How To Get Rid Of Tree Roots In Lawn
Tree roots in the lawn are one of those gardener’s headaches that arrive quietly: a raised turf, broken sprinkler lines, mossy patches and the sudden appearance of a root that looks like it belongs in a pirate movie. I’ve wrestled with roots in my own yard more than once, and in this article I’ll share practical, proven ways to remove or manage them without destroying your lawn or killing the tree you want to keep.
Why tree roots invade the lawn
Trees send roots into lawns because they are searching for water, oxygen and nutrients. Some species — willow, poplar, silver maple, and elm — are especially aggressive. Roots near the surface cause bumps, lift sidewalks and compete with grass for moisture and fertilizer. Before you act, consider whether the tree is worth keeping and whether the roots are causing serious damage or only cosmetic issues. My own rule is: if the tree provides shade, beauty or habitat, treat roots with care and avoid heavy-handed methods that damage tree health.
Safe strategies to get rid of or manage roots
There’s no single magic trick; the best approach depends on root size, how close the tree trunk is, and whether you want the tree to survive. Here are strategies that have worked for me and many gardeners.
- Root pruning — For small-to-medium roots, carefully dig a trench on the side where roots are intruding. Use a sharp pruning saw or loppers to cut roots cleanly. Paint the cut with pruning sealer or apply a layer of clean soil; this reduces disease entry. Note: don’t remove more than 20–30% of a tree’s root system — doing so can stress or kill the tree.
- Root barrier installation — Installing a vertical barrier between tree and lawn prevents new roots from crossing into turf areas. I’ve used 2–3 mm thick polyethylene barriers at about 18–24 inches deep with good results. Dig a narrow trench, slide the barrier in, and backfill. This is a long-term solution that works well beside driveways and garden beds.
- Stump grinding and root removal — If the tree is gone and you need roots removed, rent a stump grinder for the stump and a small root saw or backhoe for deeper roots. Grinding down a stump speeds decay, but large lateral roots may still remain; dig or cut them out as needed. I once rented a grinder and it saved me days of digging.
- Selective herbicide application — If you’re removing a stump and want to prevent suckering or regrowth, apply a systemic herbicide (glyphosate or triclopyr formulations labeled for stump treatment) directly to the freshly cut stump or exposed root bark. Follow label directions and local regulations closely. This kills roots without widespread soil contamination when applied properly.
- Mechanical excavation — For small roots near the surface, a mattock, root saw or even a reciprocating saw can do the job. Work in small sections so you don’t destabilize the tree. I prefer a mattock for shallow roots; it’s satisfying and precise.
- Replace lawn with root-tolerant planting — If roots are persistent and the soil is too congested, consider replacing grass with shade-tolerant groundcovers, mulched beds, or hardscaping. It’s an effective, low-maintenance option I’ve adopted under a large oak where grass never thrived.
What to avoid
- Do not sever the major roots close to the trunk — it can destabilize and eventually kill the tree.
- Avoid spilling herbicide indiscriminately; only use targeted stump treatments when necessary.
- Don’t use excessive salt or household chemicals to kill roots — they can ruin soil structure and harm nearby plants.
After removal: renovating the lawn
Once large roots and stumps are out, you’ll have a mess to repair. Here’s how I restore a smooth, healthy lawn:
- Fill holes with a mix of quality topsoil and compost, tamping lightly to reduce settling.
- Regrade to restore proper drainage and avoid low spots where water pools.
- Reseed or lay sod appropriate for your light conditions, and keep new lawn well-watered until established.
- Mulch any remaining exposed roots if you keep the tree — a 2–3 inch layer of organic mulch conserves moisture and hides unsightly roots while protecting them from lawnmower damage.
“Patience pays off with roots. Quick, aggressive cuts often come back. Gentle pruning, barriers and proper lawn renovation make the difference.”
When to call a professional
If roots are lifting foundations, invading sewer lines, or the tree is large and near structures, hire an arborist or certified tree contractor. I’ve called pros when roots entwined with my drainage pipes — they had the right equipment and expertise to remove roots without harming the tree or utilities.
Final tips from my experience
Start by identifying the tree species and location of problem roots. Work slowly, keep the tree’s health in mind, and prefer physical methods first. If you must use herbicide, use it carefully and legally. Sometimes the best answer is redesign: swap turf for mulch and shade-loving plants where roots dominate. I’ve found that embracing the tree rather than warring with its roots usually gives the most attractive, long-term outcome.
Getting rid of troublesome roots in the lawn is a mix of strategy, elbow grease and respect for the tree’s life. With the right tools and a thoughtful plan you can reclaim your lawn without unnecessary damage — and often end up with a healthier garden in the process.
