What product will kill weeds but not st. Augustine grass?

by Connie
  4 answers
  • Janet Pizaro Janet Pizaro on Mar 19, 2017

    Ortho Weed-b-gone

  • Connie Connie on Mar 19, 2017


  • Tula Tula on Mar 20, 2017

    Diluted vinegar

  • Inetia Inetia on Mar 22, 2017

    I wouldn't put vinegar on my lawn because I think it will probably kill the grass too. Spectracide Weed Stop can be used on lawns and there is one that says it's for St Augustine grass (purple label). Herbicides that can be used on lawns only kill broad leaf plants. I've used this product on regular grass lawns and it works well. It may take a week before you notice it's working but it will kill the weeds within three weeks. It takes longer than harsher herbicides, but I think it's a fair trade-off.