Doff Advanced Weedkiller Ready To Use 1L Spray Bottle is a highly effective glyphosate based weedkiller. A systematic weedkiller for the control of annual and deep rooted perennial weeds such as grasses, docks, nettles, willowherb, dandelion and many more. This ready to use weedkiller does not need diluting and will kill most weeds down to their roots with just one application. It is packaged in a one litre easy to use spray bottle which treats up to 30m².