Flower window boxes are decorative containers that are typically mounted on the exterior of windows to hold flowers and plants. They add a pop of color and beauty to the outside of a building, creating a charming and welcoming atmosphere. Flower window boxes come in a variety of materials, such as wood, metal, and plastic, and can be customized to match the style and aesthetic of the building. They are a popular choice for homeowners and businesses looking to enhance their curb appeal and create a more inviting outdoor space.