Add Interest to Your Outdoor Space with These Window boxes The Windsor Window boxes are made to last for years of exposure to the elements. These simple, elegant, sturdy planting boxes offer the look you want at a price you can afford. Bring color and depth to your outdoor space; purchase these window boxes to house your favorite flowers or greenery. Choose from a range of widths to fit your needs. Weather-proof aluminum brackets included. A white finish completes the look.