Hi-Yield Super Concentrate Killzall Weed and Grass Killer is a post-emergent, non-selective herbicide with a multiple-use formulation. Using a double-surfactant formulation of 41% Glyphosate, Super Concentrate Killzall works quickly to eliminate systemically broadleaf or grassy weeds, clear turf for lawn renovation, prevent stump regrowth, and clean areas near fences, paths, patios, driveways, and buildings. Killzall should be applied to actively growing weeds, preferably before the seed heads form. Killzall Super Concentrate control annual and perennial weeds, brush, and grasses such as annual bluegrass, barnyardgress, clover, foxtail, goosegrass, knotweed, alder, Bermudagrass, blackberries, common ragweed, dandelion, kudzu, honeysuckle, milkweed, pampasgrass, zoysia and dozens more - even hard to kill types. While Killzall will control any plant you treat, it will not transfer through soil to neighboring plants. Killzall is rain fast in 24 hours and kills weeds and grasses down to the root.