
Rats are a common problem in Australian gardens, where they can spread disease and damage property. They are attracted to gardens by the availability of food, water, warmth and shelter. To deter rats from your garden, you can use traps, poison or natural methods such as peppermint oil, which rats hate the smell of. You can also make your garden less appealing to rats by keeping it clean and tidy, removing clutter and potential food sources, and sealing any holes or gaps that rats could use to enter your home.
| Characteristics | Values |
|---|---|
| Smells they dislike | Peppermint oil, catnip, mint |
| Traps | Nooski rat traps, humane traps, DIY mouse traps, cages |
| Baits | Peanut butter, cheese, bread, meat, vegetables, bacon |
| Repellents | Electronic rodent repellers, natural repellents, cotton wool balls soaked in peppermint oil |
| Garden maintenance | Keep the garden clean and tidy, remove piles of wood, pick up fallen fruit, cut back overgrown areas, seal rubbish in bins, cover uncovered drains with wire mesh, block holes in walls, floors and doors, stack firewood off the ground, mow the lawn |
| Compost bins | Keep compost bin moist, don't add meat, dairy or cooked food scraps, turn the heap regularly, fix chicken wire around the base of the bin |
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What You'll Learn

Seal entry points and remove attractants
Rats can be a persistent problem in gardens, but there are several ways to deter them. Firstly, identify where the rats are living and the routes they take to access your garden. Rats are attracted to food, water, warmth, and nesting opportunities, so it is important to remove these attractants.
To start, remove any fallen fruit, berries, or vegetables from your garden, as well as any unharvested crops. Keep your compost bin uninviting by avoiding the addition of meat, dairy, or cooked food scraps. Instead, keep it moist by adding green and brown materials and watering it regularly. Rats can also be attracted to pet food and waste, so ensure that you scoop your pet's waste as soon as possible and clean animal cages frequently. Keep rubbish in sealed containers with secure lids, and regularly clear out sheds and storage areas to reduce clutter and potential nesting sites. Stack firewood and bricks off the ground to further minimise nesting opportunities.
In addition to removing attractants, it is crucial to seal entry points to prevent rats from accessing your garden. Rats can squeeze through small gaps and holes, so cover any cracks, crevices, or holes in homes, buildings, garden sheds, and outdoor areas. Use an appropriate sealant to block any openings, and consider adding a metal 'kick plate' to your shed door. If you have any uncovered drains, cover them with wire mesh to prevent rats from using them as an entry point.
By removing attractants and sealing entry points, you can effectively deter rats from your garden and create an inhospitable environment for these unwanted visitors.
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Use peppermint oil, catnip, or mint plants
Rats are highly sensitive animals that can be deterred by strong scents. Peppermint oil, catnip, and mint plants all have strong aromas that rats tend to dislike.
Peppermint oil, in particular, has a distinct freshness that rats despise. Pure and natural peppermint oils with strong, clear scents will work best as their aroma will carry for longer. You can spray peppermint oil on areas where you have noticed rat activity or sprinkle some on your rubbish bags to prevent them from being ransacked. It is recommended to reapply the oil twice a week.
Catnip is another plant with a strong smell that rats are thought to avoid. Some people have tried planting catnip seeds around rat holes in their gardens, hoping that the neighbourhood cats will be attracted by the catnip and scare away the rats. However, it is worth noting that catnip may simply attract cats to your garden, and they may not effectively scare away the rats.
Mint plants, particularly peppermint, are also believed to be effective at deterring rats. Plants with potent aromas can be highly effective at deterring unwanted pests.
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Set traps and use bait
Rats are intelligent animals and are considered vermin as they can spread serious diseases. They can set up homes beneath decking, in sheds, compost bins, and greenhouses. Rats are mostly nocturnal, so you may not see them, but you can identify them through their greasy tracks, cylindrical droppings, and gnawed wood or plastic.
Trapping and poisoning are two common solutions to get rid of rats. However, poisons can harm other wildlife and get into the wider environment. Therefore, it is better and safer to contact your local council or a professional pest controller.
If you decide to set traps, it is important to use them correctly and read the labels. You can purchase humane traps from garden centres, hardware stores, or online. These traps are designed to catch rats without harming them and have a mechanism to prevent other animals from being caught. However, you will need to decide how to release the rats away from your home and garden.
When using traps, it is crucial to determine whether you are dealing with rats or mice, as rat traps need to be much larger than mouse traps. Rats instinctively use walls and fences as guides, so place the traps along walls and in low-light settings. They are most effective when hidden along paths that rats are likely to travel, such as inside closets and under furniture along walls.
To increase the effectiveness of traps, use bait with strong smells such as nuts, fish, or mouldy cheese. Peanut butter is also a popular option, especially for black rats that find it irresistible. For brown rats, smelly cheese can be a good choice. Keep the bait small and centred on the trap to ensure the rat cannot grab it without triggering the trap.
You can also get creative with your trap setup. Try cutting holes on each side of a shoebox, placing it along a suspected rat path, and putting a baited trap inside. The box will pique the rat's curiosity, and they will be trapped once they enter.
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Get a cat
Cats are an effective way to deter rats from your garden. Cats have been used as rat catchers for centuries, even protecting the prime minister at 10 Downing Street. They are considered the "ultimate weapon in public health".
Cats mark their territory by rubbing up against things, and this scent alone can make rats scatter. Cats will also kill rats, and the pheromones released by the cats will cause the remaining rat population to flee the area.
If you are considering getting a cat to deal with a rat problem, it is important to be aware of the risks of secondary poisoning. If you are using poison to kill rats, there is a risk that cats can become poisoned by eating the rats. This is dangerous for the cats and can also harm other wildlife in your garden and the wider environment.
Cats can be an effective solution to a rat problem, but they may not be suitable for everyone. If you are unable or unwilling to get a cat, there are other methods you can use to deter rats from your garden.
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Use electronic rodent repellers
Electronic rodent repellers are a great way to deter rats from your garden without having to resort to traps or poison. These devices are plugged into a power outlet and emit high-frequency ultrasonic, electromagnetic, or subsonic sounds that are disruptive to rodents. The sound causes a physiological response in the rodents, preventing them from gathering food, breeding, building nests, or communicating, and eventually causing them to flee.
One such device is the RATSAK Repel Ultrasonic Rodent Repeller Mini, which is ideal for medium-sized indoor rooms. It emits high-frequency airwaves to repel rodents and is safe for humans and pets. However, it should not be used near rodent pets or in areas with flammable vapors or explosive dust.
Another option is to use the RATSAK Repel Rodent Repellent Gel, which is designed for outdoor areas. The gel contains natural ingredients such as garlic oil and white pepper, which deter rats by creating an unpleasant sensation on their feet and face.
You can also find electronic rodent repellers that use electromagnetic or ionic technologies, such as those offered by Pestrol Australia. These devices are humane and chemical-free and are completely undetectable by humans.
It is important to note that some users have reported issues with ultrasonic pest repellers, including interference with telephone conversations, burglar alarm systems, and hearing aids. There are also concerns about the potential distress these devices may cause to rabbits and rodent pets. Therefore, it is recommended to research specific brands and their scientific backing before purchasing an ultrasonic pest repeller.
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