How do I get rid of huge quantities of ants building nests in my yard?

They have been there 3 years now. I have tried diatamtious earth and it did nothing but put big white spots in the grass.
  6 answers
  • Mis23269308 Mis23269308 on Jun 12, 2017
    Use your feet. Step by step by step. It's slow but certain

  • Deb Deb on Jun 12, 2017
    pouring boiling water on the hills everytime you see the hills come back worked for me.

  • Rnl24640807 Rnl24640807 on Jun 12, 2017
    A few decades ago 'Organic Gardening' magazine posted a sure fire ant bait: 2 cups water, 1 tsp boric acid powder, 6 Tbsp sugar. Boric acid powder is available and inexpensive in the pharmacy of my local Walmart. Make the mix, soak a few cotton balls and make dispensers out of old margarine containers (or whatever) by making slits in the top, placing soaked balls inside and covering with lid. Place outside. I usually dribble a bit outside the container to begin quicker attraction. The slits permit ants in, critters out. This is a weaker solution than some ant baits which is why it is effective. They carry bait to the nest and within 3 or 4 weeks the nest is dead. No, it isn't instant but it truly works. It will even kill fire ant nests if you are patient.

  • Ash13611407 Ash13611407 on Jun 13, 2017
    Ant powder on ant mounds, I had loads of ants now majority all gone.
    I had a mix of black and red ants

  • Judy Judy on Jun 13, 2017
    boiling water on the nests

  • Darlene Darlene on Jun 19, 2017
    I used borax on several huge ant hills in my yard. That was several years ago and the ants never came back. I am currently working on an ant trail and hill at the back of my property. Good luck.