There is nothing quite like spending time in the garden when everything is growing well. Whether you have a large garden, a small patio filled with pots or just a few plants on a balcony, growing your own flowers, fruit and vegetables can be incredibly rewarding.
Unfortunately, gardens don’t just attract people. They can also become home to all sorts of unwanted visitors.
From aphids covering your favourite plants to slugs eating their way through newly planted seedlings, garden pests can quickly turn a healthy garden into a frustrating one. The good news is that you don’t necessarily need to reach for strong chemicals or call in a professional every time you spot a pest.
With a few preventive measures and simple DIY pest-control methods, you can protect your plants and make your garden less attractive to unwanted pests.
What Are the Most Common Garden Pests?
Before deciding how to deal with a pest problem, identify exactly what you are dealing with. Different pests affect plants in different ways, and a solution that works for one may not work for another.
Some of the most common garden pests include:
Slugs and snails
Slugs and snails are particularly troublesome in vegetable gardens and flower beds. They are attracted to tender young plants and can cause significant damage overnight.
You may notice holes in leaves, damaged seedlings or the tell-tale trail of slime across your plants.
Aphids
Aphids are tiny insects that feed on plant sap. You can often find them clustered around new growth, stems, and the underside of leaves.
Although a few aphids may not cause serious problems, larger infestations can weaken plants and affect their growth.
Ants
Ants aren’t usually responsible for direct plant damage, but they can become a nuisance in gardens. They are also attracted to the sugary honeydew produced by aphids, so a sudden increase in ants around your plants can sometimes indicate an aphid problem.
Caterpillars
Caterpillars can cause surprisingly large amounts of damage in a short period of time. Look for holes in leaves, chewed edges and droppings on or underneath plants.
Whiteflies
These tiny flying insects are often found underneath leaves. Like aphids, they feed on plant sap and can weaken plants when present in large numbers.
Vine weevils
Vine weevils can be particularly problematic for container plants. The adults eat the edges of leaves, while their larvae feed on plant roots.
Mice and other rodents
Gardens can also attract rodents, particularly if there are accessible food sources such as birdseed, compost or fallen fruit.
Keeping the garden tidy and removing potential food sources can make your outdoor space less appealing.
Prevention Is the Best Form of Garden Pest Control
One of the easiest ways to deal with garden pests is to make your garden less attractive to them in the first place.
Good garden maintenance can go a surprisingly long way.
Keep your garden tidy
Remove dead leaves, fallen fruit and other garden debris regularly. Pests can use piles of organic material as places to hide or breed.
This doesn’t mean your garden needs to be perfectly neat. In fact, leaving some areas wild can benefit biodiversity. The key is to keep pest-prone areas from becoming unnecessarily damp and overcrowded.
Don’t overwater
Excessively damp conditions can encourage some pests, particularly slugs and snails.
Water plants when they need it rather than automatically watering every day, and make sure containers have adequate drainage.
Check plants regularly
Get into the habit of looking closely at your plants.
Check underneath leaves, around new growth and along stems. Catching a small infestation early is much easier than dealing with a major one later.
Quarantine new plants
If you buy plants from a garden centre or bring plants home from elsewhere, give them a quick inspection before placing them among your existing plants.
Look for insects, eggs, damaged leaves or other signs of disease or infestation.
Keeping new plants separate for a short period can help prevent unwanted pests from spreading throughout your garden.
Encourage Beneficial Garden Wildlife
Not every insect in your garden is a pest.
In fact, encouraging beneficial insects and other wildlife can be one of the most effective forms of natural pest control.
Ladybirds, lacewings and hoverfly larvae, for example, can all help keep aphid populations under control.
Birds can also eat a wide range of garden insects and caterpillars.
Planting flowers that provide food for pollinators, leaving some areas of the garden undisturbed and providing suitable habitats can help create a healthier ecosystem.
This is particularly useful if you’re gardening with children, as it gives them an opportunity to learn about the different creatures that live in the garden and the important roles they play.
Try Natural Pest Control Methods
If you discover a small number of pests, you may be able to deal with them without using commercial pesticides.
For example, you can sometimes remove aphids by gently spraying plants with water or wiping them from leaves and stems.
You can often pick larger caterpillars off plants by hand, and remove slugs and snails manually, especially in the evening when they are more active.
You can also use physical barriers to protect vulnerable plants.
Fine mesh or netting can prevent certain insects from reaching crops, while plant collars and other barriers can help protect young plants from crawling pests.
Natural pest control isn’t always about finding a single product that kills a pest. Sometimes the best approach is to make it more difficult for the pest to reach the plant in the first place.
DIY Pest Control Products for the Garden
Sometimes prevention and natural methods aren’t enough, particularly if you’re dealing with a persistent infestation.
A variety of DIY pest control products are available for dealing with common household and garden pests. Depending on the problem, these can include traps, barriers, insect controls and other products designed to target specific pests.
When choosing a product, identify the pest first and check that the product suits the intended use.
Also follow the manufacturer’s instructions carefully. Using more of a product than recommended won’t necessarily make it more effective and could harm plants, wildlife, or the surrounding environment.
If you have children or pets, take particular care when storing and using any pest-control products.
How to Get Rid of Slugs and Snails
Slugs and snails are among the most frustrating pests for gardeners, especially when you’re trying to grow young plants.
Several ways can reduce the damage they cause.
Watering plants in the morning rather than late in the evening can make the garden less attractive overnight, while removing hiding places such as piles of damp debris can also help.
Physical barriers can protect particularly vulnerable plants.
It is also worth remembering that slugs and snails form part of the garden ecosystem, so the aim doesn’t necessarily need to be to remove every single one. Concentrating your efforts on protecting your most vulnerable plants can be a more balanced approach.
How to Deal with Aphids
Aphids can appear seemingly overnight, particularly on fresh new growth.
If you spot a small colony, try removing them by hand or gently washing them from the plant with water.
Encouraging natural predators can also help. Ladybirds, lacewings and hoverfly larvae all feed on aphids, making them valuable visitors to the garden.
Avoid automatically treating every aphid you see. A small population may attract beneficial insects that will help control the problem naturally.
How to Keep Pests Away from Your Vegetable Garden
Growing your own vegetables is rewarding, but edible crops can be particularly attractive to pests.
One of the simplest ways to protect them is to inspect plants regularly and deal with problems before they become established.
Crop rotation can also help reduce the likelihood of certain pests becoming a recurring problem, while netting and other physical barriers can protect vulnerable crops.
Keeping weeds under control can help too, as weeds can provide shelter and food for some pests.
Good spacing between plants is another useful habit. Overcrowded plants have less airflow and can create a humid environment where pests and plant diseases can thrive.
Don’t Forget About Pests Inside the Home
Garden pest control isn’t just about protecting plants.
During certain times of the year, insects and rodents can also find their way into homes. Open doors and windows, gaps around pipes and other small openings can provide easy entry points.
Keeping food sealed, cleaning up crumbs, and dealing with rubbish promptly can reduce what attracts unwanted visitors.
If you notice signs of rodents or a significant insect infestation inside your home, deal with the problem promptly rather than allowing it to become established.
Are Chemical Pesticides Always Necessary?
Not necessarily.
For a small garden pest problem, prevention, physical removal, barriers and natural pest-control methods may be enough.
However, a suitable commercial product can be useful in some situations, particularly when you’re dealing with a persistent or widespread infestation.
The important thing is to use the right product for the right pest and follow the instructions carefully.
There’s also no reason to treat an entire garden simply because you’ve spotted a single insect. Identifying the problem first allows you to choose a more targeted approach and avoid unnecessarily affecting beneficial insects and other wildlife.
Make Your Garden Less Attractive to Rodents
Rodents such as mice and rats are opportunistic, so removing easy food sources can make a difference.
If you feed garden birds, avoid leaving large amounts of seed scattered across the ground. Store bird food in secure containers and clean up spilt food regularly.
Keep rubbish bins securely closed and avoid leaving food waste accessible.
Manage compost bins properly, and collect fallen fruit rather than leaving it to rot on the ground.
Finally, keeping areas around sheds and outbuildings reasonably clear can remove potential hiding places.
A Simple Garden Pest-Control Routine
You don’t need to spend hours inspecting your garden every week.
A quick routine can help you spot problems early:
Once or twice a week:
- Check the underside of leaves for insects or eggs.
- Look for holes or unusual damage.
- Inspect new plant growth.
- Check around the base of plants for slugs and snails.
- Remove damaged or diseased leaves.
- Pick up fallen fruit.
- Check containers and sheltered areas for signs of pests.
- Make sure food sources such as birdseed are stored securely.
The earlier you notice a problem, the more options you have for dealing with it.
Should You Use DIY Pest Control or Call a Professional?
For many minor garden problems, DIY pest control can be perfectly adequate.
If you’ve spotted a few aphids, some slugs eating your lettuce or caterpillars on your brassicas, there are plenty of simple things you can try yourself.
However, professional help may be more appropriate if you’re dealing with a significant infestation, particularly with rodents or pests inside the home.
You should also consider professional advice if you’ve tried several appropriate methods without success or you’re unsure what type of pest you’re dealing with.
