Verve root killing ready to use weed killer 36lthis ready to use weed killer controls most annual and deep rooted perennial weeds in a single application its ready to use turn rotate nozzle to spray or jet spray weed leaves lightly until visibly moistened but avoid wetting to run off use between february and september when weeds are actively growing and have a large leaf area treat perennial weeds like dandelions and docks from june to august use on a calm day it covers 144m so yo