How to Kill Tree Roots: 6 Ways Some methods give immediate results while others take more time. The more physical labor you apply, the faster you'll be rid of unwanted roots.

When tree roots find their way into your sewer or water lines and cause issues with your drain, acting fast is key. Here's how to kill tree roots and fix the problem.

“The best solution for bothersome surface roots is simply to mulch,” said Purcell. “Wood mulch is the best way to cover tree roots above the ground.” He suggested 2-3 inches of wood mulch to reduce ...

Next, to kill the roots, paint the fresh cuts with glyphosate (at least 41%) or triclopyr (undiluted). This is similar to the method used to kill tree roots and stumps.