Kills all types of weeds and grasses. For use on patios, walkways, driveways, around trees and shrubs, along fences and foundations and in other areas of your yard. Apply when weeds are actively growing. For best results, apply during warm, sunny weather (above 60 F.). Cloudy, cooler weather may delay or reduce efficiency. Spray when air is calm to prevent drift to desirable plants. If it rains within 24 hours of spraying, retreatment may be necessary. This offers the only complete line of insecticides, fungicides and herbicides which are EPA exempt. weed & grass killer patio walkways Ecosmart foundation along fences around shrubs driveways trees.