Sea Salt Plus Vinegar Weed & Grass Killer is a quick-acting, non-selective contact herbicide containing an acid for which the residues degrade promptly in the soil. Foliar contact results in rapid desiccation and control of annual weeds and grasses, and top growth reduction of herbaceous perennial weeds and grasses (see table below). For control of established perennial weeds, retreatment may be necessary. This product may be applied up to two days before harvest. Use this product to control weeds that surround all food crops, nonfood crops (ornamentals) and non-production agricultural, farmstead, right-of-way, and institutional land sites. Use to control weeds in interstate freeways/highways, federal and state highways and city/county rods and walkways, railroad vacant lots. Suitable to keep down weeds in all botanical and private association ornamental gardens, kennels, dog runs, and other animal enclosures and walkways. EARLY SEASON ANNUAL WEED CONTROL: Apply this product when weeds are small (3 to 5 leaf stage) and actively growing. Spray this product on unwanted weeds (vegetation) to the point of wetness. For best results spray on dry leaves at temperatures between 50 and 75 degrees Fahrenheit. Conditions of high evaporation rates (temperatures high than 75 degrees Fahrenheit and low relative humidity) may result in reduced efficacy. Since dilution of this product will reduce effectiveness, avoid dilution. See back label for a full list of typical weeds controlled and application instructions.