A shaft in a cylindrical configuration has upper and lower ends and a cylindrical passageway. A housing forms a chamber with an open top and an open bottom. The chamber is in operative communication with the passageway. A sheet has a center, a periphery and a central extent. The sheet has a deployed orientation. The deployed orientation is in a generally hemispherical configuration. The center of the sheet is supported by the housing. The periphery of the sheet is provided adjacent to ground around the shaft. In this manner the plant is covered. The sheet has a stored orientation. The center of the sheet in the passageway is provided adjacent to the lower end. The central extent of the sheet is provided there above.