Add a moisture providing GrowBrownie to your window boxes and planters, and watch your plants thrive. Windowbox.com is pleased to offer a natural alternative to plastic reservoirs, that you can just add to the bottom of your planters. GrowBrownies are made from coconut coir (husks) ground up with composted tree bark, and then mixed with a special polymer that binds it all together. The GrowBrownie is formed into rectangular shapes that can be cut or shaped as you like. The magic behind the GrowBrowie is its ability to soak up excess water, why it can hold up to 8 times its weight in water! As the top soil dries out and the plant roots need additional water, the GrowBrownie provides it, just the right amount, keeping the roots healthy and your plants looking great, all the while reducing the number of times a month you have to water the planter. Windowbox.com can accommodate special requests for commercial projects as well. Call us for a quote at (888) 427-3362.