Reliable Systemic Weed Controluse This Easy-apply Weedkiller Powder To Rid Woody & Leafy Weeds. Particularly Useful For On Patios & Driveways. The Systemic-action Means The Weedkiller Is Absorbed Into The Plant & Runs Down To The Roots To Affect & Kill The Whole Of The Plant.deadfast Weedkiller Concetrate Kills Most Living Plant Tissue & Roots. As Such, Please Avoid All Contact With Your Prized Plants That You Want To Keep.how Do I Use It spray Application (dilution-required)for Spray Application Deadfast Weedkiller Concentrate Should Be Diluted With Clean Water. Pour The Contents Of The 100ml Sachet Into A Garden Sprayer, Or Similar, & Dilute To Make 1 Litre Of Spray. Spray Weed Leaves Lightly Until Wet, But Avoid Run-off Of The Liquid.for Best Effects, Apply From March To October When Weeds Are Actively Growing On A Large Leaf Area Allowing Plenty Of Weedkiller To Be Absorbed.effects May Be Seen Within A Few Days But Full Control Can Take Up To 4 Weeks. If It Rains Within 6 Hours Of Application Re-treatment Is Recommended. Apply This Product Carefully & Is Confined Only To Visible Weeds.tip For Afteruseafter Use Ensure That Garden Sprayers & Other Vessels Used For Application Are Thoroughly Cleaned As Traces Of The Product Left In The Equipment Can Damage Or Destroy Plants Sprayed Later.deadfast Weedkiller Contains Glyphosate. Use Plant Protection Products Safely. Always Read The Label & Product Information Before Use.