Abstract: An insert for a planting container is useful to support planting soil above a water reservoir. A base member includes several leg openings, a fill tube opening, and a plurality of air vents. Hollow leg members are attached to the base member to maintain the base member above the floor of the container. The leg members have conduits that are open to the leg openings. Flaps are flexibly connected to the periphery of the base member. The flaps contact the inside walls of the container and prevent soil from falling beneath the insert. A fill tube is positioned in the fill tube opening and is designed to extend from the floor of the container to a position above the soil. Water added to the fill tube creates a water reservoir beneath the base member. A webbed cover portion attached to the bottom of the leg members has slots that allow water to enter the conduits of the leg members. Soil may fill the conduits and draw water from the reservoir, while soil on the base member is aerated through the air vents.