How do you kill roots of trees?

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I have cut down some conifers at the side of the lawn but the roots have spread under the grass. How can I get rid of these roots, so as I can either plant flowers or extend the lawn?

  6 answers
  • Jerry Jerry on Feb 17, 2019

    Are the roots still alive and growing? If so, and you have enough stump left, cut off more stump down to fresh wood, make some criss cross cuts across the top, paint with straight Roundup and sprinkle salt on top. This will kill the roots. To get rid of them you will either have to dig them up or wait for them to rot (years). Good luck

  • Ken Erickson Ken Erickson on Feb 17, 2019

    Another tough situation. If the stumps are still there you can get a trunk and root killer. You may have to dig up the roots.

  • Lynn Sorrell Lynn Sorrell on Feb 17, 2019

    If they are actually regrowing new trees you can use Round-Up it is applied to new growth absorbed into stems/stalks then into root system killing plant ; the woodier the stalk,stems,trunks the stronger the solution you'll need--you'll need to get concentrate & use it straight use food coloring to dye it (so you can see where you have applied it) don't get in wet solution,don't use in breeze or wind,wear gloves. you'll need to repeat process spraying onto each new start/sprout you see coming up. you can dump onto stumps but you'll need to dig it out some making like a small bowl ontop to hold concentrate so it will be absorbed. Anytime you cut off trees,shrubs,plants all you are doing is basically prunning it encouraging it to regrow elsewhere "Mother Nature" is miraculous like that, plants trying to defy the odds & survive, some plants are much more hardy so getting them to stop growing is much more time consuming.

    • Violet Stewart Violet Stewart on Feb 18, 2019

      Hi Lynn


      This sounds like a good idea too but it is going to be a lengthy process. Thanks for your promt reply

      Violet Stewart

  • Oliva Oliva on Feb 17, 2019

    If you own a mattock tool, you can also try chipping away at tree roots to hasten their demise. If you can burn, you can drill large holes in the stump, fill with a liquid available at agricultural stores, then ignite the liquid. Otherwise, pour "Hot Lime " and Borax down the holes and water, slightly. The combination is repoted to draw moisture from the stump, killing it.

    • Violet Stewart Violet Stewart on Feb 18, 2019

      Hi Oliva

      I will be able to try burning as there is nothing near the stumps. Thanks

      Violet Stewart

  • 1401470 1401470 on Feb 17, 2019

    Sprinkle Salt around the base of the tree.

  • Violet Stewart Violet Stewart on Feb 18, 2019

    HI Carole

    I have plenty of salt so will sprinkle some round the base of the tree (in the hope that it isn't needed for the road. Many thanks

    Violet Stewart

    • Ken Erickson Ken Erickson on Feb 18, 2019

      Save your salt for the tree. Use fertilizer for ice removal and prevention on your concrete walks and driveway. Fertilizer is cheaper, doesn't ruin your concrete, and the excess can help your plants.

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