How To Get Rid Of Woodlice In The Garden

So, you’ve got woodlice in your garden. Welcome to the club—it’s a surprisingly big one. These little armored tanks (aka “pill bugs” or “roly-polies”) aren’t exactly villains, but they can become a pest. They munch on seedlings, hide under pots, and generally act like tiny, crustacean squatters. Sound familiar? Let’s chat about how to kick them out.

First, let’s get one thing straight: woodlice are not insects. They’re actually land-based crustaceans, which is why they love damp, dark places. Think of them as tiny, nocturnal lobsters that gave up the sea for compost. They’re mostly harmless, but when they show up in a mob, your garden suffers.

Step 1: Dry Out Their Party Zone

Woodlice are basically moisture vampires—without the fangs or the sparkly skin. They need damp, humid spots to survive. If you dry out their hangouts, they’ll pack their tiny suitcases and leave.

Check your soil drainage. If water pools after rain, you’re basically offering them a spa day. Add some sand or organic matter to improve drainage. Also, stop overwatering. Seriously, give that hose a break. Your plants will thank you, and the woodlice will curse your name (in a very tiny, crustacean way).

Step 2: Declutter Like a Minimalist Guru

Woodlice love hiding under things. Piles of leaves, old flower pots, rocks, rotten wood—it’s all a five-star hotel to them. Remove their hiding spots and watch them panic like tourists without a map.

Rake up leaf litter and move any dead wood away from garden beds. If you have stone paths, lift them occasionally to disrupt the damp microclimate underneath. No dark, cozy corners means no woodlice condo association meetings.

Step 3: Create a “Moisture Trap” (It’s Sneaky)

Want to catch them without chemicals? Use a damp newspaper or a slice of potato. Seriously, it works. Roll up a newspaper, wet it, and place it in a shady spot. Check it the next morning—you’ll find a woodlice convention under there.

Scoop them up (gloves optional) and relocate them to a compost heap far from your prized petunias. This isn't cruel; it’s just a very gentle eviction notice. Repeat this for a week, and their population will drop like a bad habit.

Step 4: The Diatomaceous Earth Trick

This is my favorite secret weapon. Diatomaceous earth (DE) is a powdery substance made from fossilized algae. To a woodlouse, it’s like walking through broken glass. It scratches their exoskeleton and dehydrates them.

Sprinkle a thin, dry layer of DE around plant bases, under pots, and at the edges of garden beds. But—and this is a big but—DE only works when it’s dry. Rain will turn it into mush. Reapply after a storm, and wear a mask when dusting; you don’t want to breathe in microscopic fossils.

Step 5: Bring in the (Accidental) Cavalry

Woodlice have natural enemies. Birds, frogs, toads, and spiders all think woodlice are crispy little snacks. Want to invite them over? Install a tiny birdbath, leave a few flat stones for frogs, and don’t freak out when you see a spiderweb.

You might even attract a hedgehog—they adore woodlice like we adore pizza. To be honest, if you build a small log pile in a quiet corner, you’ll create a five-star diner for these predators. Let nature handle the pest control; it’s been doing it longer than we have.

Step 6: Their One Weakness—Beer?

Okay, this is a little ridiculous, but it works. Bury a shallow container (like a yogurt pot) so the rim is level with the soil. Fill it with beer—any cheap lager will do. Woodlice are oddly attracted to the yeast smell.

They’ll crawl in for a sip, then drown in a boozy stupor. It’s a bit grim, I admit. Empty the trap every morning (glove up again) and refill. Just don’t use your favorite craft IPA; that would be a waste of good beer.

When to Just Relax

Here’s the truth: a few woodlice are actually helpers. They break down dead plant matter and turn it into compost. If you only see a handful under a log, let them be. They’re not eating your live plants—they’re recycling.

The problem starts when their population explodes because your garden is too damp and cluttered. Focus on the environment, not the insects. Change the habitat, and the woodlice will move to a more humid apartment complex down the street.

So, grab a coffee, walk around your garden, and see where the moisture hides. A little sunlight, a little dry dirt, and some strategic potato slices will do the trick. And if all else fails? Start a rumor that woodlice are afraid of bad karaoke. It might not work, but it’ll make you smile while you’re out there with a broom.