Roundup total weedkiller is a 3 litre ready to use weedkiller designed to kill weeds all around the garden it has a systemic action which will permeate the roots so that the weeds wont grow back any solution that lands on the soil is degraded by micro organisms to allow replantingits a ready to use formula so to apply simply pull the trigger to spray the weeds this is best used in dry and non windy conditions to prevent the formula being washed off or blown on to other plantswarningfor