Ferti-Lome F-Stop Lawn and Garden Fungicide RTS is a ready-to-use formula that provides protection against major lawn and plant diseases. It can be used on roses, flowers, shrubs, berries, fruits, nuts, vegetables, and lawns, and becomes rainproof within two hours. Apply once every two weeks on ornamental shrubs and flowers throughout the growing season until diseases are no longer present, making sure to cover both the upper and lower leaf surfaces. One quart treats up to 1500 square feet of lawn area.