Metal Window Boxes
Metal window boxes are a simple way to add planting, colour and seasonal displays to windows, walls and balconies. Our metal window boxes are made to order in custom sizes and colours.
Choosing the Right Window Box Size
Typical sizes are often around 200mm × 200mm or 250mm × 250mm, although the ideal size depends on the available space, windowsill depth and the type of planting being used.
Installation and Weight Considerations
Long window boxes can become surprisingly heavy once filled with soil and plants. If using brackets, ensure they are suitably rated and fixed into a solid structure rather than decorative cladding or render.
Drainage and Positioning
When placing a window box directly on a windowsill, think about where excess water will drain. Using small feet beneath the planter can help improve airflow and prevent the surface underneath remaining constantly wet.
See a Metal Window Box Example
This 1600mm × 250mm × 250mm powder-coated planter is a popular size for window box planting and screening. Use it as a starting point and adjust the dimensions to suit your project.
Frequently Asked Questions:
Can metal window boxes be supplied in custom lengths?
Yes. All of our window boxes are made to order, allowing you to choose a length that suits your available space rather than being restricted to standard off-the-shelf sizes.
Can metal window boxes be powder-coated in different colours?
Yes. Black and white remain popular choices for town and city properties, while countryside homes often choose colours that complement brickwork, stone or timber. Anthracite Grey (RAL 7016) is particularly popular on modern homes with matching windows and doors.
Do window boxes need drainage holes?
In most cases, yes. Window boxes are typically used for planting and require drainage holes to prevent waterlogging. It is also worth considering where excess water will drain, particularly when the planter is positioned directly on a windowsill or above a paved area.
Ready to design your planter?
Use our online quote builder to create a planter in your exact size and see pricing instantly.