The best flowers to plant with tomatoes are those that attract beneficial insects, deter pests, and improve soil health. Marigolds, nasturtiums, and basil are excellent choices, offering a range of benefits from pest repulsion to attracting pollinators, ultimately leading to a healthier tomato harvest.

Companion Planting for Healthier Tomatoes: What Flowers Should You Grow?

Growing tomatoes is a rewarding experience, but did you know that the plants around them can significantly impact their health and yield? Companion planting, the practice of growing different crops together for mutual benefit, is a time-honored gardening technique. When it comes to tomatoes, selecting the right companion flowers can be a game-changer. These floral allies can help deter pests, attract beneficial insects, and even improve soil conditions, leading to more robust plants and a bountiful harvest.

Why Companion Planting Matters for Your Tomato Plants

Tomatoes are susceptible to various pests and diseases. Certain flowers act as natural deterrents, confusing or repelling common tomato adversaries like aphids, whiteflies, and even nematodes. Simultaneously, other flowers draw in helpful insects such as ladybugs and lacewings, which prey on these harmful pests. This creates a more balanced and resilient garden ecosystem, reducing the need for chemical interventions.

Top Flower Choices to Pair with Tomatoes

Several flower varieties stand out for their positive impact on tomato growth. These aren’t just pretty additions; they are functional partners in your garden.

Marigolds: The Pest-Repelling Powerhouse

Marigolds are perhaps the most well-known companion plant for tomatoes. Their roots release thiophene, a chemical compound that is known to repel root-knot nematodes, microscopic worms that can severely damage tomato roots. The strong scent of marigolds also helps to deter other common garden pests like aphids and whiteflies.

• Benefits: Nematode control, aphid deterrence, general pest repulsion.
• Varieties: French marigolds (Tagetes patula) and African marigolds (Tagetes erecta) are both effective.
• Planting Tip: Plant them around the base of your tomato plants or interspersed throughout the garden bed.

Nasturtiums: The Trap Crop and Beneficial Attractor

Nasturtiums serve a dual purpose. They can act as a trap crop, luring aphids away from your tomato plants onto their own leaves. This allows you to easily manage the aphid population. Additionally, nasturtiums attract pollinators like bees, which are crucial for tomato fruit set.

• Benefits: Aphid trap crop, attracts pollinators, deters some beetles.
• Varieties: Bush or climbing varieties can be used.
• Planting Tip: Plant them at the edge of your tomato beds or a short distance away to draw pests.

Basil: The Flavor Enhancer and Pest Deterrent

While often thought of as an herb, basil is a flowering plant and an exceptional companion for tomatoes. Its strong aroma is known to repel flies and mosquitoes. Some gardeners also believe that basil improves the flavor of tomatoes, though this is largely anecdotal. It also attracts bees, aiding in pollination.

• Benefits: Repels flies and mosquitoes, attracts bees, potential flavor enhancement.
• Varieties: Sweet basil, Genovese basil, and lemon basil are popular choices.
• Planting Tip: Plant basil directly in the tomato bed, allowing its scent to mingle with the tomato plants.

Calendula: The Beneficial Insect Magnet

Calendula, also known as pot marigold, is a cheerful addition that brings a host of benefits. It attracts beneficial insects like ladybugs, hoverflies, and parasitic wasps, all of which are natural predators of common garden pests. Calendula can also help improve soil aeration with its taproot.

• Benefits: Attracts ladybugs and hoverflies, deters nematodes, improves soil.
• Varieties: Pot marigold (Calendula officinalis) is widely available.
• Planting Tip: Sow seeds directly in the garden or transplant seedlings around your tomatoes.

Other Beneficial Flowers and Herbs

Beyond the top choices, several other plants can complement your tomato garden:

• Borage: Attracts bees and beneficial insects, and is said to deter tomato hornworms. Its leaves can also be added to compost.
• Chives: Their oniony scent can deter aphids and other pests. They also attract pollinators.
• Petunias: While primarily ornamental, some gardeners find they deter tomato hornworms and aphids.

What to Avoid Planting Near Tomatoes

Just as some plants benefit tomatoes, others can hinder their growth. It’s generally advised to avoid planting members of the nightshade family too close to tomatoes, as they share common pests and diseases. This includes:

• Potatoes
• Peppers
• Eggplant

These plants can compete for nutrients and increase the risk of soil-borne diseases affecting your tomato crop.

Creating Your Companion Planting Plan

When planning your garden, consider the spacing and needs of each plant. Ensure that companion flowers don’t overshadow or compete excessively with your tomato plants for sunlight, water, or nutrients. A good rule of thumb is to plant companion flowers around the perimeter of your tomato patch or every few tomato plants.

A successful companion planting strategy involves understanding the unique contributions of each plant. By strategically incorporating flowers like marigolds, nasturtiums, and basil, you create a more resilient and productive tomato garden, naturally deterring pests and inviting beneficial wildlife.

People Also Ask

### What is the fastest-growing flower to plant with tomatoes?

For quick results, nasturtiums are an excellent choice as they germinate and grow rapidly from seed, often flowering within a few weeks. This means they can start providing benefits like aphid trapping and pollinator attraction relatively quickly, supporting your tomatoes throughout their growing season.

### Can I plant zinnias with tomatoes?

Yes, zinnias can be a good companion plant for tomatoes. They are known to attract pollinators like butterflies and bees, which can help with the pollination of your tomato flowers, leading to better fruit development. Zinnias also add a splash of vibrant color to the garden.

### Do sunflowers deter pests from tomatoes?

Sunflowers are not typically recommended as a direct companion plant for tomatoes. While they attract pollinators, their large size can shade out tomato plants, and they are heavy feeders, potentially competing for nutrients. Some anecdotal evidence suggests they might deter certain pests, but their negative impacts often outweigh potential benefits.

### What herbs are best to plant with tomatoes?

Besides basil, other beneficial herbs to plant with tomatoes include chives, parsley, and mint. Chives help deter aphids, parsley attracts beneficial insects, and mint can repel pests, though it’s best planted in containers to prevent it from spreading aggressively and taking over your garden space.

### How far apart should I plant companion flowers from tomatoes?

Generally, planting companion flowers about 6-12 inches away from your tomato plants is sufficient. This proximity allows for interaction and mutual benefits without causing competition for resources like sunlight, water, and nutrients. For larger flowers