The Roundup weedkiller is designed to kill weeds all around the garden. It has a systemic action which will permeate the roots so that the weeds won't grow back. The fast-action solution gets degraded by the microorganisms in the soil allowing replanting. The Pump 'N' Go unit contains a pressure sprayer, so to apply simply pump the handle a few times and enjoy a continuous spray for 10 minutes. Ideal for spraying large areas and preventing tired hands. This is best used in dry and non-windy conditions to prevent the formula from being washed off, or blown onto other plants. Size: 5L. Treats up to 150 square metres.