Liquid concentrate weedkiller provides economical control of large areas of weeds. It starts working in hours to kill weeds and roots. The systemic action takes Roundup right down to the weed's growing points to kill all weeds from 'inside out'. Kills annual weeds and deep-rooted perennial weeds such as ground elder and bindweed, it fully degrades in soil allowing replanting and comes with handy measuring cap with child-resistant closure.  Roundup GC is a concentrate glyphosate weedkiller that kills weeds right down to the roots so they don't come back Diluted in water and sprayed lightly onto weed leaves it starts working in hours 280ml treats 280 sq.m (336 sq.yd)