When dealing with tough weeds, you need the fastest Killzall Weed & Grass Killer on the market! Hi-Yield Killzall Quick is a non-selective systemic weed and grass killer that will get rid of nearly all vegetation – roots and all. Use Killzall in and around lawns, driveways, parking areas, between stepping stones and bricks, flower beds, trees and shrubs. Special care should be taken to avoid spraying desired vegetation. We recommend using a piece of cardboard to shield desired plants. Killzall Quick is rainproof in 10 minutes, and reaches the roots in 1 to 2 hours. Visible results in as little as 3 hours. May be applied when temperatures are as low as 50 degrees. 1 gallon bottle with sprayer.