Get rid of unwanted weeds from the garden with Roundup Weed Killer. This one-litre pack of ready-to-use weed killer has a systemic action which will permeate the roots so that the weeds won't grow back. Any solution that lands on the soil are degraded by microorganisms to allow replanting. It's ready to use formula so to apply simply pull the trigger to spray the weeds. Use this in dry and non-windy conditions to prevent the formula from being washed off, or blown onto other plants. Size: 1L. Treats up to 30 square metres.