Hi-Yield Killzall Quick Weed and Grass Killer RTU Liquid 1 galA non selective systemic weed and grass killer that will eliminate undesirable vegetation roots and all in and around lawns, driveways, parking areas, between stepping stones and bricks, flower beds, trees and shrubs. Special caution should be taken to avoid spraying desired vegetation. Do not use in lawns Rainproof in 10 minutes 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