Roundup 280ml All Surface Liquid Concentrate WeedkillerClear weeds around walls, fences, trees and shrubs. Renovates overgrown areas. Clears weeds from drives and patios. The liquid usually takes 7 to 10 days to translocate to the roots of the treated lawn. Size: 280ml. Liquid concentrate weed killer 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