Natural prevention works. Sealing gaps, removing food and water, and keeping the kitchen clean are the same first steps a licensed pest controller uses. But once you've got an active ant or cockroach problem, these steps alone won't get rid of it.
Products labelled 'natural' or 'organic' are worth a look, but the label doesn't mean what most people think. And there are five cases where calling a pro makes more sense than trying harder yourself. One involves a common ant type where the wrong DIY move actively makes things worse. This guide covers all of it, grounded in Australian government health guidance.
What does a professional pest control visit cost?
When natural steps don't work, a licensed pest controller can assess and treat the problem in one visit. Cost depends on your property size, pest type, and whether roof voids or subfloors need treatment.
Natural steps that genuinely cut pest pressure
Wanting to avoid harsh chemicals at home is a sound idea. It's also backed by Australian government health advice. Victorian health guidance puts making your home unattractive to pests as the first step in any pest plan betterhealth.vic.gov.auView source .
That means cutting off three things: food, water, and shelter. Remove enough of those and many pests can't keep a colony near your home. These aren't folk tips. They're the same first steps a licensed pest controller will tell you to take, backed by the same government evidence you can look up yourself, and worth doing before you spend a cent on anything else.
Removing food, water and shelter starves a colony before it settles in
Ants follow food. Cleaning up crumbs and food scraps around the house may reduce ant problems health.vic.gov.auView source . Pet food left outside draws them in too . Sealed jars and clean bench tops are your best natural ant steps. Simple, cheap, and no spray needed.
Cockroaches need water every day to stay alive. Removing standing water and fixing leaky taps takes away one of their key needs health.vic.gov.auView source . Add sealed food storage and you've cut two of the three things that keep them coming back. That's a meaningful difference before you spend a cent on any product.
For mosquitoes, draining puddles near your home removes the spots where they breed betterhealth.vic.gov.auView source . It won't wipe out any species on its own. But it pushes the problem away from where you sleep, and it takes about five minutes.
Sealing cracks keeps pests out without any product at all
Exclusion means sealing the cracks and gaps that pests use to get inside. Government health guidance names this as the core natural step for ants and cockroaches betterhealth.vic.gov.auView source health.vic.gov.auView source .
You're not repelling pests with a product. You're physically blocking the routes they rely on to enter. It doesn't wear off over time. It doesn't need reapplying each season. And it raises no product-safety concerns at all. Done well, it's the highest-value thing on this list.
One plant-based spray that's actually registered: pyrethrum
If you want to go beyond prevention and use a product, pyrethrum is the one worth knowing. It comes from the flowers of certain chrysanthemum plants. A licensed pest controller may use it against lice, fleas, silverfish, ants, and cockroaches health.vic.gov.auView source . It's a real spray, not a scent.
Government health guidance places pyrethrins, the active part of pyrethrum, in the low-toxicity class of the four main spray groups health.vic.gov.auView source . They break down fast in light and air. That limits how long they stay active indoors. 'Low toxicity' is still relative, though. Pyrethrins need care around children, pets, and pregnant women.
One more thing: products sold for pest control in Australia generally need to be approved by the APVMA, the national pest chemical regulator, before they can legally be sold health.vic.gov.auView source . A 'natural' label on the box doesn't change that rule.
The four pest spray classes: how they compare
Licensed pest controllers choose from four main spray groups. Government health guidance is clear: always use the lowest-toxicity class that will do the job health.vic.gov.auView source . Here's how pyrethrum sits against the others.
| Class | Toxicity | Stays active in the environment | Notes |
|---|---|---|---|
| Organophosphates | High | High | Highest toxicity; less used in homes today |
| Carbamates | Moderate | Low | Used in some baits and surface sprays |
| Pyrethrins (natural) | Low | Low | Plant extract; breaks down quickly in light and air |
| Synthetic pyrethroids | Low (for mammals) | Low to moderate | Synthetic version; longer-lasting than natural pyrethrins |
Source: Victorian Department of Health (health.vic.gov.au). All classes need APVMA registration when sold as pest control products in Australia.
The 'natural' label on pest products doesn't mean what you think
Here's the catch. 'Natural', 'organic', and 'chemical-free' are marketing words. They're not a legal class in Australia. Pest control products generally need to be approved by the APVMA before they can be sold, whether the active part comes from a plant or a lab health.vic.gov.auView source .
What does that mean in practice? A 'natural' product might be fully approved, with a label showing re-entry times and first-aid steps. Or it might not be approved at all. You can check a product's APVMA number before you buy. That tells you whether its safety claims have been assessed by the regulator.
This isn't a reason to avoid plant-based products. It's a reason to read the label as carefully as you'd read any other pest product.
Folk remedies have limited evidence, so don't stake an active problem on them
Essential oils, white vinegar, diatomaceous earth, coffee grounds. These come up in almost every online search for natural pest control. They're worth a direct answer.
There's limited verified evidence in Australian government sources for these methods on home pests. That doesn't prove they don't work at all. What it means is that if you're relying on them to fix an active pest problem, you're doing so without a solid evidence base. That's a risk when a colony is already in place and growing. Trying them alongside the prevention steps above is fair. But if things are getting worse, stop waiting.
When prevention isn't enough: five signs it's time to call a licensed pest controller
Natural steps work best before a colony gets set up. Once it has, the picture changes. Here are the five cases where a professional is the right call.
You can't find the nest
Treating the nest directly is the most effective ant control step health.vic.gov.auView source . No nest, no target. Surface sprays and traps can cut the number of ants you see. But they don't reach the colony, and the colony keeps making more workers to replace the ones you've removed. A licensed pest controller can find hidden nests and treat the source.
You've identified (or suspect) Pharaoh ants
This one matters. Pharaoh ants must not be sprayed. Spraying causes the colony to split into new groups that spread further through your home health.vic.gov.auView source . The problem doesn't shrink. It multiplies.
Pharaoh ants are small and pale, often found in kitchens and bathrooms. If you don't know which ant type you're dealing with, a licensed pest controller can tell you before any treatment goes on. Getting the species right isn't optional here.
Hygiene is already good, but the pest keeps coming back
Government health guidance notes that chemical control can be limited by poor hygiene health.vic.gov.auView source . Flip that around. If your hygiene is already good and the pest is still there, hygiene isn't the problem. A licensed pest controller can move to targeted treatment using products you can't buy over the counter, applied in the exact spots where the pest hides. That's the next layer. It's not one you can easily reach yourself.
The pest is in roof voids, subfloors, or wall cavities
Treating pests in cracks, voids, and hidden spots requires access most homeowners don't have health.vic.gov.auView source . Roof voids, subfloors, and wall cavities need special tools, and for some pest types, licensed chemicals. A licensed pest controller will price this as its own job, often at a different rate from a standard home visit .
Vulnerable people are in the household
If you're pregnant, or if you've got young children, infants, or older people at home, the product choice matters more health.vic.gov.auView source . A licensed pest controller can pick the lowest-toxicity approved product for your situation, apply it correctly, and tell you when it's safe to go back in. That's a more reliable path than working through the options yourself without knowing which products are approved for indoor home use.
Safety steps that apply every time you use a pest spray
Whether it's a pyrethrum spray or any other product, these three steps apply every time health.vic.gov.auView source betterhealth.vic.gov.auView source :
Wait before you go back in. Government health guidance gives a re-entry time of around four to six hours after an indoor spray, or until the product is dry health.vic.gov.auView source . Don't rush it.
Move pets out before you treat, and keep them out until the product is dry health.vic.gov.auView source . Pets groom surfaces and can pick up residue at floor level.
If you're worried about exposure, call the Poisons Information Centre on 13 11 26. It's a national number, open all day and all night betterhealth.vic.gov.auView source .
Frequently asked questions about natural pest control
Prevention-based natural steps (removing food and water, sealing entry points, cleaning up) genuinely reduce pest pressure. They're backed by government health guidance and they work best before a colony is set up. Once it is, natural steps alone are unlikely to clear it. A licensed pest controller is the right next step at that point.
The evidence points most strongly to three steps used together: remove food residues, cut off water sources (cockroaches need water daily; mosquitoes breed in standing water), and seal cracks and entry points. No single product or remedy covers all pests as well as this combination does.
The label 'natural' doesn't guarantee safety. Pyrethrum, the main plant-based approved pest spray, is lower toxicity than most options but still needs care around children, pets, and pregnant women. Products sold for pest control in Australia generally need APVMA approval regardless of what they're made from. Read the label, follow the re-entry time, and if you're unsure, a licensed pest controller can advise on the safest approved product for your home.
For ants, the top natural steps are: remove food scraps, keep pet food inside, use airtight containers, fix leaky taps, and seal cracks. These may reduce ant problems but don't guarantee the colony will leave. If ants keep coming back despite good hygiene, or you can't find the nest, a licensed pest controller can target the colony at the source.
There are two main types. Prevention steps (hygiene, water removal, sealing entry points) use no product at all. Plant-based products like pyrethrum are natural-origin sprays that still need APVMA approval in Australia. Folk methods like essential oils and vinegar are widely discussed online but have limited verified evidence in government sources for use on home pests.
Government guidance says to always use the lowest-toxicity class that will solve the problem. For a licensed pest controller, that usually means starting with pyrethrins (natural, low toxicity, breaks down fast) or synthetic pyrethroids before moving to higher-toxicity options. The right choice depends on the pest type, where it is, and who's in the home.
For prevention, yes. Hygiene, water removal, and exclusion are exactly what a professional will tell you to do. For active pest problems, particularly in hidden areas like roof voids or subfloors, or when you need to identify the pest before treating it, professional pest control gives you the right products, the right equipment, and a correctly named target. See our complete pest control guide for the full picture.
Call one if: you can't find the nest; you suspect Pharaoh ants (spraying makes them spread); your hygiene is already good but the pest won't leave; the problem is in roof voids, subfloors, or wall cavities; or you've got vulnerable people at home and want an expert to choose the safest product. Any one of these five situations tips the balance toward professional treatment.
Ready to get quotes, or just want to know what a professional visit costs before you call anyone? See what a professional pest control visit costs for a breakdown by job type.
Not sure which pests you're dealing with, or how far the problem has spread?
Natural prevention is worth trying first. But when it's not enough, a licensed pest controller can find the nest, identify the species, and apply the right registered treatment for your home. You'll know what you're dealing with before any work starts.
Sources
This guide is general information; it's not a substitute for advice from a licensed pest controller. If you're concerned about exposure to a pest control product, call the Poisons Information Centre on 13 11 26.
- betterhealth.vic.gov.auView source
- health.vic.gov.auView source
- health.vic.gov.auView source
- health.vic.gov.auView source
- health.vic.gov.auView source