The DeWitt Dew Right Tree Watering Bag provides a steady supply of water to help eliminate the severe water stress that new trees endure after transplanting. This watering bag is designed specifically to increase first-year survival rate and set the stage for a long, healthy tree life. 20-gal. watering bag empties in 5 to 8 hrs and only needs to be refilled one or two times per week for most trees. Installs easily in just 5 minutes and without tools. A single bag fits trees up to 3" in diameter. Zip two Dew Right bags together to fit trees up to 5" in diameter. Made from heavy-duty, green-coated polypropylene that's UV stabilized to last after long days in the sun. Safe to use with nutrients or chemical additives.