If you have ever opened a kitchen cabinet and found a line of ants marching toward the sugar jar, you already know the question: how to do pest control at home without filling your house with harsh chemicals? The good news is that you do not need to start with a spray can. Most household pest problems can be reduced with simple, low-toxicity steps that focus on removing what pests want: food, water, shelter and an easy way in.
Seal Entry Points and Cut Off Food and Water
This is the most effective “natural remedy” on the list, and it costs almost nothing. Pests do not appear by magic. They come in through gaps and stay because something in your home is feeding them.
Home pest-proofing guidance from the extension network recommends sealing utility openings where pipes and wires enter the house, fitting door sweeps so no light shows under exterior doors, and keeping up daily sanitation: vacuum crumbs, do not leave dirty dishes out overnight, and clean pet food bowls (Pests in the Home, eXtension; home sealing guidance).
An older U.S. EPA pesticide-program bulletin adds practical tips: caulk windows, install door sweeps if you can see daylight around a door, rake debris away from the foundation, and fill small gaps with steel wool to keep mice out, since they can squeeze through very small openings (U.S. EPA archive).
Quick checklist:
- Store dry food in sealed containers and put pet food away overnight.
- Fix leaking taps and wipe sinks dry before bed.
- Take out the trash regularly and use bins with tight lids.
- Seal cracks around baseboards, pipes and windows.
- Keep stored boxes and clutter to a minimum so you can spot pests early.
Diatomaceous Earth (Pest-Grade)
Diatomaceous earth (DE) is a fine powder made from the fossilised remains of tiny aquatic organisms called diatoms. According to the National Pesticide Information Center (NPIC), DE products were first registered as pesticides in 1960 to control insects and mites, and DE is used against pests such as fleas, ticks and spiders (NPIC Diatomaceous Earth Fact Sheet).
How to use it: Apply a very thin, barely visible layer in dry spots where pests travel, such as under appliances, along baseboards and behind cabinets. A thick pile is less effective because insects simply avoid it.
Safety notes:
- NPIC points out that “food grade” and pest-control DE are not the same thing. Food-grade labels carry no pest-control instructions or precautions, so choose a product labelled for pest control and follow its directions (NPIC PestiBytes, Episode 26).
- Extension specialists note the dust can irritate lungs, skin and eyes if misapplied, so wear a mask and apply it carefully (Ask Extension).
- It can also harm beneficial insects, so keep it away from garden areas where pollinators visit.
Peppermint and Other Essential Oil Barriers
Plant oils are popular for a reason: they smell pleasant to people and unpleasant to many insects. Cornell’s Integrated Pest Management Program explains that the U.S. EPA treats certain low-risk ingredients as “minimum risk pesticides,” meaning the risk to the public and environment is low enough that full registration is not required (Cornell IPM Program). Peppermint oil, cedar oil, cinnamon oil, clove oil, citronella and lemongrass oil are among the active ingredients allowed in these products (Colorado Environmental Pesticide Education Program, Fact Sheet #139).
How to use it: Mix about 10 to 15 drops of peppermint oil in a spray bottle with water and a small squirt of dish soap, shake well, and wipe it along window sills, door frames and ant trails. Reapply every few days because the scent fades.
Be realistic: Essential oils work mainly as repellents. They can push ants and spiders away from a doorway, but they will not wipe out a nest. Also keep in mind that some essential oils can be harmful to pets, especially cats, so check with your vet before diffusing or spraying them around animals.
Boric Acid Bait for Ants and Cockroaches
Boric acid is a mineral-based, low-toxicity option that has been used in homes for decades. A pediatric environmental health guide recommends trying baits or less-toxic agents such as boric acid before stronger pesticides, while keeping baits and traps out of children’s reach (Pediatric Environmental Health Specialty Units, “Pests in Your Home”).
How to use it: Mix a small amount of boric acid with something sweet (for sugar-loving ants) or a little peanut butter (for roaches). Place the bait on a piece of cardboard or inside a sealed bait station where pests travel, never on open surfaces.
Important: NPIC warns that borax and boric acid can be harmful if swallowed, particularly for young children and pets (NPIC Boric Acid Fact Sheet). Poison control guidance also advises keeping borates away from children and pets and wearing gloves and a mask when applying them (Poison Control). If you have toddlers or curious pets, skip this remedy and stick with remedies 1 to 3 and 5.
Vacuum, Swat and Trap
It sounds almost too simple, but physical removal is a legitimate pest-control method. Extension guidance notes that once your home is properly sealed, the occasional ant, roach or fly that gets in can be dealt with using a fly swatter, vacuum cleaner or broom, with no pesticide needed (Pests in the Home, eXtension).
- Vacuum visible ants, roaches, spiders and webs, then empty the vacuum bag or canister outside right away.
- Sticky traps placed along walls and behind appliances help you see where pests are active, so you know where to seal or clean.
- Snap traps are a quick, chemical-free choice for mice. Place them against walls where droppings or gnaw marks appear.
A Simple Weekly Routine: How to Do Pest Control at Home
- Inspect: Check under sinks, behind the fridge and along baseboards for droppings, trails or damage.
- Clean: Wipe counters, sweep, vacuum and take out the trash.
- Seal: Fix one gap or leak each week until the house is tight.
- Treat: Use a light dusting of DE or a peppermint spray in trouble spots.
- Monitor: Replace sticky traps and watch for new activity.
When Natural Remedies Are Not Enough
Natural methods work best for small, early problems. Call a licensed professional if you see signs of termites, a rodent infestation, bed bugs, or a pest population that keeps coming back despite good sanitation. Whatever you choose, read the label of any product you buy and follow it exactly. If someone swallows a product by accident, call your local poison control centre right away.
Frequently Asked Questions
What is the best way to do pest control at home naturally?
Start with prevention: seal entry points, store food in sealed containers, fix leaks and keep your home clean. Then add targeted tools such as pest-grade diatomaceous earth or peppermint oil sprays where you see activity.
Is diatomaceous earth safe around pets and kids?
Pest-control DE is considered low in toxicity when used according to its label, but the dust can irritate eyes, skin and lungs. Wear a mask, apply a thin layer and keep it away from areas where children and pets play.
Do essential oils really kill pests?
Mostly they repel rather than kill. They are useful as a barrier at doors and windows but are not a replacement for sealing, cleaning and baiting a real infestation.
Is boric acid safe to use at home?
It is lower in toxicity than many conventional insecticides, but it can be harmful if swallowed. Use it only in sealed bait stations or hidden spots out of reach, and avoid it entirely if small children or pets could get to it.
Final Thoughts
Learning how to do pest control at home does not require expensive treatments or strong chemicals. Seal the gaps, remove the food and water, use gentle barriers like diatomaceous earth and peppermint oil with care, and rely on traps and the vacuum for the stragglers. Stay consistent and your home will become a place pests simply do not want to live.
