Kills tough weeds, brambles and nettles Breaks down naturally in the soil to allow replanting One use is effective for most weeds however another application may be required after 3-4 weeks Contains glyphosate Ready to use – no need to dilute Easy-to-use spray bottle 1 litre treats up to 30m² of unwanted vegetation 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.