Akro-Mils Green Well Water Saver Tree Ring, 17" x 8", Black Increases the success of new plantings and conserves water usage by 25% The patented zipper joint allows the GreenWell to be removed and reused Works on sloping ground and helps hold fertilizer and mulch in place while protecting from line trimmers Made in the USA from safe to grow in recycled polypropylene Much more aesthetically pleasing than the Tree Bag, which also can't be tied around evergreens, roses, bulbs or tomatoes