Using Companion Flowers for Tomato Pest Control: A Green Thumb Guide

Are you tired of battling pests on your tomato plants using chemical sprays? Fortunately, there’s a natural and organic alternative that can improve your harvest while making your garden more beautiful. Using companion flowers for tomato pest control is a simple and effective approach to keep pests at bay while attracting beneficial insects to your garden. In this guide, we’ll explore everything you need to know about companion flowers and how to use them to protect your precious tomatoes.

Understanding Companion Planting

If you’re looking for natural ways to control pests on your tomato plants, companion planting is an effective solution. Companion planting involves growing certain plants together to provide mutual benefits, such as pest control or improved soil health. When it comes to using companion plants for tomato pest control, there are certain flowers that are particularly effective.

What is Companion Planting?

Companion planting is a gardening technique that involves planting different crops and plants together to enhance their growth and health. By planting certain plants together, you can optimize soil health, reduce pests and diseases, and increase yields. Companion planting can also help to attract beneficial insects and pollinators, such as bees and butterflies.

Using companion planting for tomato pests is a great way to protect your plants from harmful insects, while also improving your garden’s overall health. By planting specific flowers alongside your tomato plants, you can create a natural barrier against pests, while also attracting beneficial organisms that can help your tomatoes thrive.

Choosing Beneficial Flowers for Tomato Plants

Companion planting is a natural and effective way to control pests in your tomato garden. By choosing the right flowers to plant alongside your tomato plants, you can attract beneficial insects and repel harmful pests.

Here are some of the most popular flowers to consider for companion planting with your tomato plants:

Flower Benefit
Marigolds Repel nematodes, whiteflies, and aphids
Basil Repels aphids, flies, and mosquitoes
Nasturtiums Repel whiteflies, aphids, and squash bugs
Lavender Repels moths, fleas, and mosquitoes
Dill Attracts beneficial wasps and repels tomato hornworms
Parsley Attracts beneficial insects that prey on tomato pests

When choosing companion flowers, look for plants that have strong scents or bright colors, as these are more likely to attract beneficial insects. Additionally, be sure to choose flowers that bloom at the same time as your tomato plants to ensure they are present when pests are most active.

Planting Strategies for Companion Flowers

When planting your companion flowers, consider placing them in a border around your tomato plants or interspersing them throughout your garden. Be sure to plant them close enough to your tomato plants for their scents to be effective in repelling pests.

Alternatively, you can plant your companion flowers in containers near your tomato plants or create a separate small garden space specifically for companion planting.

Pest-Resistant Flowers for Tomato Plants

Companion flowers not only attract beneficial insects for tomato plants, but some also have pest-repellent properties. By planting these flowers near your tomato plants, you may be able to reduce the damage caused by common tomato pests without resorting to chemical pesticides.

Flower Pest-Repellent Properties
Marigold Repels nematodes, whiteflies, and other pests.
Nasturtium Repels aphids, squash bugs, and other pests.
Petunia Repels aphids, tomato hornworms, and other pests.
Basil Repels flies and mosquitoes.

Marigold is perhaps the most well-known companion flower for tomato plants. Its strong scent is believed to mask the scent of tomato plants, effectively keeping pests at bay. Nasturtium is another great option, as it releases mustard oil that repels many pests. Petunias contain solanine, which is toxic to many insects. Basil is a popular herb that is also a natural pest repellent for many plants, including tomatoes.

When choosing pest-resistant flowers, it’s important to consider the specific pests in your area and their feeding habits. For example, if you have problems with aphids, then nasturtium would be a good choice. On the other hand, if your main issue is nematodes, then marigolds would be more effective.

However, it’s important to note that companion flowers alone are not a guaranteed solution to pest problems. They should be used in conjunction with other natural pest control methods, such as crop rotation, integrated pest management, and regular monitoring of your plants.

Planting Strategies for Companion Flowers

Companion flowers can be planted alongside tomatoes to help control pests and provide other benefits, such as attracting beneficial insects. Here are some planting strategies to consider:


One common strategy is to interplant flowering herbs and plants among your tomato plants. For example, you can plant basil, marigolds, or petunias in between your tomato plants. This helps create a diverse environment that can deter pests and attract beneficial insects.

Border Planting

Another strategy is to plant companion flowers as a border around your tomato garden. This creates a barrier that can help repel pests, while also adding visual interest and color to your garden. Suitable border plants include chrysanthemums, lavender, and calendula.

Pot Planting

If you have limited space, you can plant companion flowers in pots and place them around your tomato plants. This allows you to move them around as needed, and also ensures that they are close enough to provide the intended benefits.

Succession Planting

Succession planting involves planting different companion flowers at different times throughout the growing season. This ensures that you have a variety of flowers blooming at all times, which can provide a more consistent pest control and attract more beneficial insects.

Whatever planting strategy you choose, be sure to consider the specific needs of each companion flower and how it will interact with your tomato plants.

Caring for Companion Flowers

Companion planting can be a great way to control pests on your tomato plants naturally. However, it is important to ensure that your companion flowers are well taken care of to reap the benefits they offer. Here are some tips for caring for your companion flowers:

  1. Watering: Make sure to water your flowers regularly. Most companion flowers prefer well-drained soil, so be careful not to overwater them.
  2. Fertilizing: Companion flowers generally don’t require heavy fertilization. If you do decide to fertilize, use natural options like compost or organic fertilizer.
  3. Pruning: Keep an eye on your companion flowers and prune them as needed to prevent them from getting too large and overshadowing your tomato plants.
  4. Deadheading: Deadheading your flowers (removing spent blooms) can encourage more blooms and keep your plants looking tidy.
  5. Pest control: Keep an eye out for pests that may be attracted to your companion flowers. If you notice any, take appropriate measures to control them, such as handpicking or using natural pest control methods.

By taking care of your companion flowers, you can create a healthy and beautiful environment for your tomato plants while naturally controlling pests.

Monitoring and Identifying Tomato Pests

It’s important to regularly monitor your tomato plants for any signs of pests. Some common pests that can attack tomato plants include aphids, whiteflies, and spider mites.

If you notice that the leaves on your tomato plants are yellowing or wilting, or if you see small insects crawling on the leaves, it’s time to take action.

Identifying Tomato Pests

In order to effectively control pests on your tomato plants, it’s important to be able to identify them. Here are some common tomato pests and how to recognize them:

Pest Description Control
Aphids Small insects that suck the sap from tomato plants Spray plants with a strong jet of water or use insecticidal soap
Whiteflies Small, white, winged insects that suck the sap from leaves Use yellow sticky traps or insecticidal soap
Spider Mites Tiny pests that spin webs on leaves and suck the sap from plants Spray plants with a strong jet of water or use insecticidal soap

Preventing Tomato Pests

One of the best ways to control tomato pests is to prevent them from becoming a problem in the first place. Here are some tips:

  • Plant companion flowers that repel pests and attract beneficial insects
  • Keep tomato plants healthy with proper soil, water, and nutrient management
  • Clean up garden debris and weeds regularly to reduce hiding places for pests

By taking a proactive approach to pest control and monitoring your tomato plants regularly, you can ensure a healthy and productive harvest.

Integrated Pest Management

Integrated pest management (IPM) is a holistic approach to pest control that emphasizes prevention and minimizes the use of pesticides. The goal is to create a healthy environment for plants and their beneficial insects, while reducing the presence of harmful pests.

IPM strategies for tomato plants include planting companion flowers that attract beneficial insects and repel pests, monitoring pest populations, and identifying the pests that are present. By understanding the lifecycle and behavior of these pests, you can take action at the right time to disrupt their reproduction and prevent infestations.

Companion Flowers as a Preventative Measure

Companion flowers are one of the best preventative measures you can take to protect your tomato plants from pests. By interplanting flowers that attract beneficial insects, you create a diverse ecosystem that can help control pests naturally.

Some of the best companion flowers for tomato plants include marigolds, nasturtiums, and petunias. These flowers not only attract beneficial insects like ladybugs and lacewings but also repel pests like aphids and whiteflies.

Monitoring and Identification

Regular monitoring of your plants is essential for effective pest control. By checking your plants regularly, you can identify any issues early and take action before they become a problem.

When monitoring your plants, be on the lookout for signs of pest damage such as wilted leaves, yellowing or curling leaves, and stunted growth. You can also use traps and sticky tapes to monitor pest populations and identify the specific pests that are present.

Control Measures

If you identify a pest infestation on your tomato plants, there are several control measures you can take. One of the most effective methods is to use beneficial insects like ladybugs and lacewings to prey on the pests. You can also use organic pesticides like neem oil or insecticidal soap.

Physical control measures like handpicking pests or using row covers can also be effective, especially if used in combination with other control methods.

Remember, the key to successful pest control is to take a holistic approach that focuses on prevention, early detection, and targeted control measures. By implementing an integrated pest management plan for your tomato plants, you can ensure a healthy and productive garden for years to come.

Natural Remedies for Tomato Pests

While companion flowers can be very effective in controlling tomato pests, sometimes additional measures are necessary. Here are some natural remedies you can try:

Neem oil spray

Neem oil is a botanical insecticide that can be sprayed on tomato plants to repel a wide variety of pests. Mix one tablespoon of neem oil with one gallon of water and add a few drops of dish soap to help the mixture adhere to the leaves. Spray the solution on your tomato plants every seven to fourteen days, especially during the growing season.

Garlic spray

Garlic contains natural insecticides that can repel and kill tomato pests. To make a garlic spray, puree a few cloves of garlic with a quart of water in a blender. Strain the mixture through cheesecloth to remove any solids and add a few drops of dish soap. Spray the solution on your tomato plants as needed.

Diatomaceous earth

Diatomaceous earth is a powdery substance made from the fossilized remains of aquatic organisms. It can be sprinkled on the soil around tomato plants to kill pests like slugs, snails, and beetles. The sharp edges of the diatomaceous earth cut into the pests’ exoskeletons, causing them to dehydrate and die.


If you only have a few pests on your tomato plants, one of the most effective methods is to simply pick them off by hand. Look for pests like caterpillars, tomato hornworms, and aphids and remove them from your plants carefully. If you have a large infestation, you can also consider using sticky traps to catch adult insects.

By combining companion flowers and natural remedies, you can create an effective and eco-friendly system for controlling tomato pests. Be sure to monitor your plants regularly and adjust your pest control strategy as needed to keep your tomatoes healthy and thriving.

Common Questions about Companion Flowers for Tomato Pest Control

If you’re new to using companion flowers for tomato pest control, you may have some questions about how it works and what to expect. Here are some commonly asked questions and their answers:

Can companion flowers really help control tomato pests?

Yes! Companion planting is a natural and effective way to control tomato pests without using harmful chemicals. By planting flowers that repel pests or attract beneficial insects, you can create a more balanced ecosystem in your garden.

What are some flowers that repel pests from tomatoes?

Marigolds, nasturtiums, and petunias are all known for their ability to repel tomato pests like whiteflies and nematodes. Plant them around your tomato plants for best results.

What are some flowers that attract beneficial insects for tomato plants?

Lavender, borage, and dill are just a few examples of flowers that attract beneficial insects like ladybugs and lacewings. These insects can help control pests like aphids and spider mites.

Do I have to plant the flowers right next to the tomato plants?

No, you don’t have to plant them right next to each other, but it is best to keep them within close proximity. Consider planting them in a border around your tomato plants or in nearby containers.

What’s the best way to care for companion flowers?

Companion flowers are generally easy to care for and require similar growing conditions to your tomato plants. Make sure they are getting enough water, sunlight, and nutrients, and remove any dead flowers or foliage regularly.

How do I know if my tomato plants have pests?

Regularly monitoring your plants is important for early detection of pests. Look for signs like yellowing leaves, stunted growth, or discoloration on the fruit. You can also use yellow sticky traps to catch whiteflies and other flying insects.

Can I use companion flowers as my only method of pest control?

While companion flowers can be very effective, it’s always best to use multiple methods of pest control to ensure the health and productivity of your tomato plants. Consider also using integrated pest management strategies, such as rotating crops and using natural remedies.

Expert Tips for Successful Tomato Pest Control

Companion flowers can be a great natural way to control pests on your tomato plants. But what else can you do to ensure your plants stay healthy and pest-free? Here are some expert tips:

  1. Rotate Your Crops: Tomato plants should be rotated every year to avoid the buildup of soil-borne diseases and pests. Choose a different location in your garden or plot each year.
  2. Water Regularly: Tomatoes need consistent watering to produce healthy fruit and to prevent stress. Water deeply and regularly, especially during hot and dry spells.
  3. Use Natural Fertilizers: Synthetic fertilizers are often high in nitrogen and can promote soft, succulent growth that is more susceptible to pests. Use natural fertilizers like compost, fish emulsion, or bone meal instead.
  4. Prune Your Plants: Remove any unwanted growth to help increase air flow around your plants, which can reduce the risk of disease. Pruning can also help direct energy to fruit production rather than foliage.
  5. Trap and Eliminate Pests: Use sticky traps or hand-pick pests like caterpillars and slugs to control their populations. This can be a tedious task, but it can be more effective than using chemical pesticides.
  6. Monitor Plants Regularly: Check your plants often for any signs of distress or pests. This can help catch any problems early and prevent them from spreading.

By following these tips along with using companion flowers, you can help ensure a healthy and abundant harvest of tomatoes. Happy gardening!


Q: Do companion flowers really work for tomato pest control?

A: Yes, they do! Companion flowers can attract beneficial insects that prey on tomato pests and can also deter pests through their scent.

Q: What are some good companion flowers for tomato plants?

A: Marigolds, nasturtiums, and petunias are all great options for repelling pests from tomato plants. Be sure to choose flowers with strong scents and bright colors to attract beneficial insects.

Q: How do I incorporate companion flowers into my tomato garden?

A: Plant companion flowers around the perimeter of your tomato garden or within the garden in between tomato plants. Be sure to follow planting guidelines for each specific flower and tomato plant.

Q: What if I already have pests on my tomato plants?

A: You can still incorporate companion flowers for future pest control, but it’s important to take immediate action to remove the current pests using natural remedies or integrated pest management techniques.

Q: Can I use chemical pesticides in conjunction with companion flowers?

A: It’s not recommended. Chemical pesticides can harm beneficial insects and can also diminish the effectiveness of companion flowers in pest control.

Q: How often should I monitor my tomato plants for pests?

A: It’s recommended to monitor your plants daily, especially if you notice any signs of pest damage such as holes in leaves or wilting plants.

Q: Can I use companion flowers for pest control on other types of plants?

A: Yes, companion planting can be used for pest control on a variety of plants, not just tomatoes. Do your research to find the best companion plants for your specific garden.