Include water storing GrowBrownies with your next purchase of a window box or planter from Windowbox.com. GrowBrownies distribute water evenly and in just the right proportions to your plants and flowers, allowing them to flourish with ease. Each GrowBrownie has been fabricated from natural water storing coconut husk fibers and tree bark that is mixed together with a particular polymer to create a very absorbent and porous "brownie". Place the GrowBrownie in the bottom of your planter and add soil, and top water. You will be able to give your plants extra water, as the GrowBrownie will store and absorb excess water, saving it for future use- and feeding the plants just when they need it, never over or under watering. These GrowBrownies can be used in all sorts of applications, on green roofs, vertical gardens, or in potted plants. Call Windowbox.com with any custom or commercial requests, we will be happy to provide an estimate. (888)427-3362.