What flowers should I plant next to tomatoes?
When choosing flowers to plant alongside tomatoes, select varieties that offer companion planting benefits like pest deterrence or improved soil health. Good options include marigolds, nasturtiums, basil, and borage, all of which can help your tomato plants thrive.
Companion Planting for Tomatoes: Boosting Your Garden’s Health
Tomatoes are a garden favorite, but they can be susceptible to pests and diseases. Fortunately, strategic planting of certain flowers and herbs can significantly improve their health and yield. Companion planting is an age-old gardening technique that leverages the natural relationships between different plants to create a more resilient and productive ecosystem.
Why Plant Flowers Next to Tomatoes?
The benefits of companion planting extend beyond just aesthetics. Certain flowers act as natural pest repellents, while others attract beneficial insects that prey on tomato pests. Some plants can even improve soil structure and nutrient availability for your tomato plants.
Deterring Unwanted Pests
Many common garden pests, such as aphids, whiteflies, and tomato hornworms, can wreak havoc on tomato plants. Flowers like marigolds are renowned for their ability to deter nematodes in the soil and repel other flying insects. Their strong scent can confuse pests, making it harder for them to locate your tomato plants.
Attracting Beneficial Insects
While some flowers deter pests, others act as magnets for beneficial insects. Nasturtiums, for instance, can act as a trap crop for aphids, drawing them away from your tomatoes. They also attract pollinators like bees, which are crucial for fruit development.
Improving Soil Health and Nutrient Uptake
Some companion plants can help improve the soil around your tomatoes. Borage, with its deep taproot, can break up compacted soil and bring up nutrients from deeper layers. It is also believed to enhance the flavor and growth rate of tomatoes.
Top Flower and Herb Companions for Tomatoes
Selecting the right companions is key to a successful tomato patch. Here are some of the most effective choices:
Marigolds (Tagetes spp.)
Marigolds are a superstar companion for tomatoes. Their roots release thiophene, a substance that repels root-knot nematodes. The strong fragrance of their flowers also deters other common garden pests.
- Benefits: Nematode control, general pest deterrence.
- Planting Tip: Plant marigolds around the base of your tomato plants or interspersed throughout the garden bed.
Nasturtiums (Tropaeolum majus)
Nasturtiums are excellent at attracting aphids away from tomato plants, acting as a sacrifice crop. They also attract beneficial insects like hoverflies and ladybugs, which are natural predators of aphids.
- Benefits: Aphid trap crop, attracts beneficial insects.
- Planting Tip: Allow nasturtiums to spill over the edges of raised beds or plant them at the end of tomato rows.
Borage (Borago officinalis)
Borage is a fantastic herb that benefits tomatoes in multiple ways. It attracts pollinators, deters tomato hornworms and cabbage worms, and its deep roots improve soil aeration. The leaves are also edible and can be added to salads or drinks.
- Benefits: Attracts pollinators, deters hornworms, improves soil.
- Planting Tip: Plant borage a little distance away from tomatoes, as it can grow quite large.
Basil (Ocimum basilicum)
While an herb, basil is often grown alongside flowers and is a classic tomato companion. It is believed to deter tomato hornworms and whiteflies, and some gardeners swear it improves tomato flavor.
- Benefits: Deters hornworms and whiteflies, may improve flavor.
- Planting Tip: Plant basil in the same bed as your tomatoes for easy harvesting and mutual benefit.
Calendula (Calendula officinalis)
Calendula, also known as pot marigold, is another beneficial flower. It attracts pollinators and beneficial insects like ladybugs, which help control aphid populations. It can also help improve soil health.
- Benefits: Attracts pollinators and beneficial insects.
- Planting Tip: Plant calendula at the edges of your tomato patch.
Flowers to Avoid Planting Near Tomatoes
Just as some plants are beneficial, others can hinder tomato growth. It’s generally advised to avoid planting tomatoes near members of the brassica family (cabbage, broccoli, cauliflower) as they can compete for nutrients and may stunt tomato growth. Also, avoid planting fennel near tomatoes, as it is known to inhibit the growth of many plants.
Creating Your Companion Planting Plan
When planning your garden, consider the mature size of each plant and their specific needs. A well-designed companion planting strategy ensures that each plant supports the others.
| Companion Plant | Primary Benefit(s) for Tomatoes | Potential Drawbacks |
|---|---|---|
| Marigolds | Pest deterrence, nematode control | Can attract spider mites in some conditions |
| Nasturtiums | Aphid trap crop, attracts pollinators | Can become invasive if not managed |
| Borage | Pollinator attraction, pest deterrence | Can self-seed readily |
| Basil | Pest deterrence, potential flavor enhancement | Can be susceptible to slugs |
| Calendula | Attracts beneficial insects, soil improvement | Generally few drawbacks |
Frequently Asked Questions About Tomato Companions
What is the best flower to plant with tomatoes for pest control?
The marigold is widely considered one of the best flowers for tomato pest control. Its roots release compounds that deter root-knot nematodes, and its strong scent repels various flying insects that might otherwise damage your tomato plants.
Can I plant zinnias next to my tomatoes?
Yes, zinnias can be a good companion for tomatoes. They attract pollinators like bees and butterflies, which can help with tomato fruit set. Zinnias are generally not known to have negative interactions with tomatoes and add vibrant color to the garden.
Are sunflowers bad for tomatoes?
Sunflowers can be problematic for tomatoes due to their allelopathic nature. They release chemicals from their roots that can inhibit the growth of nearby plants, including tomatoes. It’s best to plant sunflowers a significant distance away from your tomato patch.
Should I plant petunias with my tomatoes?
Petunias are generally considered neutral or slightly beneficial companions for tomatoes. They can attract pollinators and some beneficial insects. They don’t typically compete aggressively for resources and can add a splash of color without harming your tomato plants.
What herbs are good companions for tomatoes?
Besides basil, other excellent herb companions for tomatoes include parsley, chives, and mint (though mint should be planted in containers to prevent it from spreading aggressively). These herbs can deter pests and attract beneficial insects, contributing to a healthier garden ecosystem.
By thoughtfully integrating these flowering companions into your tomato garden, you can create a more robust, pest-resistant, and productive growing environment. Happy gardening!
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