A water-saving device comprising a hollow frusto-conical housing having a wide lower end adapted to overlie a ground surface and a narrow upper end. A flexible tarp is integrally connected around the circumference of the narrow upper end of the housing, and a draw string is integrally attached around the circumference of a upper end of the flexible tarp. The draw string is pulled taught to reduce the circumference of the upper end of the flexible tarp and enclose the tarp around the tree trunk.
