDDINGS WOOD Large Metal Window Boxes

Black
122cm
RUDDINGS WOOD Large Metal Window Boxes Cover
RUDDINGS WOOD Set of 2 x 122cm (48") Large Window Boxes Metal Rectangular Flower Trough Containers - Outdoor Wall Garden Basket Planter Box

The RUDDINGS WOOD Window Boxes are perfect for enhancing your outdoor space. Made from heavy-duty solid steel, these sturdy flower troughs are designed to withstand the elements. Their stylish front twisted bars add an attractive decorative touch, making them ideal for hanging under windows or on garden walls. With two hanging hooks included, you can easily fit them to walls or garden fences. Plus, the black powder coating protects against rust and discolouration, ensuring they remain looking good for years to come.

What We Like
Durable heavy-duty steel construction
Rust-resistant black powder coating
Two hanging hooks included
Stylish decorative design

KADAX 18 x 56 cm Outdoor Planter

K3858
White
Smooth pattern
KADAX 18 x 56 cm Outdoor Planter Cover
KADAX Rectangular Planter 18 x 56 cm, Outdoor Plastic Window Box with Insert for Windowsill, Long Weatherproof Plant Pot for Balcony Railing (White)

The KADAX Outdoor Planter is an excellent choice for enhancing your balcony or windowsill. Its functional design not only complements modern aesthetics but also protects your plants, ensuring they thrive. The clever removable insert improves drainage and aeration, which is crucial for preventing overwatering and promoting healthy root growth. With its weatherproof features, this planter withstands UV rays and frost, maintaining its beauty through various seasons. Made from durable plastic, it resists scratches and deformation, giving you peace of mind for long-lasting use.

What We Like
Stylish modern design
Improves drainage and aeration
Weatherproof and durable
Available in various colours
#TOP 3

LEXININ 6 Pack Black Window Planters

LEXININ
2306117
Black
LEXININ 6 Pack Black Window Planters Cover
LEXININ 6 Pack Plastic Window Boxes Planters, 35 x 17 x 14cm Black Rectangular Window Box with Trays, Windowsill Planter for Garden Balcony

The LEXININ Window Planters are versatile and stylish options for your home. With dimensions of 35 x 17 x 14cm, the ample size allows you to grow multiple plants simultaneously, enhancing your living space. Made from durable resinous material, these planters are designed to withstand outdoor conditions without cracking. The built-in drainage system, featuring holes in the pot and a tray to catch excess water, prevents overwatering, ensuring your plants thrive in a healthy environment. Use them in any setting, from window sills to balconies, to create a touch of nature indoors.

What We Like
Durable and sturdy material
Effective drainage system
Ample size for multiple plants
Versatile for various locations

Pingeui 6 Pack Plastic Window Box Planter

PINGEUI
White
Pingeui 6 Pack Plastic Window Box Planter Cover
PINGEUI 6 Pack 43cm Plastic Window Box Planter, Rectangular Windowsill Planter Countryside Flower Box Planter, Vegetable Growing Containers with Trays and 30 PCS Plant Labels, White

The Pingeui Window Box Planter offers ample space for growing multiple plants simultaneously, making it perfect for succulent enthusiasts. Its high-quality plastic construction ensures durability and ease of maintenance, so you won’t have to worry about rust or heavy lifting. With small drainage holes and raised feet, it promotes healthy plant growth by preventing water accumulation. Additionally, each planter comes with trays to catch excess water and labels to help you keep track of your plants, making gardening more organised and enjoyable.

What We Like
Large capacity for multiple plants
Durable and lightweight material
Effective drainage system
Includes trays and plant labels
#TOP 5

GROWNEER 3 Packs White Flower Boxes

FWP001W-3P-17IN
White
3pcs/17x7.2in
GROWNEER 3 Packs White Flower Boxes Cover
GROWNEER 3 Packs Window Box 43cm White Flower Box Plastic Vegetable Planters with 15 Pcs Plant Labels Rectangular Windowsill Patio Garden Home Decor Porch

The GROWNEER Flower Boxes are a versatile option for your gardening needs. Each pack includes three planters and 15 plant labels, making it easy for you to identify your plants. The perfect size allows you to grow a variety of indoor and outdoor plants, including flowers and vegetables. Made from high-quality, eco-friendly plastic, these planters are durable and can be reused season after season. The unique bottom design ensures proper airflow and drainage, promoting healthy plant growth.

What We Like
Includes plant labels
Durable and eco-friendly material
Proper drainage for plants
Versatile for various plants
Convenient size for spaces
#TOP 6

ZOENHOU 6 Pack Flower Window Box Planter

17inch
ZOENHOU 6 Pack Flower Window Box Planter Cover
ZOENHOU 6 Pack 43cm Flower Window Box, 17 Inch Rectangular Plastic Window Box Planter with Trays and 30 Green Labels for Windowsill, Patio, Garden, Home Décor, Porch

The ZOENHOU Window Box Planter is crafted from sturdy PP material, ensuring durability while being lightweight for easy movement. With predrilled holes, it offers excellent drainage, keeping your plants healthy and well-watered. The package includes six vibrant planters and 30 green labels, allowing you to add a splash of colour to your garden or patio. Once filled with soil and flowers, these rectangular planters provide stability on outdoor shelves, making them perfect for a variety of plants.

What We Like
High-quality, durable material
Easy drainage system
Vibrant colour options
Lightweight and movable
Stability on plant stands
#TOP 7

Arthur Cameron Rectangular Lined Wicker Planter

Arthur Cameron Rectangular Lined Wicker Planter Cover
Arthur Cameron Rectangular Lined Wicker Basket/Indoor Planter/Window Box (Small, Black)

The Arthur Cameron Wicker Planter is a stylish and practical addition to any home. Its full wicker weave not only enhances its aesthetic appeal but also provides durability. The plastic lining ensures that your plants stay hydrated without damaging the wicker, making it perfect for indoor use. Available in various sizes, you can choose the one that best fits your space, whether it’s for a window box or a decorative indoor planter.

What We Like
Stylish full wicker design
Durable plastic lining
Multiple size options
Versatile for indoor use
#TOP 8

HOXHA 6-Pack Indoor and Outdoor Planters

HOXHA
Yellow
6 pack -17inch
HOXHA 6-Pack Indoor and Outdoor Planters Cover
HOXHA 6 Pack Window Box Planter, 17 inches Plastic Vegetable Flower Planter Boxes with Tray, Rectangular Indoor and Outdoor Flower Pots for Windowsill, Patio, Porch, Garden Balcony

The HOXHA Window Box Planters are constructed from durable plastic, ensuring they can withstand multiple gardening seasons. Their versatile design makes them perfect for indoor and outdoor use, allowing you to enhance your windowsills, patios, or balconies. With dimensions of 17 inches long, these planters provide ample space for your plants to thrive. Additionally, the complete set includes trays, a plant spray bottle, plant labels, and mini garden tools, making your gardening experience more convenient and enjoyable.

What We Like
Durable plastic construction
Versatile indoor and outdoor use
Ample planting space
Complete gardening set included
#TOP 9

ZOENHOU 6 Pack 43cm Flower Window Box Planter

2403061519
Black
17 Inch
ZOENHOU 6 Pack 43cm Flower Window Box Planter Cover
ZOENHOU 6 Pack 43cm Flower Window Box, 17 Inch Rectangular Plastic Window Box Planter with Trays and 30 Green Labels for Windowsill, Patio, Garden, Home Décor, Porchm, Black

The ZOENHOU Window Box Planter is constructed from high-quality PP material, ensuring durability and resistance to cracking, making it suitable for both indoor and outdoor use. Its lightweight design allows you to easily reposition it as needed. Each planter features predrilled holes for drainage, ensuring your plants receive proper airflow and moisture, promoting healthy growth. Additionally, the included trays help maintain water levels during warm, dry spells, providing convenience for plant care.

What We Like
Sturdy and durable material
Lightweight and easy to move
Effective drainage system
Includes trays for moisture control
#TOP 10

LEXININ 6 PCS Grey Rectangular Planters

LEXININ
2306118
Grey
LEXININ 6 PCS Grey Rectangular Planters Cover
LEXININ 6 PCS 35 x 17 x 14cm Grey Rectangular Window Planter, Plastic Window Boxes with Trays, Flower Box Planter for Garden Patio Home

The LEXININ Rectangular Planters are ideal for adding a touch of nature to your home. With dimensions of 35 x 17 x 14cm, these plastic planters are lightweight yet durable, making them easy to handle while ensuring they last. The integrated drainage system prevents overwatering, protecting your plants and keeping your space tidy. Plus, their versatility allows you to display flowers or succulents in various settings, from your windowsill to your porch, enhancing any environment with elegance.

What We Like
Lightweight and durable material
Effective drainage system
Versatile for various settings
Moderate size for easy placement
Set of six for great value
Buying Guide Image

Frequently Asked Questions (FAQs)

1. Should a window box be wider than the window?

For the best visual effect, your window box should be at least as wide as the window but should not extend more than three inches beyond the trim on each side.

2. What sizes do window boxes come in?

Since many windows are around three feet long, almost every window box style is available in 30″ and 36″ lengths. When placing a window box on a deck or porch railing, it should fill the space without making the railing unusable.

3. What is the best depth for a window box?

A minimum of 8 inches in depth and 8 inches from front to back is required to have enough room for a selection of plants. Larger–say a foot in depth and width–is even better, particularly if you want to include a lot of plants and want them to fill out enough to overflow the box.

4. What are flower boxes under windows called?

A window box (sometimes called a window flower box or window box planter) is a type of flower container for live flowers or plants in the form of a box attached on or just below the sill of a window.

Editor's Notes

During our rectangular window boxes research, we found 185 rectangular window boxes products and shortlisted 10 quality products. We collected and analyzed 14,279 customer reviews through our big data system to write the rectangular window boxes list. We found that most customers choose rectangular window boxes with an average price of £20.15.

The rectangular window boxes are available for purchase. We have researched hundreds of brands and picked the top brands of rectangular window boxes, including RUDDINGS WOOD, KADAX, LEXININ, PINGEUI, GROWNEER. The seller of top 1 product has received honest feedback from 550 consumers with an average rating of 4.8.

Written by
Toby Butcher Avatar

Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.