The Top Ten Companion Plants for Pest Control

Hey there fellow gardeners!

As an eclectic master gardener, I’m always on the lookout for ways to keep my garden healthy and thriving without resorting to harmful pesticides.

And one of the best ways to do that is by planting companion plants for pest control.

Companion planting is all about pairing plants that have a mutually beneficial relationship.

By strategically placing certain plants together, you can naturally repel pests and promote growth and health in your garden.

So, without further ado, here are my top ten favorite companion plants for pest control – guaranteed to keep your garden looking great all season long!


Marigolds are one of the most popular companion plants in the garden. Not only do they add a pop of color to your landscape, but they also help control pests. These beautiful flowers contain a compound called thiophene, which is toxic to many insects.

Planting marigolds throughout your garden can help repel various types of pests such as aphids, whiteflies, and nematodes. They also attract beneficial insects like ladybugs and lacewings that feed on harmful pests.

In addition to their pest control abilities, marigolds are incredibly easy to grow. They thrive in full sun and well-drained soil, and they don’t require much maintenance.

With so many benefits, it’s no wonder that marigolds have become a staple in any organic gardener’s repertoire.


Nasturtiums are definitely a gardener’s best friend – they’re beautiful, easy to grow, and provide natural pest control for other plants. Plus, they’re very low-maintenance.

To get started, just plant them in a sunny spot with well-draining soil. Once they’re established, they’ll thrive with minimal care and attention.

When companion planting with nasturtiums, it’s best to stick to other pest-resistant plants like calendula, marigolds, and cosmos. These flowers can help keep harmful bugs away from your other plants, and they look beautiful together.

All in all, nasturtiums are a great addition to any garden.

Benefits Of Nasturtiums

Are you tired of pests ruining your garden? Look no further than the humble nasturtium.

As an eclectic master gardener, I highly recommend planting these cheerful flowers as a companion plant to ward off unwanted insects and critters.

Not only do nasturtiums repel pests with their pungent scent, but they also attract beneficial insects like ladybugs and hoverflies which prey on aphids and other destructive bugs.

Plus, their vibrant blooms add a pop of color to any garden bed or container.

But that’s not all – nasturtiums are also edible! Their leaves and flowers have a peppery taste that can spice up salads or be used as a garnish.

So not only do they protect your other plants from harm, but they also provide a tasty addition to your meals.

Give them a try in your garden this season.

Growing Nasturtiums

Now that you know the benefits of planting nasturtiums in your garden, it’s time to learn how to grow them.

These hardy annuals are easy to cultivate and will thrive in various soil types as long as they receive full sun or partial shade.

To start, plant nasturtium seeds after the last frost date in your area.

Sow them directly into the soil about an inch deep and 10 to 12 inches apart.

If you prefer to grow them in containers, make sure each pot is at least six inches wide.

Water your nasturtiums regularly but be careful not to overwater them as they can develop root rot.

Fertilizing isn’t necessary, but you can add a balanced fertilizer every four weeks if desired.

Once your nasturtiums bloom, deadhead the spent flowers regularly to encourage more blooms.

You can also pinch back the top of the plant when it reaches six inches tall to promote bushier growth.

In conclusion, growing nasturtiums is a breeze and reaps many rewards for both gardener and garden alike.

Give these versatile plants a try this season and watch them brighten up your space while keeping pests at bay.

Companion Planting With Nasturtiums

Now that we know how to grow nasturtiums, let’s explore the benefits of companion planting with these lovely flowers.

Nasturtiums are not only beautiful but also highly functional in the garden. They work as natural pest repellents and can help improve the health and yield of neighboring plants.

Nasturtiums attract aphids and other pests away from vegetables like tomatoes, cucumbers, and beans. Additionally, their pungent scent repels squash bugs, whiteflies, and cucumber beetles. Planting nasturtiums near these crops can help protect them from infestations without resorting to harmful pesticides.

The leaves of nasturtiums also contain high levels of sulfur which can improve the flavor and growth of brassica crops like cabbage and broccoli.

Furthermore, planting nasturtiums near fruit trees can help prevent apple scab by attracting beneficial insects that eat the disease-causing fungi.

In essence, companion planting with nasturtiums is an easy way to promote a healthy ecosystem in your garden while adding vibrant color to your landscape.


Basil is an excellent companion plant for pest control. Its pungent smell can repel mosquitoes, flies, and other insects. It also attracts beneficial insects like bees and butterflies, which can help pollinate other plants in your garden. Basil is easy to grow and can be planted near tomatoes, peppers, and eggplants to deter pests that commonly attack these plants.

Aside from its pest-repelling properties, basil is also a versatile herb that can be used in many dishes. Its leaves can be added to salads, soups, pasta sauces, or used as a garnish for pizza. Basil oil is also popular for use in aromatherapy and natural health remedies.

To maximize the benefits of basil as a companion plant, make sure to plant it in well-drained soil with plenty of sunlight. Water it regularly but avoid overwatering as this can lead to root rot.

Harvest the leaves often to promote new growth and keep the plant healthy. With proper care, basil can provide both pest control and culinary enjoyment all season long.


Is lavender really an effective companion plant for pest control? Some gardeners swear by it, while others remain skeptical. Let’s take a closer look at the evidence.

Firstly, lavender is known to attract beneficial insects such as ladybugs and lacewings, which feed on aphids and other pests. This can help reduce the number of harmful insects in your garden without resorting to chemical pesticides.

Secondly, lavender has natural insect-repellent properties. Its strong scent is known to deter mosquitoes, flies, and moths. Planting it near vegetables or fruits can protect them from these pests and prevent damage to your crops.

Thirdly, lavender has a long history of use in herbal remedies for its antiseptic and antibacterial properties. This means that it may also help protect your plants from diseases caused by bacteria or fungi.

So there you have it – three reasons why lavender can be an excellent companion plant for pest control. Consider adding this fragrant herb to your garden if you want to attract beneficial insects, repel harmful ones, and boost the health of your plants naturally.


Moving on from the calming fragrance of lavender, we come to another powerful ally in the garden: mint. This herb has long been celebrated for its fresh scent and culinary uses, but it also has a secret weapon – it repels a variety of pests! Mint is particularly effective against ants, flies, and mosquitoes, making it an excellent addition to any outdoor living space.

One of the reasons mint is so effective at pest control is due to its strong essential oils. These oils are known to repel insects and can even kill them upon contact. Additionally, planting mint near other susceptible plants can help protect them from infestations. Some popular companion plants for mint include tomatoes, peppers, and cabbage.

To fully harness the power of mint in your garden, consider using it in combination with other pest-repelling herbs and flowers. Below is a helpful table outlining some of the top companion plants for pest control:

Plant Pest Repelled
——- —————
Marigold Nematodes
Chives Japanese beetles
Basil Flies
Rosemary Mosquitoes
Petunias Tomato hornworms
Thyme Cabbage worms

By incorporating these plants into your garden design, you can create a natural defense system against common pests. Remember that diversity is key when it comes to both plant selection and placement – aim for a mix of colors, textures, and heights to create an ecosystem that supports beneficial insects as well as repelling harmful ones.

With these tips in mind, you’ll be well on your way to creating a thriving and pest-free garden oasis. Happy planting!


As an eclectic master gardener, I can attest that companion planting is a crucial aspect of organic pest control.

The top ten companion plants for pest control include marigolds, which not only repel pests but also attract beneficial insects.

Nasturtiums are another great option as they deter aphids and whiteflies while adding color to your garden.

Basil is a versatile herb that not only improves the taste of your meals but also repels mosquitoes and flies.

Lavender is a beautiful addition to any garden and effectively repels moths, fleas, and other pests.

Lastly, mint is a must-have plant as it helps keep ants, aphids, and flea beetles at bay while adding a refreshing scent to your garden.

By incorporating these companion plants into your garden, you can achieve effective pest control without the use of harmful chemicals.