Window boxes are long rectangular boxes, in which plants, usually flowers, are grown, placed on the outside or ledge of a window. Traditionally, they were made from wood or metal, but now they come in a range of materials. They are especially popular in cities such as New York with residences lacking access to outdoor space, adding nature and a splash of colour to the otherwise monocolour architecture. What size window box should I buy? Your box should not be too much longer than the windowsill to allow easy watering. How should I position my window box? Your box should be a few inches below the windowsill to ensure you do not touch the flowers when opening the window. Some plants are extremely sensitive to touch and will wilt. What plants to put in a window box? In general, most people grow annuals, although vines look fantastic. How do I secure a window box They can be secured by vinyl siding hangers and mounting brackets. As they are outside we recommend using galvanised screws, which won’t rust. If you plan to attach your box to a brick wall, you may need a hammer drill that can deal with tough masonry. Are they dangerous? Only when improperly secured. Hence, we recommend calling your local handyman to cement or drill them in place if you live in a pedestrianised area.