Plant Problem Diagnostic
Moles in the Lawn: Tunnels, Mounds, and What Actually Works
The short answer
Moles announce themselves with low raised ridges snaking across the lawn, shallow feeding tunnels pushed up just under the surface, plus rounded volcano-like mounds of loose soil from deeper tunnels. Moles are insectivores: they eat earthworms, grubs, beetles, and insect larvae, not plants. Plants along mole tunnels die only indirectly, when roots are lifted and dry out. If plants are actually being eaten, or you see open surface runways worn into the grass, the culprit is voles (or another rodent using old mole tunnels), not moles.
Extension sources are blunt about controls: trapping is the most effective method for moles. Killing grubs does not remove moles, because earthworms are a mainstay of their diet, and repellents, vibrating devices, and home remedies lack reliable evidence. Moles also do some good, aerating soil and eating pest larvae, so tolerating light activity is a legitimate choice.
Mole vs. vole, one more time
- Moles: raised ridges and round soil mounds; lawn spongy underfoot; no plants eaten. Diet is insects and earthworms.
- Voles: open, worn surface runways with clipped grass, small burrow holes, gnawed bark; plants eaten.
- One yard can host both; voles readily travel mole tunnels, which is why 'mole damage' sometimes includes eaten bulbs, that part is the vole.
Why the grub-control shortcut fails
A persistent myth says treat the lawn for grubs and moles will leave. Extension sources push back directly: having moles does not mean you have a grub problem, and eliminating grubs will not eliminate moles, since earthworms and other invertebrates keep the buffet open. Blanket insecticide treatments to starve moles waste money and harm beneficial soil life.
→ Moles also help: their tunneling aerates soil, and they eat many pest larvae. A few ridges in a large lawn may cost less to tolerate than to fight.
What works
- 1Tolerate and repair — Press ridges back down with your foot or a roller and water the area so lifted roots re-establish. Light damage often needs nothing more.
- 2Trap active runs — Trapping is the most effective control per Extension guidance. Find active tunnels by flattening a section and checking if it is re-raised within a day or two, then set a mole trap per its instructions. Mole trapping rules vary by state; check local wildlife regulations.
- 3Protect small areas physically — For raised beds or small prized plantings, an underground barrier of quarter-inch hardware cloth beneath and around the bed excludes moles.
What to skip
Extension reviews find no reliable support for sonic or vibrating stakes, chewing-gum or home remedies, or planting 'mole plants.' Castor-oil repellents at best push activity around temporarily. Poison baits are not recommended here: they pose risks to pets and wildlife and are regulated, check local rules before considering any lethal option.
When to call a professional
If mole activity is extensive, keeps returning, or you are not comfortable trapping, a licensed wildlife control or lawn-care professional can run a trapping program. Contact your county Extension office for operators and current regulations in your area.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- MSU Extension - Moles in the lawn — Moles are insectivores eating earthworms, grubs, and larvae; having moles does not mean a grub problem, and eliminating grubs will not eliminate moles.
- University of Maryland Extension - Moles — Shallow feeding tunnels appear as low pushed-up ridges; moles rarely eat plants and trapping is the most effective control.
- Rutgers NJAES - Mole Management in Turf and Gardens (FS025) — Moles aerate soil and eat undesirable grubs and insects; trapping is the recommended control method for turf and gardens.