Roundup Tough & Deep Root Weedkiller - 1L Ready to use Roundup weedkiller is ideal for clearing areas and eliminating tougher, deep-rooted weeds such as nettles, brambles, thistles and couch. Roundup is a deceptively fast worker. After initially spraying Roundup on to a weed, you might be forgiven for thinking nothing much is happening, apart from some visible yellowing of the leaves and stem after 48 hours. But, that's just on the outside. On the inside of the weed, the systemic action takes Roundup right down to the weed's growing points and, put simply, kills the weed from 'inside out'.   Most importantly, of course, because Roundup kills the roots, you can rest easy knowing the weed's not coming back. Anti-drip foam formula Drip guard 2 spray patterns Child-safe trigger