12 Best Arugula Companion Plants: Grow More, Pest-Free Greens

In this guide, we’ll explore the benefits of planting bush beans with arugula for a nitrogen boost and dive into the specific companion plants for arugula in raised beds that will transform your garden from a struggling patch into a thriving, self-protecting ecosystem.

The Benefits of Arugula Companion Planting

Have you ever grown arugula only to watch it turn bitter and shoot up to seed in a matter of days? I have been there too. It is frustrating. You wait weeks for those peppery leaves, and then poof – the plant bolts. Arugula is a cool-season crop. It loves spring and fall.

But when summer heat arrives, it panics. It thinks, "I need to make seeds before I die!" And suddenly your tender leaves become tough, spicy, and terrible. The good news is that companion planting can fix this. The right neighbors provide shade, keep the soil cool, and even improve the flavor. Let me explain how it works.

How Arugula Benefits from Good Neighbors

Arugula has shallow roots. It does not go deep into the soil. This means it cannot reach water that is far down. It needs consistent moisture near the surface. Good companions help by shading the soil, which keeps it cool and damp. Companion planting also adds nitrogen to the soil. Peas and beans are especially good at this. They pull nitrogen from the air and turn it into food that arugula can eat. Healthier arugula means slower bolting and better flavor.

One more benefit: pest confusion. Flea beetles are arugula's number one enemy. They are tiny black bugs that jump like fleas. They eat tiny holes in the leaves. The holes make the arugula look ugly and taste less pleasant. Strong-smelling companions like marigolds and herbs confuse the beetles. They cannot find the arugula. They give up and leave. For more on starting your garden the right way, check out my beginner guide on how to start urban gardening

Protecting Your Greens: Natural Pest Repellents

Flea beetles are not the only pest that loves arugula. Aphids, cabbage loopers, and slugs also enjoy eating your greens. But you do not need harsh chemicals to stop them. The right companion plants act as bodyguards.
Let me show you the best ones I have used in my own garden.

What to Plant with Arugula to Repel Flea Beetles

Radishes are the unsung heroes of the garden. They grow fast. Really fast. You can harvest them in just 25 to 30 days. And here is the trick. Flea beetles prefer radish leaves over arugula leaves. So when you plant radishes next to arugula, the beetles go to the radishes first.

I plant radish seeds right between my arugula rows. The radishes sprout quickly. They act as a trap crop. The beetles eat the radish leaves and leave my arugula alone. Then I harvest the radishes before they get too big. Then I plant another batch. This works so well that I never grow arugula without radishes anymore.

Planting Marigolds with Arugula for Pest Control

Marigolds are the garden's bodyguards. I plant them near almost everything, including arugula. Their roots release a natural chemical that kills tiny worms called nematodes. Nematodes attack arugula roots underground. You never see them, but your plants will look sad and stunted. Marigolds also repel aphids and whiteflies. The strong smell confuses the pests. They cannot find the arugula. They fly away.

Arugula and Nasturtiums Companion Planting

Nasturtiums are the decoys. Aphids love them even more than arugula. So when aphids show up, they go to the nasturtiums first. This gives your arugula a fighting chance.
I plant nasturtiums about a foot away from my arugula bed. The bright orange and red flowers look beautiful.

And here is a bonus. Both the leaves and flowers of nasturtiums are edible. They taste peppery, like arugula. I toss them into the same salad.

Herbs to Plant with Arugula for Pest Management

Herbs are not just for cooking. They are also powerful pest repellents. Their strong smells confuse insects. Here are the top 4 best herbs for arugula.

1. Dill. This tall, feathery herb attracts beneficial wasps. The wasps lay their eggs inside cabbage loopers and other caterpillars. Gross but effective. Dill also repels aphids.
2. Cilantro. Also called coriander. Its strong citrusy smell confuses flea beetles. Plant cilantro seeds right next to your arugula. You can harvest the leaves all season. For more, see growing cilantro from seed .
3. Basil. This classic herb repels mosquitoes, whiteflies, and aphids. Plant one basil seedling next to your arugula. For tips, see how to grow basil from cuttings and propagating basil
4. Chives. Their onion smell repels aphids and spider mites. Chives are perennials, so they come back every year. See how to grow chives indoors for more.

Maximizing Harvest in Small Spaces

Not everyone has a big backyard. I certainly do not. Most of my arugula grows in small containers or raised beds on my patio. Small space gardening just requires a few clever pairings.

Companion Planting Arugula and Carrots for Space Saving

Carrots and arugula are the perfect space-saving pair. This is why:

Carrots grow deep into the soil. Their roots go down 6 to 12 inches. Arugula roots are shallow, only a few inches deep. So they do not compete for space or nutrients. They can grow right next to each other without fighting.
Also, arugula grows fast. It shades the soil, keeping it cool for the slower-growing carrots. The carrot tops (the green fronds) are light and airy. They do not block sunlight from the arugula.

I plant arugula seeds in between my carrot rows. The arugula is ready to harvest in 30 to 40 days. By then, the carrots are just starting to swell. I pull out the arugula, eat it, and the carrots have the whole bed to themselves.

Best Companion Plants for Arugula in Containers

Container arugula needs companions that stay small. You cannot plant sprawling nasturtiums or tall dill in a small pot. Here is what works.

1. Radishes. These fit perfectly around the edge of an arugula container. Tuck radish seeds into any empty space. They will be ready to harvest in 3 to 4 weeks.
2. Lettuce. This shallow-rooted green grows well in the same pot as arugula. They like the same conditions. For more, see grow lettuce indoors .
3. Spinach. Another cool-season green that pairs perfectly. See growing spinach in hydroponics for an advanced method.
4. Chives. A small pot of chives next to your arugula container repels pests without taking up root space.
   Make sure your container has drainage holes. Arugula hates wet feet. Water when the top inch of soil feels dry. For more container tips, see best plants for pots all year round.

Companion Plants for Arugula in Raised Beds

Raised beds give you more room. You can plant taller companions and spread things out. Here is my raised bed layout. I plant arugula down the center of the bed. On the north side, I put peas or beans. They grow tall and provide afternoon shade. On the south side, I put low herbs like dill and cilantro. Around the edges, I tuck radishes and marigolds.

This layout gives every plant sun. Nothing gets shaded out. The low herbs act as living mulch. They keep the soil cool and moist. The flowers attract bees. If you use raised beds, keep the soil fertile. Arugula is a light feeder, but it still needs nutrients. Add compost each spring. Water deeply twice a week.

Extending the Season: Beating the Heat

Arugula's biggest enemy is heat. When temperatures rise above 75°F (24°C), arugula wants to bolt. Bolting means it sends up a flower stalk and stops making new leaves. The existing leaves turn bitter.

Companion planting can delay bolting by providing shade.

Using Tall Plants to Shade Arugula from Bolting

Tall plants like peas, beans, and corn create dappled shade. This shade lowers the soil temperature by several degrees. Cooler soil means happier arugula.

I plant peas on the north side of my arugula bed in spring. The peas grow fast. By the time the weather warms up, the peas are tall. They cast shade over the arugula during the hottest part of the day. This gives me an extra 2 to 3 weeks of harvest before bolting.

Beans work the same way but grow better in warmer weather. Plant pole beans on a trellis. They will climb up and create shade for summer arugula (if you try a second planting in late summer for fall harvest).

Growing Arugula Under Tomato Plants for Shade

This is one of my favorite tricks. Tomato plants grow tall and bushy by midsummer. The lower parts of the tomato plant are shaded. That shaded spot is perfect for arugula. In late summer, I sow arugula seeds at the base of my tomato plants. The tomatoes are already large. They protect the young arugula from the hot afternoon sun. The arugula thinks it is growing in cooler weather. It does not bolt.

By the time the tomatoes finish producing in early fall, the arugula is ready to harvest. Sweet, tender, and not bitter at all. For more on growing tomatoes with companions, see my full guide on companion plants for tomatoes.

Now you know the best friends for your arugula. Radishes, marigolds, nasturtiums, carrots, peas, and tomatoes will protect, feed, and shade your greens. Some plants are terrible neighbors. They compete with arugula or share diseases.

Next: we will talk about what to keep away from your arugula. That includes mint, strawberries, fennel, and other brassicas. I will also answer common questions like "Can you plant arugula and lettuce together?" and "What herbs grow best with arugula?"

Keep reading to avoid the mistakes that cost me my entire harvests.

Salad Bowl Companions (Vegetables Only)

Before I get to the bad neighbors, let me answer two common questions about salad greens.

Growing Arugula and Spinach Together

Yes, absolutely. Arugula and spinach are perfect companions. They both love cool weather. They both grow fast. They both have shallow roots that do not compete. I plant spinach seeds right next to my arugula seeds. They sprout at the same time. I harvest the outer leaves of both as they grow. By the time the weather warms up, both plants bolt together. Then I pull them out and plant something else.

Can You Plant Arugula and Lettuce Together?

Yes, another perfect pairing. Lettuce has shallow roots just like arugula. Lettuce also prefers cool weather. They do not compete. Lettuce leaves are mild and crisp. Arugula leaves are peppery and tender. Together, they make the perfect salad base. I grow them side by side in every cool-season bed.

Mistakes to Avoid: The "Do Not Plant" List

Not every plant plays nice with arugula. I learned this the hard way. One year I planted strawberries next to my arugula. Aphids went wild. Both crops failed. Let me save you from the same mistakes.

What Not to Plant Next to Arugula

1. Mint: Mint is a garden bully. It spreads aggressively through underground runners. Its roots will choke out shallow-rooted arugula. Mint also releases chemicals that can slow the growth of nearby plants. Only grow mint in a container, far away from your arugula. For more on mint, see spearmint plant and propagating mint .
2. Strawberries: Strawberries are heavy feeders. They need a lot of nitrogen, phosphorus, and potassium. Arugula is a light feeder, but strawberries will still outcompete it. Worse, strawberries attract aphids. Aphids also love arugula. Planting them together creates an aphid buffet.
3. Fennel: Fennel is the bully of the garden. It releases chemicals from its roots that stop other plants from growing. Fennel can actually kill young arugula plants. Do not plant fennel anywhere near your arugula bed.
4. Potatoes: Potatoes and arugula are not enemies exactly, but they do not help each other. Potatoes take up a lot of space. They also attract potato beetles. The beetles will not eat arugula, but they will disturb the soil. Keep potatoes on the other side of your garden. For more on potatoes, see growing potatoes in straw.

Other Brassicas (Cabbage, Broccoli, Cauliflower, Kale)

This is the most important warning. Arugula is a brassica. So are cabbage, broccoli, cauliflower, kale, and Brussels sprouts. Brassicas share the same pests: flea beetles, cabbage loopers, and aphids. Planting them together is like inviting every pest in the neighborhood to a party.

If you plant arugula next to cabbage, the flea beetles will find both. They will multiply. Your entire brassica bed will be destroyed.

For more on brassica companions, see cauliflower companion plants and cabbage worms (a common pest).

You now know which plants to keep away from your arugula and how to pair it with other salad greens. In the final section, I will give you a printable quick reference chart that summarizes all 12 companion plants. I will also answer the most frequently asked questions about arugula companion planting and share tips for winter gardening.

That way, you can save the chart on your phone or pin it on your garden shed for easy reference.

Layout and Care

Getting the spacing right is just as important as choosing the right companions.

How Far Apart to Space Arugula and Companion Plants

My simple spacing guide:

Arugula itself needs space. Sow seeds 1 inch apart. Once seedlings are 2 inches tall, thin them to 4 inches apart. You can eat the thinnings in salads. If you want continuous harvest, sow new arugula seeds every 2 weeks. This is called succession planting. By the time one batch bolts, the next batch is ready.

Arugula Companion Plants for Winter Gardening

Arugula is a cold-hardy green. It can survive light frosts. In fact, frost sweetens the flavor. The cold converts starches into sugars. Winter arugula is actually sweeter than spring arugula.

For winter gardening, choose cold-tolerant companions. Spinach, kale, and garlic are excellent choices. Plant them in late summer or early fall. They will grow slowly through the winter and be ready for harvest in early spring. For more winter gardening tips, see winter vegetables to grow in pots .

Printable Arugula Companion Chart (Save This)

Here is a simple chart you can screenshot or print for your garden shed.

Plants to always avoid near arugula: Mint, strawberries, fennel, potatoes, and other brassicas (cabbage, broccoli, cauliflower, kale).

Frequently Asked Questions About Arugula Companions

For more on growing herbs, see growing cilantro from seed , how to grow basil from cuttings , and how to grow chives indoors .

Final Tips from an Urban Gardener

You made it to the end. That means you really care about growing better arugula. Thank you for reading. My simple three final tips. 

Start with radishes. They are the easiest and most effective companion for arugula. Plant them together. Watch the flea beetles go to the radishes. Harvest both. You will be hooked. Do not fear bolting. Even with perfect companions, arugula will eventually bolt when summer arrives. That is okay. Let it flower. The flowers are edible and bees love them. Then save the seeds for next season.

Keep planting. Arugula grows fast. Sow new seeds every 2 weeks from early spring through fall. With succession planting and good companions, you can have fresh arugula for 8 months of the year.

If you are just starting your urban gardening journey, read my full guide on how to start urban gardening . It covers soil, containers, watering, and everything else a beginner needs.

And if you ever struggle with pests, remember that my guides on white fuzzy bugs on plants , scales bugs on plants , and squash bugs are there to help.

One more thing before you go...

Now I have two small asks for you. First, drop a comment below. What is your biggest arugula struggle right now? Flea beetles? Bolting? Bitter flavor? Or do you have a companion planting tip that I missed? I personally reply to every comment within 48 hours.

Second, save this post for later. Pin the printable chart to your Pinterest board. Share this guide with a friend who grows arugula. The more people who grow their own food, the better. 

Now go plant those arugula seeds. And give them some good friends.

Happy gardening!