Common Calendula Pests: Does Pot Marigold Attract Pests to the Garden?

Calendula: the ultimate garden charmer.

Pretty, medicinal, tasty as tea, and easy to grow, you may have grabbed a packet of seeds during your spring fever with plans to liberally sprinkle these plants throughout your garden this year.

A close up vertical image of calendula flowers growing in large blue ceramic pots in the vegetable garden. To the center and bottom of the frame is green and white printed text.

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But then you started doing some research and realized that the jury was out on whether these beauties were such a good addition after all.

Some say it attracts pests, including aphids. Shudder.

Others say it’s a good companion plant for certain vegetables.

So, which is it?

This depends on how you look at it, plan to use it, and which insects Mother Nature deals you this year, as you’ll find out below.

Let’s talk about it.

Here’s what we’ll cover in this guide:

What Is Calendula?

Sporting beautiful bright blooms in sunny shades of orange, yellows, creams, and hues in between, these flowers are a popular addition to flower, herb, and vegetable gardens.

Also known commonly as pot marigolds, their botanical name is Calendula officinalis.

A close up horizontal image of pot marigold (calendula) flowers growing in the summer garden.

If the name sounds familiar but you’re not sure that it’s because you’ve seen seed packets in the gardening aisle, you may have skimmed over products containing extracts in the pharmacy aisle.

Calendula is a long-used, popular natural and traditional medicine used for a variety of things including wound healing. It has anti-inflammatory, anti-fungal, antibacterial, and anti-cancerous properties, among others.

A horizontal image of a gardener picking pot marigold flowers and placing them in a wicker basket.

Pot marigold extracts are also useful as insecticides. Dried flowers are sometimes used as an insect repellent, which makes sense, as the flower extracts have been found to show insecticidal activity.

Bugs Attracted to Calendula

This flower has its fair share of interested insects, but not all of them are bad bugs.

Pests that you may see making a meal of it include blister beetles, tarnished plant bugs, spider mites, thistle butterfly caterpillars, slugs, flea beetles, cucumber beetles, and, most commonly, whiteflies and aphids.

A close up of a shiny leaf beetle on a yellow flower pictured on a soft focus background.
Leaf beetle.

So, the answer to the question of whether it attracts pests or not is yes.

But if pot marigold attracts these unwanted beasties, why is it often listed as a companion plant, trap crop, or even a beneficial plant?

A close up horizontal image of a hover fly feeding from the center of an orange flower pictured on a soft focus green background.
Hoverfly.

That’s because hoverflies, predatory Miridae, ladybugs, lacewings, minute pirate bugs, and a variety of other beneficial insects also love this cheerful bloom.

Let’s take a look at the role this can play in your garden when you choose to plant calendula.

Calendula in the Garden

C. officinalis is full of goodies for the highly desired insects mentioned above.

In general, it tends to benefit populations of natural pest predators, attracting them to the garden and encouraging them to settle, reproduce, and contribute to pest control and pollination.

A close up horizontal image of a yellow pot marigold flower with a ladybug on one of the petals pictured in bright sunshine on a soft focus background.
Ladybug.

The flowers produce a lot of pollen and nectar. Orius sauteri, for one, a type of pirate bug, appreciates these delectable and nutritious floral resources, and in turn helps to suppress aphids and thrips.

Hoverflies and other useful Hemipteran insects also enjoy a calendula-flavored meal of pollen or nectar.

The plant also provides shelter, such as overwintering sites loved by Dicyphus, a generalist predator bug that you really can’t get enough of in your garden.

Hence, it can be a very useful garden addition, and not only for its beneficial insect appeal.

Studies have shown that intercropping calendula with carrots reduced carrot pest damage, including that caused by nematodes.

Plus, it reduced diamondback moth incidence when intercropped with white cabbage in another study. All this to say it makes an excellent companion plant.

Calendula can help to prevent beetles from attacking asparagus and repel tomato hornworms from tomatoes, plus it will entice aphids away from making a meal out of your beans.

A close up horizontal image of calendula flowers growing as a companion with kale and basil.

Herein lies the key to this plant being a good choice as a trap crop.

Since it is so eye-catching to the average insect, when paired with certain crops, it can serve as the more alluring option. And if the pest insect is busy on your pot marigolds, it won’t be bothering your crops.

The trick for trap crops to work is treating or sacrificing the plants once they’re infested, so they don’t become a haven for pests to then disperse to your crops.

Of course, considering calendula is like a bed and breakfast for good bugs too, if you do decide to treat your plants with insecticides, use something safe for beneficial insects.

In order to know when your calendula needs treating or sacrificing, however, you must keep a good eye on it. But that’s not a chore, since they’re a treat for the eyes!

You can read more about implementing a trap-cropping strategy in your garden here.

The Prince Charming of Blooms

If you’ve considered adding this beauty to your garden but aren’t sure if it’s a smart bloom choice, I hope this guide has helped to show how it can be a useful addition.

Attractive to both pests and beneficials, it’s a matter of weighing which category has the upper hand in your garden, and using the flowers to your advantage.

A close up horizontal image of bright orange calendula flowers growing en mass in the garden.

I’m planting calendula in my vegetable garden this year – once it stops surprise snowing, that is! Zone 3 problems…

Are you sowing these flowers this season? Keep me updated on which insects you see visiting, and whether they’re good or bad bugs, in the comments below.

And for more information about other functional flowers, check out these guides next:

Photo of author
Sylvia Dekker is a nature-inspired creative with a bachelor’s degree in agriculture, a history of Canadian province-hopping, and a life filled with brown thumbs, bee stings, and tan lines. When Sylvia travels, on mountain or steppe, she harvests knowledge, experiences, and honey, goes starry-eyed over each tiny plant, and writes about it all.

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