72in. Ultimate Fiberglass Window Box

The "Supreme Flowerbox" window box is made of high strength maintenance-free fiberglass. "Supreme Flowerbox" window boxes are lightweight and easy to install. These three-ply fiberglass shells won’t rot, stain, bleach, freeze, or become disjointed. Each Supreme Flowerbox window box includes a custom drainage mat designed to channel water over the convex bottom to drainage holes located in the end-cap. The Supreme Flowerbox drainage mat replaces pebbles, prevents over-watering and circulates air and heat to plant roots which encourages faster growth and healthier plants.