How to remove weeds and bad grass from a San Augustine lawn

by Cooljls
Weed and feed will remove some weeds but not crab grass, Johnson grass and other weeds.
  5 answers
  • Douglas Hunt Douglas Hunt on Mar 01, 2015
    Not all weed and feeds have the same active chemical, so you may need to experiment to see what works best in your lawn. Weed and feeds for St. Augustine lawns have traditionally relied on Atrazine as the weed killer, but Scotts has reformulated its Bonus S to use Metsulfuron-methyl. For crabgrass you really need to use a pre-emergent about a month before you apply your weed and feed.
  • Georgia Garrett Georgia Garrett on Mar 01, 2015
    Interestingly, I live in St. Augustine. The Scotts brand formulated specifically for St. Augustine grass is advertised heavily down here. I presume it works. Crab grass is a nuisance. I would dig as much out as possible and then put the Scotts down. With that being said, does anyone have a solution for torpedo grass? it grows in my borders and makes a mess when I have to try to remove the underground root system. I can't use weed killer because it will kill my border plants.
    • Melinda Edwards Melinda Edwards on Mar 01, 2015
      @Georgia Garrett What is torpedo grass? I have some new weeds, or whatever, and don't know what they are.
  • Jane Jane on Mar 01, 2015
    I live in Texas. I've always used "Weed B Gone" on my St. Augustine grass. Works great on broadleaf weeds. The best weed defense is a healthy lawn. Fertilize water and mow regularly . The thicker the grass, the less weeds will pop up.
  • Maryann Bukovi Maryann Bukovi on Mar 01, 2015
    how do you get ride of St Augustine grass???
    • Douglas Hunt Douglas Hunt on Mar 02, 2015
      @Maryann Bukovi I suggest you post your question as a new question using the red button at the top of the page. Far more people will see it that way.
  • Melinda Edwards Melinda Edwards on Mar 01, 2015
    We are not growing St. Aug. at my house anymore, too many pest problems, treatments are no longer working. The U of FL agriculture dept reports that current treatments will no longer kill cinch bugs and other, they are resistant. Crabgrass and some other weeds, the most invasive kinds, of course, have to be dug. I have spent many, many, many hours of digging. Now, bermuda has almost taken over the yard and I love it, still have weeds though.