Bayer garden super strength weedkiller sachets are concentrated systemic weedkillers ideal for all tough weed killing including japanese knotweed ivy and brambles replanting can take place immediately once weeds die simple soluble sachet application means that no measuring is required contains glyphosatewarningherbicide home garden weedkiller always read label keepchildren and pets away from treated area until dry contains 680gkgglyphosate as awaterdispersible granule harmful