Gtank from Grants Pass writes,
Will Killzall offer a full year kill?
Killzall Weed and Grass Killer contains glyphosate and will only kill the plants you spray it on directly and it does not leave behind a residual to kill future plants. To stop future plants from growing you will need to use a pre-emergent herbicide that is labeled for the target plants or a soil sterilent which makes the uninhabitable for most plants.
Answer last updated on: 05/04/2013