Tree Watering Bags provide slow and controlled irrigation to the trees, allowing a better saturation of deep waters, promoting the deep growth of the tree roots, reducing the shock of transplants and drought stress. Its doughnut shape makes it adjustable so it can easily fit around the base of any tree, shrub, or bush. Made of strong PVC that can naturally withstand UV, color and low-profile blends with landscape, reduce visibility while in use, specially-made PVC fill cap and locking cap design. Slow release circular irrigation bag. This slowly leaches water into your soil directly around the tree where it can be easily obtained by the roots and surrounding soil for complete coverage. 15 gal. capacity per bag can release water about a 1-6 hour period for a deep saturation. Perfect for watering newly planted trees, evergreens, shade and ornamental trees, as well as large shrubs with branches at least 6 in. off the ground or higher, promotes deep root growth. Convenient handle allows for easy filling, just place the bag on level ground around the truck of a new tree or shrub, filling via hose, pipe or other suitable way, no need special tools, walk away after filling, automatic watering save your effort.