Abstract: An insert for use in filling paper or plastic bags with yard waste materials. An elongate rectangular sleeve of corrugated paper board has an open top and open bottom. Weight retaining elements are formed near the bottom of opposing sidewalls of the insert. Tuck openings are formed along the length of the opposing sidewalls to receive gathered segments of the top edge of a plastic bag in which the insert is placed. Hand openings are formed near the upper ends of opposing sidewalls. The insert may be inverted while a yard waste bag is placed over it and then righted to rest in an upright position with the yard waste bag surrounding it.