Dealing with molehills: An expert’s guide to understanding and managing those mounds of dirt

Molehills—those unsightly little mounds of soil that seem to pop up overnight—can quickly turn a pristine lawn into what looks like a minefield. These tell-tale piles of dirt are actually a clear sign of mole activity right under your feet. This small mammal is constantly digging subterranean tunnels in a never-ending search for food. As it clears a path, it pushes the excavated soil to the surface, creating those frustrating mounds.

This article will take a deep dive into these molehills, which are a common source of frustration for homeowners and gardeners alike. We’ll also provide a straightforward guide on how to get rid of these dirt mounds and take back your yard.

What Exactly Is a Molehill? Definition and Formation

As we touched on earlier, a molehill is a mound of earth on the surface, created by a mole as it digs its network of tunnels underground. Moles are high-energy animals that must eat constantly; if they go without food for just 6 hours, they’ll die. This puts them in a perpetual hunt for their next meal.

So, how does a mole find its food? By digging new tunnels and continuously clearing soil to keep its passageways open. This is precisely how you end up with a complex network of tunnels and countless molehills scattered across your garden.

A mole’s tunnels are typically less than 20 centimeters deep, but in some cases, they can go much deeper—up to 50 centimeters! The entire tunnel system can range from 100 to over 200 meters in length. Within this network, there are two primary types of tunnels:

• Main Tunnels: These are the mole’s high-traffic routes, and they often appear on the surface as straight lines of interconnected molehills.
• Hunting and Secondary Tunnels: These are dug and used by a single mole specifically to forage for earthworms. They are marked by smaller molehills that don’t follow a clear pattern.

Ultimately, molehills are simply exit points for excavated soil during tunnel construction. They also help to aerate the tunnel system and expel moisture.

On a side note, as we’ll explore further below, some molehills are noticeably larger than others, and the biggest one is a sign of something truly special.

1.Understanding the Underground: How Molehills and Tunnels Connect

To truly grasp how molehills form, you need to understand the mole’s underground world. Think of it like a city subway map—it’s a system of interconnected tunnels with multiple exits to the surface, each marked by a molehill.

These mounds are typically described as small, rounded piles of dirt. If you examine the soil itself, you’ll find it’s very loose and crumbly. In fact, you can easily gather this soil and reuse it in your vegetable patch, for your potted plants, or for starting seedlings.

A mole’s front paws are wide and shovel-shaped, perfect for digging through soil and pushing it up to the surface. By clearing the earth, the mole creates a protective cover for its tunnels. It’s fascinating to realize that these mounds aren’t just created randomly—there’s a method behind the madness.

You’ll often find one molehill that stands out, a pile of soil that’s five times bigger than all the rest. This larger mound hides the mole’s nest, where it raises and protects its young. Since the nest is a large, hollow space underground, the mole has to move a significantly greater amount of soil to build it compared to a regular tunnel.

2.A Small Mound with a Hole

Moles create molehills to get rid of soil, to close off their tunnel network, and to stay safe. In some rare cases, you might spot a molehill with an open hole, as if the mole failed to cover its tunnel entrance.

A crucial thing to know is that a mole will always seal its tunnels if it’s still inside. If you find a molehill with an open hole, it means the mole has moved on, or perhaps a predator has gotten to it. What is certain is that if the hole isn’t quickly filled in, the mole is no longer in residence.

3.Fresh vs. Old Molehills: A Gardener’s Guide to Identification

While we’ll get into this in more detail later, knowing the difference between fresh and old molehills is essential if you want to get rid of the mounds that have taken over your garden.

An old molehill is often flattened from rain and general wear. You might spot some mounds that are more crushed than others. Sometimes, you’ll even notice that grass or weeds have started to grow on them. If you see this, you’re looking at an old molehill.

New molehills, on the other hand, look completely different. The soil appears as though it has just been pushed up from below. They are often more granular than the older ones, and you might see small cracks on the surface. You will never find any vegetation growing on a fresh molehill.

4.How to Fight Back Against Molehills

Managing molehills can become a real obsession when a mole takes up residence in your garden. With each new day, you see more and more piles of dirt, and the damage to your lawn just keeps growing.

To save your garden from ruin, you need to act fast. The most effective way to eliminate molehills is to use traditional mechanical traps that have been pre-aged in soil. These are the only ones we sell on our website. Simply set these traps in new molehills, and you’re guaranteed to catch and get rid of the mole. On our store, you’ll find all the instructions and a detailed guide on how to do this.

We refuse to sell any of the other so-called solutions on the market, as we consider them to be completely ineffective.
In a nutshell:

• Ultrasonic Repellents: They don’t work. Moles are used to natural outdoor noises.
• Firecrackers: They’re dangerous. If you have kids or pets, it’s a major risk. If it rains, the firecracker could get wet and fail to go off. They are also extremely expensive, and the noise will be heard by your neighbors—and you—even in the middle of the night if the mole sets one off. In fact, one of our readers commented on our article about mole deterrents, sharing that he now wears hearing aids because of an uncontrolled explosion. We strongly advise against this solution.
• Anti-mole Plants: They have never worked. How could a plant possibly scare off an animal? What a mole cares about is the food in your soil, nothing else.
• Glass Shards: This is a myth. They do absolutely nothing to the mole.
• Anti-mole Poison: This also doesn’t work. Moles eat only earthworms and insects; they don’t consume inert material, so they will never touch poison.

We could go on and on, detailing all the other false solutions out there, but we’ve already written a number of detailed articles on this very topic.

5.Making Molehill Soil Useful: A Practical Solution

The problem with molehills is that the mole is simply pushing your garden’s valuable topsoil to the surface. The more tunnels it digs, the greater the risk that your yard could become soft and sink underfoot.

This is why the soil from molehills can be used to fill in the tunnels and put the earth back where it belongs. It can also be repurposed in your garden for plants, trees, seedlings, and even your compost.

6.Conclusion

Molehills are a fundamental part of a mole’s underground life. They create these mounds to clear soil as they dig their tunnels, which they use to hunt, travel, and breed. While molehills can certainly be a nuisance in gardens and fields, effective control methods do exist. The only proven solution is trapping with a traditional “putange” trap. Managing molehills requires a tailored approach and a solid understanding of mole biology.

By gaining a better understanding of how molehills are formed, their purpose, and their impact, you can choose the most appropriate strategies to manage moles in your garden. Don’t hesitate to comment and share your own experiences below!