Companion vegetables for tomatoes
37 Best and Worst Companion Plants for Tomatoes
Keep Pests at Bay While Encouraging Healthy Fruit
By
Marie Iannotti
Marie Iannotti
Marie Iannotti is a life-long gardener and a veteran Master Gardener with nearly three decades of experience. She's also an author of three gardening books, a plant photographer, public speaker, and a former Cornell Cooperative Extension Horticulture Educator. Marie's garden writing has been featured in newspapers and magazines nationwide and she has been interviewed for Martha Stewart Radio, National Public Radio, and numerous articles.
Learn more about The Spruce's Editorial Process
Updated on 10/03/22
Reviewed by
Julie Thompson-Adolf
Reviewed by Julie Thompson-Adolf
Julie Thompson-Adolf is a master gardener and author. She has 13+ years of experience with year-round organic gardening; seed starting and saving; growing heirloom plants, perennials, and annuals; and sustainable and urban farming.
Learn more about The Spruce's Review Board
Fact checked by
Jessica Wrubel
Fact checked by Jessica Wrubel
Jessica Wrubel has an accomplished background as a writer and copy editor, working for various publications, newspapers and in public libraries assisting with reference, research and special projects. In addition to her journalism experience, she has been educating on health and wellness topics for over 15 years in and outside of the classroom.
Learn more about The Spruce's Editorial Process
The Spruce
In This Article
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What Is Companion Planting
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Best Companions
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Worst Companions
Companion planting is the practice of planting specific crops in close proximity to each other to enhance nutrient uptake, provide pest control, encourage pollination, and increase crop production.
Seasoned gardeners have determined that certain plants improve the growth of tomatoes by repelling insect pests and diseases, while others are best kept at a distance.
Learn which herbs, flowers, and root vegetables make the best (and worst) tomato companion plants.
A Great Trio of Companion Plants: Tomatoes, Squash, and Borage
What Is Companion Planting
Companion planting is also known as interplanting, intercropping, or creating a polyculture. It is the practice of partnering plants so they gain mutual benefits from growing near one another or from succession planting (staggering crop plantings).
The benefits of companion planting include pest control, weed reduction, and disease prevention. Some plant partnerships can enhance soil and attract pollinators. Applying companion planting practices in your tomato garden will help manage damaging pests that are attracted to this vegetable.
Best Tomato Companion Plants
What grows best next to tomatoes? Here are recommended companion plants—both best plants and beneficial plants—that can improve the health and flavor of tomatoes, and include the following herbs, flowers, and root vegetables. Some plants are used as standard crops and others are used as cover crops (grown solely to improve the soil, prevent erosion, and act as mulch).
Best Companion Plants
- Basil: Basil is an important tomato companion plant because the herb repels insects, improves growth, and enhances flavor. Basil also repels mosquitoes and flies (even fruit flies).
- Bush beans: Short plants like bush beans help tomato plants in an unusual way; this plant increases the air circulation around tomato plants, eliminating any damp and humid conditions from developing that would attract spores. Bush beans also attract bumble bees.
- Clovers: Crimson clover and red clover help tomatoes in various ways. Both plants provide nitrogen to the soil. In addition, they both deter weed growth and attract pollinators like bumble bees and other beneficial insects.
- Collards: Plant collard greens a few feet away from tomatoes to lure away damaging harlequin bugs, but consider them sacrificial plants that can't be harvested.
- Cowpeas: Also called black-eyed peas, cowpeas act as a lure for the southern green stink bug, which loves to feed on many plants, including tomatoes.
- Cucumbers This classic standard crop thwarts the germination of weed seeds because the plant's ground cover hinders sunlight from reaching them. However, many gardeners prefer to keep cucumbers away from tomatoes because they can share the same diseases, such as mosaic virus and phytophthora blight.
- Dill, oregano, and cilantro: These herbs are other important companions that encourage beneficial bugs to stay and eat pests and parasitic bugs that damage tomato plants.
- Mustard greens: Plant mustard greens only as a cover crop and mix the greens into the soil before planting tomatoes to reduce verticillium wilt, a common problem for tomato plants.
- Oat and winter rye: These grasses are great allies for tomato plants because they control weed growth. Weeds can't grow through the oat's matting and winter rye greatly reduces weed growth by hindering seeds from germinating.
- Radishes: Plant radishes right near the bases of tomatoes as sacrificial plants used to stop flea beetles from attacking tomatoes.
- Sunflowers and coneflowers: The cheerful flowers are favorites of bumble bees that pollinate tomatoes.
- Sweet alyssum. The flowers feed good bugs (like parasitic wasps) that eat aphids.
- Thyme: This herb is specifically helpful in reducing the egg-laying efforts of adult armyworms, especially the yellow-striped armyworm most prevalent in the eastern part of the U.S.
Other Beneficial Plants
- Amaranth: This plant helps repel pests by attracting predatory beneficial insects.
- Borage: This plant improves growth and flavor and repels tomato hornworms.
- Bee balm, chives, mint, lemon balm, and parsley: These herbs improve health and flavor. Be careful when companion planting bee balm, lemon balm, and mint, as they can become invasive.
- Carrots: Plant carrots near tomatoes to help loosen soil. If planted too closely, the carrots may not get as large as they should, but they will still taste good.
- Garlic: This plant repels red spider mites. Garlic sprays help control late blight.
- Lettuce: Lettuce benefits from being planted in the shade of taller tomato plants, but it provides a living mulch—helping to keep the soil cool and moist.
- Marigolds: French marigolds are small companion plants that grow well with tomato plants in containers. Marigolds are beneficial because the flower repels pests and reduces root-knot nematodes in soil.
- Nasturtium: This flower not only looks lovely planted with tomatoes, but it also serves as a trap crop for aphids. Plus, it's an edible flower, making a pretty—and tasty—addition to salads.
Learn 10 Herbs That Help Tomato Plants Thrive
Worst Tomato Companion Plants
These plants are infamous for inhibiting tomato plant growth and increasing their susceptibility to pests or diseases and should not be planted with tomatoes.
- Cabbage (Brassica) family: Relatives of cabbage stunt the growth of tomato plants (including broccoli, Brussels sprouts, cabbage, cauliflower, collards, kale, kohlrabi, rutabaga, and turnip). However, some gardeners do like placing collard greens a few feet away from their tomato plants to lure away damaging harlequin bugs.
- Corn: The corn earworm is the same as the tomato fruitworm (Helicoverpa zea). Growing plants in proximity that are susceptible to the same pests can invite disaster and a decimated garden.
- Eggplant, peppers, and potatoes: These plants are in the nightshade family like tomatoes, and are all susceptible to early and late blight, which can build up in the soil and get worse each year. Avoid planting them near each other or in place of each other for at least three years. Hornworms (Manduca quinquemaculata, the larva stage of the five-spotted hawkmoth) love the foliage and fruit of tomatoes, peppers, and eggplants and can quickly decimate plants. Also, planting tomatoes near potatoes can make the potatoes more susceptible to potato blight.
- Fennel: Fennel secretes a substance from its roots that inhibits tomato plant growth. This secretion affects many other garden plants, too. However, some gardeners deploy fennel to manage aphid invasions.
- Walnuts: Do not plant tomatoes under walnut or butternut trees, which produce an allelopathic chemical called juglone that inhibits the growth of tomatoes (and all the members of the nightshade family). Tomatoes are also susceptible to the disease walnut wilt.
Tomatoes and Roses
While several plants are touted as terrific tomato companions, tomatoes can act as companion plants, too. Tomatoes have been shown to protect roses from a disease called black spot.
If you can't plant tomatoes among your roses, make a spray of liquefied tomato leaves, a tablespoon of cornstarch, and about 4 pints of water. Spritz your roses once a week to keep black spot at bay.
The Spruce / K. DaveGreat Companion Plants for Roses
Article Sources
The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
Cover Crops. USDA.
Pest Control Companion Planting Chart. Brigham Young University.
Phytophthora Blight. University of Massachusetts Vegetable Extension Program.
Baker, Brian P. and Grant, Jennifer A. Garlic and Garlic Oil Profile. New York State Integrated Pest Management. Cornell University.
Companion Planting Chart. University of California Cooperative Extension.
Gardening: It’s a Risky Business. Mississippi State University Extension, 2019.
Gevens, Amanda; Seidl, Anna; Hudelson, Brian. Late Blight. University of Wisconsin-Madison Extension, 2017.
Bauske, Mitchell J.; Robinson, Andrew P.; Gudmestad, Neil C. Early Blight in Potato. North Dakota State University, 2018.
Herb Gardening. Colorado State University Extension.
Walnut Wilt. Kansas State University Research and Extension, 2022.
Gray, Laveryne. Companion Plantings: Tomatoes and Roses. Marion County Master Gardeners.
Companion Planting for Garden Insect Balance
Plants to Attract Beneficial Insects and Repel Pests
By
Marie Iannotti
Marie Iannotti
Marie Iannotti is a life-long gardener and a veteran Master Gardener with nearly three decades of experience. She's also an author of three gardening books, a plant photographer, public speaker, and a former Cornell Cooperative Extension Horticulture Educator. Marie's garden writing has been featured in newspapers and magazines nationwide and she has been interviewed for Martha Stewart Radio, National Public Radio, and numerous articles.
Learn more about The Spruce's Editorial Process
Updated on 10/21/20
Reviewed by
Barbara Gillette
Reviewed by Barbara Gillette
Barbara Gillette is a master gardener, herbalist, beekeeper, and journalist. She has 30 years of experience propagating and growing fruits, vegetables, herbs, and ornamentals.
Learn more about The Spruce's Review Board
istetiana / Getty Images
Companion planting is an age-old gardening methodology, especially for vegetables. This is a practice that involves planting two or more different plants near each other to derive some type of benefit. That benefit could be more vigorous growth, higher yield, repelling pests, or attracting the predators of common pests. While scientific research may not always agree with the folklore surrounding companion planting, at the very least it adds diversity in the garden, which itself may cut back on problems and increase yields.
Learning which plants to pair as companions takes a bit of trial and error. For example, anise seems to germinate better when grown with coriander, but coriander doesn’t grow well next to anise. Garlic deters Japanese beetles but when planted too close to anything in the pea and bean family it will inhibit their growth.
Companion Plants to Attract Beneficial Insects
One compelling reason to practice companion planting is the tendency of certain plants to attract beneficial insects. Beneficials are insects that feed on common garden pests, like aphids and caterpillars. Beneficial insects are considered the good guys and are the best reason not to spray insecticides at random.
These beneficial insects should be welcome in your garden:
- Parasitoid wasps feed on aphids, caterpillars, and grubs.
- Lacewing larvae feed on aphids.
- Ladybug larvae feed on aphids.
- Ground beetles feed on ground-dwelling pests.
- Hoverflies and robber flies feed on many insects, including leafhoppers and caterpillars.
- Mantids feed on flying insects such as cucumber beetles and squash bugs
- Common garden spiders feed on grasshoppers and caterpillar laying moths.
Because insects tend to have different feeding requirements during the various stages of their development, a diversity of plant material is essential to attracting them. Although beneficial insects do feast on pest insects, there may be certain points in their life cycles when their diets are confined to nectar and pollen. To attract these insects to your garden, you will need to provide host plants and even plants for shelter. Planting a small bed of Zinnias in the vegetable garden will bring in pollinators which also helps to increase yields from beans, squash, vine fruits such as melons, and cucumbers. Sunflowers make excellent borders, also attracting pollinators and providing food for songbirds.
Best (and Worst) Companion Plants for Cucumbers
Diversity in both plant material and the season of availability is crucial. Hedgerows used to serve this function. The trees, shrubs, and weeds would leaf out sooner in the spring than cultivated crops and provide early food sources.
Hedgerows are rare today, but you could easily plant a mixed border of fruiting and flowering trees, shrubs, and perennials that have something in bloom all season. This patchwork of plants would benefit your ornamentals, and planting it near a vegetable garden will ensure beneficial insects on your vegetable crops.
mark watson (kalimistuk) / Getty ImagesWhat You’ll Need to Attract Beneficial Insects
Use these plants and garden layout to attract beneficial insects:
- Low-growing plants as cover for ground beetles (thyme, rosemary, or mint)
- Shady, protected areas for laying eggs
- Tiny flowers for tiny wasps, like plants from the Umbelliferae family: fennel, angelica, coriander, dill, Queen Anne’s lace, clovers, yarrow, and rue
- Composite flowers (daisy and chamomile) and mints (spearmint, peppermint, or catnip) to attract predatory wasps, hoverflies, and robber flies
Using Herbs As Companion Plants to Deter Pests
Herbs work especially well as companion plants. They multitask by attracting beneficial insects and repelling pest insects and their fragrance and foliage make them good companions in both the vegetable garden and the ornamental border. The following list is compiled from experience and suggestions. Keep in mind that some things work in conjunction with other factors in the environment and your results might not be the same as mine. However, with some tweaking here and there, you should be able to use plants to keep a better balance in your gardens.
- Aphids: chives, coriander, nasturtium
- Ants: tansy
- Asparagus beetle: pot marigold
- Bean beetle: marigold, nasturtium, rosemary
- Cabbage moth: hyssop, mint, oregano, rosemary, sage, southernwood, tansy, thyme
- Carrot fly: rosemary, sage
- Flea beetle: mint, catmint (contains nepetalactone, an insect repellent, and can be steeped in water and sprayed on your plants)
- Flies: basil, rue
- Fruit tree moths: southernwood
- Japanese beetles: garlic and rue (when used near roses and raspberries), tansy
- Potato bugs: horseradish
- Mosquitoes: basil, rosemary
- Moths: santolina
- Nematodes: marigold (should be established for at least one year before their nematode deterring properties will take effect)
- Squash bugs and beetles: nasturtium, tansy
- Ticks: lavender (also thought to repel mice and moths)
- Tomato hornworm: borage, pot marigold
- General: winter savory has some insect-repelling qualities
Books for Further Reading
You can explore more about companion planting with these books from Amazon:
- "Great Garden Companions (A Companion-Planting System for a Beautiful, Chemical-Free Vegetable Garden)," by Sally Jean Cunningham, Rodale Organic Living Books
- "Carrots Love Tomatoes," by Louise Riotte, Workman Publishing Company
Article Sources
The Spruce uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
Companion Planting. Cornell University Website
Companion plants for 5 popular crops in the garden - AgroXXI
Friendship between garden plants is also beneficial for the owner of the plot. After all, this way you can optimize the space without the risk that the neighbors will oppress each other, and harvest more from the same bed
Monocultures are much more susceptible to pests and diseases. By increasing biodiversity, you are mimicking nature's ways of minimizing disease and pest attacks.
When choosing a companion bed, always look for non-competing characteristics: plants can have different but complementary growth habits that do not compete with each other. For example, the combination of tall, upright plants with vines close to the ground makes efficient use of garden space. Or a combination of deep-rooted vegetables and shallow-rooted vegetables provides a similar effect.
Second. They should have the same needs for fertilizer, water, or sunlight, making them easier to care for. For example, pairing plants with high water requirements makes it easier to water them all at the same time.
Third. Some plants improve the nutritional value of the soil. Thus, legumes are considered good companions for many plants because they "fix" nitrogen and make it available to neighbors.
Beetroot is a great companion crop because it doesn't take up too much space. Part of the Chenopodiaceae family (along with Swiss chard), it has edible leaves as well as root vegetables.
First, beets are planted in the garden in early spring, and then cabbage seedlings are planted. Since beets naturally loosen the soil, this will be a bonus for seedlings in the neighborhood. In the season, both vegetables catch up with each other and are harvested late.
Dill, onion and garlic are also good choices and can be a natural deterrent to certain pests such as aphids.
Cabbage row lettuce not only provides you with fresh herbs, but also a cover crop that will reduce weed problems, overheat the soil, and decompose into natural compost when cut. In addition, frost-resistant varieties of lettuce can be sown until the end of the season.
Cucumbers are a controversial companion. While some gardeners believe that cabbage will improve the growth of cucumbers, we must remember: cabbage is very moisture-loving and competes for water, which can deprive cucumbers of soil moisture.
Cabbage DOES NOT LIKE being next to tomatoes, peppers and peas.
Carrots
The ability to pair carrots with the right companion plants is an important part of growing healthy and fragrant root crops.
Sowing radish seeds together with carrot seeds is a garden classic. Since radishes germinate faster and are harvested earlier, there is room for carrots to grow.
Planting chives and leeks together with carrots is a smart strategy. Green onions improve flavor and texture while repelling aphids. Leek drives away carrot flies, and carrots, in turn, counteract the onion moth. Planting together will help these plants grow without being damaged by pests.
Cucumber grass (borage), oregano, cilantro and marigolds are universal plants that heal the soil in case of nematodes. From spices it is recommended to plant parsley and rosemary.
Carrots DO NOT LIKE dill as it produces compounds that are harmful to carrot plants and can slow down their growth and development.
Onions
Being a good neighbor in their own right, onions can be grown alongside many crops.
Strawberry is the case when onion friendliness comes in handy. The crops have similar soil requirements as they both benefit from a well-drained bed in full sun. In addition, similar planting schedules allow you to prepare the bed immediately. Onions and new strawberry seedlings can be planted in early spring or, depending on the climate, planted in autumn so that the plants begin to vegetate when spring arrives.
The most important way that strawberries and onions help each other is pest control. Even relatively small green onions smell bright enough to mask the sweet smell of ripe strawberries from animals looking for a juicy treat. Depending on placement, onion stalks can also hide ripe berries from feathered strawberry lovers.
One option is to plant strawberries and onions in alternating rows. Provided there is sufficient soil drainage, planting between strawberry plants is allowed.
Another possibility, especially for small strawberry plots, is to form an onion fence around the perimeter.
Other onion companions: cabbage, potatoes, tomatoes, lettuce.
Onions DO NOT LIKE to grow next to their relatives, as well as with sage, peas, beans and asparagus.
Potato
Potato goes well with plants that are not strong competitors for underground food.
Legumes, celery, marigolds, onions are great for planting next to potatoes. Lettuce and spinach cover the aisles from weeds.
Chamomile, basil, yarrow, parsley and thyme improve the growth and flavor of potatoes and attract beneficial insects to the garden.
Avoid planting potatoes near asparagus, cabbage, carrots, cucumber, kohlrabi, melons, parsnips, rutabagas, squash, sunflowers and turnips.
Tomatoes
Many plants are advertised as improving the health, vitality and flavor of tomatoes. All these characteristics are difficult to measure because there is little scientific research, but there are many options to try in your own garden.
Plants recommended for co-planting with tomatoes include asparagus, basil, beans, peas, borage, marigold, carrots, celery, garlic, kosmeya, lemon balm, nasturtium, onion, parsley and sage.
If there is a problem with red spider mites, then planting tomatoes and garlic together and applying garlic spray will be preventive measures.
Lettuce, as with other neighbors, not only produces a crop when planted in the shade of taller tomato plants, but also provides a living mulch by discouraging weeds.
Gooseberries and roses benefit from being next to tomatoes. The smell of tomatoes repels gooseberry pests, and for roses, the neighborhood is useful against black spot, according to flower growers who prepare such a spray for spraying rose bushes. Place the crushed tomato leaves in a half-liter jar, add water, add a tablespoon of cornstarch and spray on the bushes.
Tomatoes DO NOT LIKE next to nightshade, cabbage, corn and dill.
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Companions to tomatoes for a favorable neighborhood
Compacted plantings benefit the gardener: the soil in the beds is constantly in the shade, which means it does not lose excess moisture and part of the nutrients. In addition, companion plants mutually help each other with food supplies and in the fight against pests. Let's find out what to plant tomatoes next to so that they feel comfortable and give summer residents a generous harvest.
Contents
1. How to plant tomatoes in a greenhouse 2. Neighborhood for tomatoes growing in open ground 3. Unsuitable companions for tomatoestalk about companion plants for tomatoes. Photo by pixabay/Detonator
Tomatoes growing close to other plants in a greenhouse
A tomato greenhouse can bring much more value to diligent gardeners if you choose the right companions for vegetables. In early spring, when it is still too early for the main crop to move into the ground, any early-ripening plants can be planted in it. When the tomatoes have already occupied the allotted living space, it is recommended to plant in the greenhouse those crops that can get along with them in the neighborhood.
Note
If the ground in the greenhouse has been warmed up to positive temperatures as early as the end of March, feel free to plant radishes, onions, pak choi, lettuce, and arugula in it. Before planting tomatoes in greenhouse beds, crops will have time to produce a crop, and they can be harvested.
For greenhouse tomatoes, for healthy growth and comfortable development, it is important to choose the right neighbors. Photo by pixabay/Alexei_other
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- Herbs (basil, thyme, sage, mint) do well with tomatoes if they get enough sunlight. And for the benefit of tomatoes, these herbs repel soil pests;
- Eggplant . together with tomatoes, the purple comrade feels quite comfortable, but it is important to create optimal conditions for him. It is more light, warm and moisture-loving than tomatoes. You can solve the problem and create the necessary microclimate for eggplants by planting them on the sunny side. To add moisture and warmth, shield them from the tomatoes with a wall of cling film. The only disadvantage of such a neighborhood is common pests;
- Strawberry . the requirements for heat and humidity in crops are the same. Both tomatoes and strawberries provide abundant, but not frequent watering. To pollinate the berries, it is enough to keep the greenhouse door open;
- Pepper is friends with tomatoes: they have the same maintenance and care regimen. Plants can be tied to a common trellis. Common pests can be scared away by planting marigolds between them. And the pepper pest, aphids, will be scared away by the aroma of tomato leaves;
- White cabbage is also suitable for planting together with tomatoes. The smell emanating from nightshade is not tolerated by cabbage butterflies: heads of cabbage will not suffer from caterpillars. Wide sockets will shade the ground under the tomatoes from moisture evaporation and reduce the need for vegetables for irrigation;
- Garlic and onion are the main producers of volatile aromas (phytoncides), which are avoided by many pests. For planting next to tomatoes, types of onions that are grown on greens are suitable. Remember that onions are no less light-loving than tomatoes. Spring garlic is also suitable as a companion for the scarlet inhabitants of greenhouses: winter garlic can freeze without snow cover.
By the way
An infusion of broken garlic shoots is a natural prophylactic for spraying Solanaceae against infections and pests.
Pepper is one of the best neighbors for greenhouse tomatoes. Photo by pixabay/Hans
Companion plants for outdoor tomatoes
All crops that are suitable for greenhouse tomatoes can be used as planting compactors for outdoors. In addition, in open-air beds, tomatoes get along well with pumpkin, melon and watermelon. When growing strawberries and tomatoes together, it is better to give preference to tall varieties and choose a planting density so that both crops receive enough sun.
In addition to the above crops, you can also grow next to tomatoes:
- Parsley;
- Asparagus;
- Sorrel;
- Celery;
- Cucumber;
- Phacelia.
Pay attention
Phacelia not only fertilizes and loosens the soil under tomatoes, but also repels nematodes and wireworms.
tomatoes get along next door to a pumpkin. Photo by pixabay/Alexey_Hulsov
Poor choice of neighbors for tomatoes
Dill and fennel have no place next to tomatoes. Cucumbers are also best planted separately. They do not harm tomatoes in any way, but they have noticeably different conditions of detention. Cucumbers should be hot and humid, excessive heat and moisture only harm tomatoes: heat affects the pollination process, and moisture contributes to infections.
Peas and tomatoes have no evidence against neighborhood: legumes, on the contrary, accumulate soil nitrogen. But at the initial stage of growth, they will deprive the tomatoes of sunlight, and then the tomatoes will take it away from the legumes. The tenacious tendrils of peas can damage young seedlings until their stems are strong.