Rootblast concentrate tree stump and tough weedkiller contains 2x 100ml concentrate sachets designed for use on cut tree stumps brambles and tough perennial weeds for stump application simply pour direct from the sachet evenly over the stump one sachet will treat up to 3 stumps of 10 15cm diameter for spray application add one sachet into a garden sprayer and dilute with water to make 1 litre of ready to use product and apply where needed the formula will kill the root as well as the plant