Agriculture / What is The Best Companion Plant for Tomatoes?

What is The Best Companion Plant for Tomatoes?

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Written by Jeffrey Espinoza

As a horticulturist deeply rooted in the practice of organic gardening, I often encounter the question, “What is the best companion plant for tomatoes?” Companion planting, a cornerstone of sustainable agriculture, involves positioning plants together to benefit each other in various ways.

Tomato plants, with their susceptibility to pests like the tomato hornworm and spider mites, can greatly benefit from having the right plant partners. Certain companion plants can attract beneficial insects such as parasitic wasps and pollinators, which help in controlling pests and improving tomato crop pollination.

Additionally, selecting the best tomato companion plants can lead to healthier soil and stronger tomato roots, enhancing the overall vitality of your tomato garden.

Among the myriad of options for tomato companion planting, basil and marigold stand out as excellent choices.


As we gently transition from the broader concepts of organic gardening, let’s delve into the fragrant world of basil. This humble herb not only elevates our culinary experiences but also stands as a sentinel in the vegetable garden, particularly alongside tomato plants. Basil acts as an excellent companion plant, weaving a symbiotic tapestry with tomatoes. It’s said that basil can improve the flavor of tomatoes, making it one of the best companion plants for those seeking to enhance their tomato crop.

Companion planting with basil does more than just flavor enhancement; it serves as a beacon for beneficial insects, including parasitic wasps and pollinators, while deterring harmful insects such as spider mites, flea beetles, and even the dreaded tomato hornworm. This balance of attracting beneficial insects while repelling pests is a cornerstone of successful gardening, reducing the need for chemical pest control.

Moreover, basil and tomatoes share similar growing conditions, making them ideal plant partners. This harmony extends below the soil, where basil is believed to help repel pests that target tomato roots, further safeguarding the health of the tomato garden.


As we transition from the aromatic allure of basil to the vibrant world of marigolds, it’s worth noting that these sunny blooms are not just a feast for the eyes. Marigolds are heralded as one of the best tomato companion plants, offering a plethora of benefits that extend well beyond their ornamental value. The practice of companion planting tomatoes with marigolds can significantly enhance the growth and health of your vegetable garden.

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Marigolds are exceptional in repelling pests, attracting beneficial insects like parasitic wasps and pollinators, and even in preventing fungal diseases. Their ability to deter pests such as the flea beetle, the asparagus beetle, and the cabbage moth makes them an invaluable addition to any tomato bed. Furthermore, these flowers are great companion plants for a variety of other vegetables, including carrots, enhancing the overall biodiversity and pest control within the garden bed.

Incorporating marigolds into your gardening strategy isn’t just about pest management; it’s about creating a more vibrant, healthy, and productive garden.


As we transition from the vibrant hues of marigolds, let’s delve into the world of nasturtiums, another powerhouse in the realm of gardening. Nasturtiums are not only known for their bright, edible flowers but also for their prowess in companion planting with tomato plants. They are among the best companion plants, serving as a magnet for beneficial insects while deterring pests.

In the context of companion planting tomatoes, nasturtiums play a crucial role. They attract parasitic wasps and beneficial pollinators, which are vital for pollinating plants and controlling pests, such as the asparagus beetle and cabbage moth, without the need for chemical interventions. Nasturtiums, being excellent companion plants, contribute to a healthier tomato bed by repelling pests and attracting pollinators that are crucial for growing tomatoes.

Moreover, nasturtiums serve as a barrier against various pests, including tomato pests, by emitting a scent that pests find unappealing. This natural repellent aspect makes them a great companion plant, especially when integrated into a garden bed or planting guide focused on tomatoes.


Transitioning from the vibrant hues and peppery flavors of nasturtiums, let’s delve into another essential aspect of our gardens: garlic. Not only is garlic a culinary staple, but it also plays a pivotal role in companion planting, particularly with tomato plants. This practice enriches our gardening endeavors by fostering a symbiotic environment where plants can thrive together.

Garlic acts as a formidable ally in repelling pests and attracting beneficial insects. When positioned near tomato plants, garlic helps deter tomato pests and even certain harmful insects, making it an indispensable tomato companion in your garden. The aroma of garlic is known to discourage pests, while its presence can attract parasitic wasps and beneficial pollinators, which are crucial for managing insect pest populations and enhancing pollination.

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Moreover, garlic’s role extends beyond just being a tomato companion. Its strong scent is effective in repelling pests from a variety of plants, making it a versatile choice for companion planting.


As we transition from the pungent allure of garlic to the vibrant world of borage, it’s worth noting how these plants can significantly enhance our gardening endeavors, particularly with tomato plants. Borage, with its star-shaped blue flowers, is not only a feast for the eyes but also a powerhouse in companion planting strategies. When nestled among tomato plants, borage works wonders by repelling certain insect pests and attracting beneficial insects such as parasitic wasps, which are natural predators of many garden nuisances.

Moreover, the practice of companion planting with borage and tomato plants serves a dual purpose; it promotes healthier growth and deters fungal diseases. This is particularly important for gardening enthusiasts looking to yield a bountiful harvest of tomatoes without the heavy reliance on chemical interventions. Borage is known for its ability to repel pests and improve the overall plant vigor of tomato plants, making it an essential part of any tomato companion planting guide.

Furthermore, the presence of borage in your garden can attract pollinators, enhancing the pollination of your tomato plants and other companion plants.


Transitioning from the lush foliage of borage, let’s delve into the underground marvels of carrots and their surprising relationship with tomato plants. As a horticulturist, I’ve observed the symbiotic magic that unfolds through companion planting, where carrots and tomato plants thrive together, showcasing nature’s own method of mutual support.

Carrots, with their deep roots, can break through the soil, making it more pliable for the somewhat shallower roots of tomato plants. This underground teamwork is not just about space sharing; it’s about creating a healthier environment for both crops. Moreover, the presence of carrots can help deter parasitic wasps, which are often a nuisance around tomato plants.

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Incorporating carrots as companion plants in your garden is a subtle art of balance and timing. While growing tomatoes, it’s essential to consider that each has its season and space requirements. The strategic placement of carrots alongside tomato plants can enhance the growth of both, making them excellent companion plants.


As we transition from the vibrant hues of carrots to the diverse world of peppers, let’s spice things up a bit. Peppers, with their array of colors, shapes, and flavors, are a joy to cultivate. A fascinating aspect of growing these vibrant fruits is the concept of companion planting. Just as carrots have their preferred neighbors, peppers thrive when paired with the right companions.

Among the most beneficial companions for peppers are tomato companion plants. This alliance is not only visually appealing but also fosters a supportive environment for both. The presence of certain tomato companions can improve the overall health and yield of your pepper plants. Utilizing up to five different tomato companion plants can significantly enhance your garden’s biodiversity, leading to a more resilient and productive ecosystem.

Companion plants serve multiple roles, including attracting beneficial organisms that aid in the health and growth of your peppers. It’s worth mentioning that a specific tomato companion can also act as a natural deterrent to common challenges faced by peppers, creating a harmonious balance in your garden.


In the realm of horticulture, aligning the cultivation of certain flora in proximity to one another can significantly bolster growth and yield. Among these, a select few have emerged as particularly synergistic when positioned near your solanaceous fruits. Notably, basil, marigolds, nasturtiums, garlic, borage, carrots, and peppers stand out for their supportive roles. These allies not only contribute to a more robust development but also add a layer of vibrancy and diversity to the garden.

The practice of strategically placing these allies in your garden can be an effective measure to enhance overall health and productivity. Employing these tomato companion plants up to three times within your garden layout can create a more resilient and flourishing ecosystem.