Plant Cultivation

What Grows Well with Tomatoes?

Tomato Companion Plants

Companion planting is an ancient gardening technique that involves growing different plants together to create a mutually beneficial relationship. When it comes to tomatoes, finding the right companions can significantly enhance tomato growth, health, and yield. By selecting plants that complement tomatoes, gardeners can deter pests, improve soil fertility, and even enhance the flavor of their harvest.

In this guide, we’ll focus on what grows well with tomatoes. Meanwhile, we’ll provide practical tips and insights to help you create a thriving and harmonious garden. Whether you’re a beginner or a seasoned gardener, understanding the principles of companion planting for tomatoes is a valuable step towards achieving your goals.

Table of Contents

Benefits of Companion Plants for Tomatoes

Tomato companion plants can bring many benefits, such as enhanced pest control, improved soil health, and increased pollination, all of which contribute to a more vibrant and productive garden.

Benefits of Companion Plants for Tomatoes

Benefits of Companion Plants for Tomatoes

Here are the possible benefits that tomato companion plants can bring to you.

  • Pest Control: Repel harmful insects and attract beneficial ones.
  • Soil Improvement: Enhance soil structure and nutrient availability.
  • Pollination: Attract pollinators to improve fruit set.
  • Weed Suppression: Acts as a living mulch to reduce weed growth.
  • Flavor Enhancement: Improve the taste of tomatoes.
  • Space Utilization: Maximize garden space and increase overall yield.
  • Disease Prevention: Reduce the spread of diseases through better air circulation and natural pest control.

What Grows Well with Tomatoes?

If you are a tomato grower, selecting the right companion plants can significantly enhance the health, growth, and yield of your tomato plants. 

In this part, we’ll demonstrate the best companion plants for tomatoes and figure out how each companion plant for tomatoes.

Vegetables to Grow with Tomatoes

Vegetables to Grow with Tomatoes

Vegetables to Grow with Tomatoes

  • Asparagus: Asparagus and tomatoes support each other by repelling each other’s pests. Tomatoes release solanine to deter asparagus beetles, while asparagus secretes compounds that repel root-knot nematodes.
  • Basil: Basil is one of the best companions for tomatoes. Growing basil can increase the plant's root size and lead to a greater crop of fruit. The smell of basil can also help to repel pests.
  • Beans: Bush beans interplanted with tomatoes decrease disease. They also fix nitrogen in the soil, which benefits tomatoes.
  • Borage: Borage attracts the parasitic wasp that attacks aphids and tomato hornworms. It also attracts pollinators and enhances tomato growth, taste, and disease resistance.
  • Carrots: Carrots grow well with tomatoes and can help loosen the soil, making it easier for tomato roots to spread.
  • Celery: Celery can help repel pests and improve the health of tomato plants.
  • Garlic: It's worth growing garlic. Garlic repels pests with its strong scent and has antibacterial and antifungal properties that can protect tomato plants from soil-borne diseases.
  • Onions: Onions emit strong odors that can repel various tomato pests, including aphids, thrips, and whiteflies.
  • Parsley: Parsley attracts beneficial insects that protect and pollinate tomatoes. Plant these herbs between tomatoes.
  • Radish: Radish works as a trap crop for flea beetles, a pest of young tomato seedlings.

Flowers to Grow with Tomatoes

Flowers to Grow with Tomatoes

Flowers to Grow with Tomatoes

  • Calendula: Calendula repels tomato pests and attracts beneficial insects. It can also act as a trap crop for aphids.
  • Cosmos: Cosmos attracts beneficial insects like ladybugs and hoverflies, which prey on aphids and other pests.
  • Lavender: Lavender flowers draw in bumble bees, which practice buzz pollination. The scent of lavender also repels whiteflies, spider mites, flea beetles, and nematodes.
  • Marigolds: Marigolds release a compound called pyrethrum that repels moths that lay tomato hornworm eggs. They also reduce root-knot nematode populations.
  • Nasturtiums: Nasturtiums deter pests while attracting pollinators. They can also act as a trap crop for aphids.
  • Sunflowers: Sunflowers attract native bees, including bumble bees, to encourage tomato pollination. Many varieties are also visited by small birds who feed on insect pests in the garden.
  • Zinnias: Zinnias bring more color to the garden and attract pollinators and predators. They come in various colors and are highly effective at drawing in beneficial insects.

What Should Tomatoes Not be Planted Next To?

Despite companion plants for tomatoes, you should also learn what vegetables, flowers, and herbs should not be planted next to.

What Should Tomatoes Not be Planted Next To?

What Should Tomatoes Not be Planted Next To?

Vegetables

  • Cucumbers: Both cucumbers and tomatoes are susceptible to similar diseases like cucumber mosaic virus and phytophthora blight, which can spread between them. Additionally, cucumbers have high water needs and can increase the risk of fungal diseases.
  • Cole crops (Brassica family): This includes broccoli, Brussels sprouts, cabbage, cauliflower, collards, ornamental kale, and kohlrabi. These plants compete with tomatoes for nutrients and can stunt their growth.
  • Potatoes: As a nightshade, like tomatoes, potatoes are susceptible to the same pests and diseases, including early and late blight. They also compete for soil nutrients.
  • Eggplant: Another nightshade, eggplant can spread blight and other diseases to tomatoes. They also compete for nutrients.
  • Corn: Corn attracts the corn earworm, which is the same pest as the tomato fruitworm. Growing them together can increase pest problems.
  • Broccoli and Cauliflower: These heavy feeders compete with tomatoes for nutrients, leading to stunted growth and reduced yields.

Herbs

  • Dill: Mature dill plants can inhibit tomato growth and attract tomato hornworms.
  • Fennel: Fennel releases allelopathic chemicals that inhibit the growth of tomatoes and other plants.

Flowers

  • Walnuts: Walnut trees release chemicals in the soil that can stunt the growth of surrounding plants, including tomatoes.

Tricks About Growing Tomatoes

By the end of the post, we’ll answer several FAQs about tomato growing tricks. 

How much light do tomatoes need?

Tomatoes need 6 to 8 hours of direct sunlight per day for optimal growth and fruit production. If you're growing tomatoes indoors or in areas with insufficient natural light, LED grow lights are a great solution. For mature plants, set full-spectrum LED grow lights on a timer for 14 to 16 hours per day, and position them about 6 to 12 inches (15 to 30 cm) from the plants. For young seedlings, provide 18 to 22 hours of supplemental lighting from LED grow lights. Ensure the lights are close enough to meet the plants' light intensity needs but not so close as to cause stress.

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2026 Newest Version Spider Farmer® SF1000D 100W Full Spectrum Dimmable LED Grow Light For 2×2′

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Samsung lm301H EVO PPE: 2.5 µmol/J (Highest efficiency 3.14 μmol/j single diode) Max Coverage:  2′X2′ Grow Tent Compatible: 2'X2' Recommended Fan Size: 4-Inch <<SF1000 Full Complete Grow Tent Kits--Check More

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Samsung lm301H EVO PPE: 2.7 µmol/J (Highest efficiency 3.14 μmol/j single diode) Diodes: Samsung lm301H EVO Max Coverage: 3′X3′ Grow Tent Compatible: 3'X3' Recommended Fan Size: 4-Inch Buy the SF2000Pro + GGS Controller Kit ($205.99)— for just $30 more, you’ll get the GGS controller, sensors, and other add-ons.
Enjoy remote control, sunrise/sunset simulation, and overheat protection for your lights, helping you maximize yields. The SF2000 Pro is a premium LED grow light that is specifically engineered for square planting spaces. In contrast, the SF2000 is optimized for rectangular planting spaces.

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Buy the Light + GGS Controller Kits and enjoy unbeatable discounts! Our GGS Controller lets you simulate sunrise and sunset for your SF series light, with remote control via the app and built-in high-temperature protection. Plus, the kit includes a temperature and humidity sensor, allowing you to track historical records on the app. This controller is also compatible with our RJ12-equipped inline fan, clip fan, heater, and other devices, ensuring your grow tent maintains the perfect environment for your plants at all times. Samsung lm301H EVO PPE: 2.7 µmol/J (Highest efficiency 3.14 μmol/j single diode) Coverage: 2′X4′ Grow Tent Compatible: 2’X4′ Recommended Fan Size: 4-Inch Optional Controller: Spider Farmer Controller (Bring your indoor garden to the next level with new-age automation) The kit includes:
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  • 1x Power Cord
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  • 2x Rope Ratchets
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  • 1 × GGS light adapter (for connecting the lights to the GGS System)
  • 1 × GGS Pro adapter (10 ports for expanding connections)
  • 4 × 2.5m RJ12 cables (for connecting devices)
  • 2 × 0.25m RJ12 cable
  • 4 x hook and loop straps (for organizing cables)

SF2000pro LED Grow Light & GGS Smart Controller Bundle – | 200W Samsung LM301H EVO | 3×3′ Coverage

Original price was: $235.98.Current price is: $205.99.
Buy the Light + GGS Controller Kits and enjoy unbeatable discounts! Our GGS Controller lets you simulate sunrise and sunset for your SF series light, with remote control via the app and built-in high-temperature protection. Plus, the kit includes a temperature and humidity sensor, allowing you to track historical records on the app. This controller is also compatible with our RJ12-equipped inline fan, clip fan, heater, and other devices, ensuring your grow tent maintains the perfect environment for your plants at all times. Samsung lm301H EVO PPE: 2.7 µmol/J (Highest efficiency 3.14 μmol/j single diode) Diodes: Samsung lm301H EVO Max Coverage: 3′X3′ Grow Tent Compatible: 3'X3' Recommended Fan Size: 4-Inch The SF2000 Pro is a premium LED grow light that is specifically engineered for square planting spaces. In contrast, the SF2000 is optimized for rectangular planting spaces. The kit includes:
  • 1x SF2000pro EVO LED Grow Light (with dimmer box)
  • 1x Power Cord
  • 2x Hanging Kits
  • 2x Rope Ratchets
  • 1 × GGS controller (with power supply)
  • 1 × GGS temperature and humidity sensor
  • 1 × GGS light adapter (for connecting the lights to the GGS System)
  • 1 × GGS Pro adapter (10 ports for expanding connections)
  • 4 × 2.5m RJ12 cables (for connecting devices)
  • 2 × 0.25m RJ12 cable
  • 4 x hook and loop straps (for organizing cables)

SF4000 LED Grow Light & GGS Smart Controller Bundle – | 450W Samsung LM301H EVO | 4×4’/5×5′ Coverage

Original price was: $385.98.Current price is: $345.99.
Buy the Light + GGS Controller Kits and enjoy unbeatable discounts! Our GGS Controller lets you simulate sunrise and sunset for your SF series light, with remote control via the app and built-in high-temperature protection. Plus, the kit includes a temperature and humidity sensor, allowing you to track historical records on the app. This controller is also compatible with our RJ12-equipped inline fan, clip fan, heater, and other devices, ensuring your grow tent maintains the perfect environment for your plants at all times. Samsung lm301H EVO PPE: 2.7 µmol/J (Highest efficiency 3.14 μmol/j single diode) Coverage: 4′X4′ Grow Tent Compatible: 4’X4′ Recommended Fan Size: 6-Inch The kit includes:
  • 1x SF4000 LED Grow Light (with dimmer box)
  • 1x Power Cord
  • 4x YOYO Hanger Hook
  • 1 × GGS controller (with power supply)
  • 1 × GGS temperature and humidity sensor
  • 1 × GGS light adapter (for connecting the lights to the GGS System)
  • 1 × GGS Pro adapter (10 ports for expanding connections)
  • 4 × 2.5m RJ12 cables (for connecting devices)
  • 2 × 0.25m RJ12 cable
  • 4 x hook and loop straps (for organizing cables)

What is the best fertilizer for tomatoes?

The best fertilizer for tomatoes is one that meets the specific nutrient needs of your soil and plants. Ideally, you can use organic materials to support long-term soil health.

  1. Soil Test: Before adding any fertilizer, it's crucial to test your soil to understand its nutrient levels and pH. This will help you choose the right fertilizer for your specific needs.
  2. Organic vs. Chemical Fertilizers: Organic fertilizers are generally preferred for tomatoes as they improve soil health and support beneficial soil microbes. Examples include compost, blood meal, bone meal, and kelp meal. Chemical fertilizers can be effective but may hurt soil biology over time.
  3. Nutrient Needs: Tomatoes require a balanced supply of nitrogen (N), phosphorus (P), and potassium (K), along with calcium to prevent blossom end rot. For example, Espoma Organic Tomato-Tone (3-4-6) is highly rated for its effectiveness and organic content.
  4. Application Timing: Fertilize tomatoes at different stages:
  • Transplanting: Add compost and organic fertilizers like blood meal and kelp meal to the planting hole.
  • Side Dressing: Apply additional fertilizer when fruit begins to develop. A common recommendation is to use a 5-10-5 fertilizer.
  • Container Tomatoes: Use slow-release fertilizer pellets at planting time and supplement with water-soluble fertilizer every few weeks.
  • Supplementary Nutrients: Calcium is crucial for preventing blossom end rot. Foliar sprays and fertigation can help ensure adequate calcium uptake.

Why should you sprinkle baking soda around your tomato plants?

Yes, you can sprinkle baking soda around your tomato plants. There are many benefits it can offer:

  • Help neutralize overly acidic soil, creating a more favorable environment for tomato growth. Tomatoes prefer a slightly acidic to neutral soil pH (6.0-6.8), and baking soda, being alkaline, can adjust the pH to this optimal range.
  • This adjustment can improve nutrient absorption, potentially leading to sweeter tomatoes. Baking soda acts as a natural fungicide, preventing fungal diseases like powdery mildew and late blight.     
  • It also deters pests such as slugs, ants, and aphids. 

However, it’s also important to use baking soda sparingly to avoid raising the soil pH too high, which can be detrimental to the plants.

Should I sprinkle coffee grounds around my tomato plants?

You can sprinkle coffee grounds around your tomato plants, but some important considerations exist. Coffee grounds contain nutrients like nitrogen, potassium, and phosphorus, which can be beneficial for tomato plants. However, they should be used in moderation to avoid making the soil too acidic or compacting it, which can hinder water and air penetration. 

The best way to use coffee grounds is to compost them first, as this allows the nutrients to break down and become more available to the plants. If you choose to apply coffee grounds directly, use a thin layer and mix them into the soil to prevent compaction and ensure even nutrient distribution. Additionally, while some gardeners believe coffee grounds can deter pests, this effect is not well-supported by scientific evidence.

Are Epsom salts good for tomatoes?

Yes, Epsom salts can be beneficial for tomatoes. Primarily, it’s because they provide magnesium, an essential nutrient for healthy plant growth. Magnesium helps in the formation of chlorophyll, which is crucial for photosynthesis, and it also aids in the absorption of other nutrients. A lack of magnesium can lead to yellowing leaves and reduced fruit production. To use Epsom salts, dissolve about 1 tablespoon in a gallon of water and apply it to the soil around your tomato plants every two weeks. This can help prevent magnesium deficiency and promote robust growth. 

However, it's important to avoid over-application, as excessive magnesium can lead to other nutrient imbalances. Always monitor your plants for signs of deficiency or excess and adjust your fertilization practices accordingly.

Conclusion

Tomato companion plants offers a wealth of benefits. They’re expected to enhance the health, productivity, and overall vitality of your tomato plants. By strategically placing certain plants near tomatoes, you can create a symbiotic relationship that deters pests, improves soil health, attracts beneficial insects, and even enhances the flavor of the tomatoes

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About Amy

Amy‘s been writing SEO articles for over 4 years. Before turning her focus to indoor gardening, she served in the IT industry, writing a lot to help users overcome tech issues. As a professional SEO writer, Amy's developed a keen eye for crafting informative content that drives traffic and boosts search engine rankings for her clients.

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