Specially formulated lawn weedkiller Kills weeds, not grass Convenient ready-to-use spray bottle Can be used for spot treatment of weeds Kills most lawn weeds including dandelions, daisies, white clover, buttercups & yarrow 1 litre treats up to 50m² of lawn Doff Lawn Weedkiller has been specially formulated to kill common lawn weeds without damaging the grass. The active ingredients Mecoprop-P and Dicamba target broad-leafed weeds. This weedkiller is best used when the weeds are growing from late spring until early autumn. It should not be used on new lawns that are less than six months old. Once the weedkiller has dried the area is safe for children and pets.