Do Marigolds Repel Aphids?



Are you a gardener who is frustrated with aphids infesting your plants? Have you heard that marigolds can repel aphids, but you’re not sure if it’s true? In this article, we will explore the question, "Do marigolds repel aphids?" and provide you with all the information you need to know about using marigolds in your garden to combat these pesky pests.

Marigolds and Aphids

Aphids are small, soft-bodied insects that feed on the sap of plants.

They can quickly multiply and cause damage to your garden by stunting plant growth, deforming leaves, and spreading diseases.

Many gardeners struggle with aphid infestations and are constantly searching for effective ways to control them.

Marigolds, on the other hand, are vibrant and beautiful flowers that are commonly found in gardens.

They are known for their strong scent, which is believed to repel certain pests, including aphids. But do marigolds really repel aphids, or is it just a myth? Let’s find out.

The Science Behind Marigolds and Aphids

Research has shown that marigolds do indeed have some repellent properties against aphids.

The strong scent of marigolds is believed to mask the scent of the plants that aphids are attracted to, making it difficult for them to locate their preferred host plants.

Additionally, marigolds produce a chemical compound called alpha-terthienyl, which has been found to have insecticidal properties.

This compound can deter aphids and other pests from feeding on the plants.

However, it’s important to note that while marigolds can help repel aphids, they are not a foolproof solution.

They may not completely eliminate aphids from your garden, especially if you have a severe infestation.

It’s always best to use a combination of methods to control aphids and other pests in your garden.

How to Use Marigolds to Repel Aphids

If you’re interested in using marigolds to repel aphids in your garden, here are some tips to get you started:

  1. Plant marigolds strategically: Place marigolds near plants that are susceptible to aphid infestations. The strong scent of marigolds can help deter aphids from attacking these plants.
  2. Interplant marigolds with vegetables: Consider interplanting marigolds with your vegetable plants. This can create a natural barrier and help prevent aphids from reaching your vegetables.
  3. Use marigold extracts or oils: You can also make use of marigold extracts or oils to create a natural aphid repellent spray. Simply mix the extract or oil with water and spray it on your plants.
  4. Rotate marigolds in your garden: To maximize the effectiveness of marigolds in repelling aphids, it’s recommended to rotate them in your garden each year. This prevents aphids from becoming accustomed to the scent of marigolds.


In conclusion, marigolds can indeed help repel aphids in your garden. Their strong scent and insecticidal properties make them a valuable tool in the fight against aphid infestations.

However, it’s important to remember that marigolds are not a standalone solution and should be used in conjunction with other pest control methods.

By strategically planting marigolds and implementing other preventive measures, you can significantly reduce the risk of aphid damage in your garden.

Frequently Asked Questions

Do marigolds repel other pests besides aphids?

Yes, marigolds are known to repel other pests as well, including nematodes, whiteflies, and certain types of beetles.

Their strong scent and insecticidal properties make them a versatile companion plant in the garden.

Can I use any type of marigold to repel aphids?

While all marigolds have some level of repellent properties, some varieties are more effective than others.

French marigolds (Tagetes patula) and African marigolds (Tagetes erecta) are particularly known for their pest-repelling abilities.

How many marigolds should I plant in my garden?

The number of marigolds you should plant depends on the size of your garden and the severity of the aphid infestation.

As a general guideline, aim to plant at least one marigold for every 3 to 4 square feet of garden space.

Can marigolds attract beneficial insects?

Yes, marigolds can attract beneficial insects such as ladybugs and lacewings, which are natural predators of aphids.

By attracting these beneficial insects to your garden, marigolds can help create a balanced ecosystem and further control aphid populations.

Can I use marigolds as a companion plant for all vegetables?

Marigolds are generally compatible with a wide range of vegetables. However, they may not be suitable for plants that prefer acidic soil, such as potatoes and tomatoes.

It’s always best to research the specific needs of your vegetable plants before interplanting them with marigolds.

Are marigolds safe for pets and children?

Marigolds are generally considered safe for pets and children. However, it’s always a good idea to supervise pets and children around plants and avoid ingestion of any plant material.

If you have concerns about allergies or sensitivities, consult with a healthcare professional.

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