Moles Eat Insects, Not Roots: A Homeowner’s Vole Check
Moles Eat Insects, Not Roots: A Homeowner’s Vole Check
No, moles rarely eat plant roots. They are insectivores, feeding mainly on earthworms and grubs, and they commonly eat 70 to 100% of their body weight in prey every single day. That appetite is what drives their constant tunneling. If you’re seeing roots that look chewed or girdled rather than just displaced, check the identification section below: that pattern usually points to voles, not moles.
TL;DR:
- Raised, twisting ridges and volcano shaped mounds indicate moles, while flattened runways about 1.5 inches wide and neat gnaw marks point to voles.
- Mole tunnels can loosen soil around roots, bury seedlings, or expose irrigation lines; voles and mice may also use those tunnels to reach bulbs.
- Light activity can aerate compacted soil and reduce grubs, but repeated plant loss, widespread molehills, or tripping and irrigation hazards warrant intervention.
- Flatten a tunnel and check back later; if it rises again, targeted trapping is more direct than repellents or grub treatments, which leave earthworms available.
Table of Contents
- What moles eat and why they tunnel
- How mole tunneling can indirectly damage plants
- How to tell mole damage from vole (and other rodent) damage
- When mole activity is cosmetic and when it’s a problem
- How to inspect, reduce habitat, and control mole activity
- A pragmatic homeowner’s take on mole damage
- When it makes sense to call in a professional for mole removal
- FAQ
- Sources
What moles eat and why they tunnel
Moles are not rodents, and they don’t eat the way rodents do. They’re insectivores, and their diet consists almost entirely of earthworms, grubs, and other soil-dwelling invertebrates. Plant matter rarely factors into what they’re after.
That diet explains the digging. Because moles burn through so much energy hunting underground, they need to eat 70 to 100% of their body weight daily just to survive, according to the Home & Garden Information Center at Clemson University. A mole weighing around 5 ounces can work through roughly 50 pounds of worms and insects in a year. That kind of intake requires nonstop tunneling to locate enough food, which is why a single mole can leave a surprising amount of surface disturbance behind.
Occasionally a mole might swallow a seed or bit of plant material while foraging, but extension researchers note this is incidental. It doesn’t mean moles are seeking out bulbs or roots as a food source. Their tunnels run close to where earthworms concentrate, not where root systems happen to be.
How mole tunneling can indirectly damage plants
A plant can die after a mole tunnels nearby without the mole ever touching its roots. The damage is mechanical, not dietary.
When a mole digs, it lifts and loosens the surrounding soil. That process can create air pockets around root systems, and roots exposed to air instead of packed soil tend to dry out or shift position. The UC Statewide IPM Program points out that this kind of mechanical disruption, not feeding, is the usual explanation when a plant declines near mole activity.
Surface molehills add a second layer of trouble. Mounded soil can bury small seedlings, cover sprinkler heads or irrigation lines, and create uneven ground that’s a hazard for mowers or for anyone walking the yard.
There’s a third factor worth knowing: mole tunnels can become shortcuts for other animals. Voles and mice sometimes move into abandoned or active mole tunnels, and once they’re in, they’ll gladly eat the roots and bulbs a mole left untouched. That’s often how a mole gets blamed for damage a different animal actually caused.
How to tell mole damage from vole (and other rodent) damage
Correct identification matters because the fixes for moles and voles are completely different. Trapping that removes a mole does nothing to stop a vole colony chewing through a flower bed.
Start with what you see on the surface:
- Mole feeder tunnels show up as raised, twisting ridges just under the lawn’s surface.
- Deeper mole travel tunnels produce volcano-shaped molehills with soil piled around an opening.
- Vole runways are shallow, flattened, and kept clear, usually about 1.5 inches wide.
- Neat gnaw marks or girdling at the base of bark point to voles, since they have incisors built for chewing plant tissue.
A quick inspection can usually settle the question:
- Measure the width of any visible runway or ridge; narrow, clean-edged paths suggest voles, while raised twisting ridges suggest moles.
- Look for droppings or chew marks on stems and tree trunks near ground level.
- Check whether uprooted plants show bite marks on the roots themselves, since mole-related tunneling tends to leave roots dried or displaced but not gnawed.
- Flatten a short section of tunnel with your foot and come back in a day or two to see if it’s been pushed back up.
If roots are visibly chewed, you’re likely dealing with voles, and the Clemson HGIC notes that insect-focused mole treatments won’t touch a vole problem since voles are after plant tissue, not bugs.
When mole activity is cosmetic and when it’s a problem
Not every mole in your yard needs to go. A low level of mole activity actually helps the soil: their tunneling aerates compacted ground, and their appetite for grubs and other pests provides a form of natural pest control. Some WSU Extension guidance frames light mole presence as something many landscapes can tolerate and simply repair as it occurs.
That said, certain signs mean it’s time to act rather than wait it out: repeated uprooting of the same plantings, molehills scattered across large sections of lawn, or tunnels interfering with irrigation lines or creating tripping hazards.
Moles stay active all year. They dig deeper in cold or dry weather and closer to the surface when the ground is moist, which is why visible damage tends to spike in spring and fall.
How to inspect, reduce habitat, and control mole activity
A clear process beats guessing every time. Start with inspection, then adjust habitat, then move to removal if the activity continues.
- Flatten a section of active tunnel and check it again later; re-excavation confirms the tunnel is still in use.
- Walk the yard looking for fresh molehills versus old, grass-covered ones to gauge how recent the activity is.
- Clear dense ground cover, leaf litter, and piles of mulch or wood near trunks, since these conditions favor voles and can mask mole runways.
- Keep mower height moderate rather than letting turf grow long, which reduces the cover voles rely on.
- Avoid grub-only treatments as a stand-alone fix, according to Rutgers NJAES.t grub treatments often fail to remove moles because earthworms remain a steady food source regardless of grub levels.
For small beds, temporary tamping down of ridges and simple exclusion barriers can limit cosmetic damage while you figure out next steps. But for an active, established mole, trapping remains the most direct removal method, since it targets the specific animal causing the damage rather than relying on repellents or baits that moles often avoid or that can pose risks to other wildlife.
Pro Tip: If a flattened tunnel section is pushed back up when you check it later, that’s a strong sign of an active mole worth targeting directly.
A pragmatic homeowner’s take on mole damage
If roots look gnawed rather than just displaced, assume voles first and check before you treat anything. Misdiagnosing the animal wastes time and money on the wrong fix.
For damage that keeps coming back or starts creating hazards in the yard, professional trapping tends to resolve an active mole faster and more reliably than repellents or grub treatments ever do. I’d rather see a homeowner use one targeted trap than a broad pesticide that kills the earthworms and beneficial organisms the soil depends on.
— Mak
When it makes sense to call in a professional for mole removal
If you’ve confirmed it’s a mole and the damage keeps recurring across your lawn, bringing in a specialist usually settles it faster than another round of home remedies. We at The Mole Busters deal exclusively with moles and gophers in Oregon, which means every inspection and trap placement is built around how these animals actually behave on your property, not generic pest advice.
It’s worth calling in help when mole activity keeps returning season after season, when tunneling threatens plantings or irrigation lines, or when earlier DIY attempts to haven’t held up. Our Mole Service uses targeted trapping, and our Mole Removal and trapping services page has details if you’d like to request an estimate for your yard.
FAQ
Will moles eat plants?
Moles rarely eat plants directly since they’re insectivores that feed on earthworms, grubs, and other soil invertebrates. Any plant damage near mole tunnels is usually mechanical, caused by disturbed soil, air pockets, or buried seedlings rather than feeding.
Does Dawn dish soap kill mole crickets?
Dish soap solutions are sometimes used as a home test to flush mole crickets to the surface for identification, not as a reliable way to kill them. For an actual mole problem specifically, soap-based mixtures aren’t a recognized control method since moles are a different animal entirely from mole crickets.
What does lawn damage from moles look like?
Mole damage shows up as raised, twisting ridges from shallow feeder tunnels and volcano-shaped molehills where deeper tunnels reach the surface. This differs from vole damage, which leaves narrow, flattened surface runways about 1.5 inches wide.
What time of year are moles most active?
Moles are active year-round but tunnel closer to the surface in moist, warm conditions when earthworms are easier to reach. Visible lawn damage often spikes in spring and fall as moles adjust their depth with changing soil moisture.
How can I tell if a tunnel is still active?
Flatten a short section of the tunnel and check back later. If it’s pushed back up, the tunnel is active and worth targeting with a trap placed directly in that section.
Sources
Extension and university sources are consistent on this point: moles are insectivores and seldom eat plant roots, and the plant loss homeowners notice is almost always a side effect of tunneling rather than feeding.
Rutgers NJAES and the UC Statewide IPM Program both emphasize that correctly telling moles apart from voles shapes every decision that follows, since the two animals require different control approaches entirely. Their shared recommendation is practical: tolerate minor mole activity where you can live with it, and reach for targeted trapping or habitat changes when the activity becomes recurring or damaging rather than defaulting to broad pesticide use.
- How to Tell the Difference Between Moles and Voles | Home & Garden Information Center
- Moles / Home and Landscape / UC Statewide IPM Program (UC IPM)
- Mole Ecology and Damage Management (G3997-003)
- FS025: Mole Management in Turf and Gardens (Rutgers NJAES)
