What Not to Grow Near Tomato Plants

Want to level up your tomato game this year? You've got the right fertilizer, you're pruning like a pro, and you're watering diligently. But there's a sneaky culprit that could be sabotaging your harvest: your garden companions.

Companion planting is a powerful tool, but it's a two-way street. Just as some plants boost your tomatoes' growth and flavor, others can hinder them, leading to smaller yields, disease, and generally unhappy tomato plants. By understanding which plants to keep away from your precious tomatoes, you can create a thriving garden ecosystem that maximizes your harvest.

Before you plant another seed, consider this: rotate your crops! Don't plant tomatoes in the same spot year after year, and especially not after growing something on the "avoid" list. Crop rotation helps prevent soilborne diseases from building up and ensures your tomatoes have access to fresh nutrients.

The "No-No" Neighbors for Your Tomatoes

Knowing whatnotto plant near your tomatoes is just as crucial as knowing what to plant. These plants can compete for resources, attract pests, or even inhibit growth. Let's dive into the list of offenders: Brassicas (Cabbage, Broccoli, Cauliflower, Kale, Brussels Sprouts):These plants are heavy feeders, meaning they suck up a lot of nutrients from the soil, leaving less for your tomatoes. They also release chemicals into the soil that can inhibit tomato growth.

Fennel: Fennel is notorious for inhibiting the growth of many plants, tomatoes included. It releases allelopathic chemicals that can stunt the growth of nearby plants. Its strong anise-like scent also attracts aphids, which can then move on to your tomatoes.

Corn: While corn and tomatoes might seem like a classic summer combination, they compete fiercely for nutrients and sunlight. Taller corn stalks can shade your tomato plants, reducing their access to the sun they need to produce juicy fruit.

Potatoes: Both tomatoes and potatoes belong to the nightshade family, making them susceptible to similar diseases like early and late blight. Planting them together increases the risk of disease spreading and decimating both crops. They also compete for the same nutrients in the soil.

Walnut Trees (Black Walnut in particular): Walnut trees, especially Black Walnut, release a chemical called juglone into the soil. Juglone is toxic to many plants, including tomatoes. Even if you don't plant your tomatoes directly under a walnut tree, juglone can leach into the surrounding soil and affect their growth.

Rosemary: While rosemary is a wonderful herb to have in the garden, it can attract spider mites, which are a major pest for tomato plants.

Eggplant: Like potatoes, eggplants are also in the nightshade family and share similar disease vulnerabilities with tomatoes. Planting them nearby increases the risk of disease transmission. They also compete for the same resources.

Kohlrabi: Similar to other brassicas, kohlrabi can inhibit tomato growth and attract pests.

Other Tomatoes: Planting tomato plants too close together, even if they're different varieties, increases the risk of disease and overcrowding. Give your tomato plants plenty of space to breathe and thrive.

How Far Apart Should I Plant Tomatoes?

Generally, indeterminate tomato varieties (those that keep growing throughout the season) need at least 2-3 feet of space between plants, and 3-4 feet between rows. Determinate varieties (those that grow to a certain size and then stop) can be planted closer together, but still need at least 2 feet of space. Check the specific plant tag for your variety for best results.

What About Herbs? Are There Any to Avoid?

Yes, some herbs are best kept away from your tomatoes. In addition to rosemary, avoid planting dill near tomatoes, as it can attract tomato hornworms. Keep the fennel far away from your vegetable garden completely.

The Tomato Dream Team: Plants That Play Well Together

Now that we've covered the plants to avoid, let's focus on the good neighbors. Companion planting can deter pests, improve soil health, and even enhance the flavor of your tomatoes. Here are some of the best plants to grow near your tomatoes: Basil:This is a classic companion plant for tomatoes. Basil repels many common tomato pests, including tomato hornworms and whiteflies. It's also believed to improve the flavor of tomatoes.

Marigolds: These bright and cheerful flowers are a natural pest deterrent. They release a compound into the soil that repels nematodes, which can damage tomato roots. Marigolds also attract beneficial insects like ladybugs, which prey on aphids.

Nasturtiums: Another colorful flower that attracts beneficial insects and repels pests. Nasturtiums act as a trap crop, drawing aphids away from your tomatoes.

Garlic and Onions: These pungent vegetables repel many tomato pests, including aphids, spider mites, and whiteflies. They also have antifungal properties that can help protect tomatoes from disease.

Carrots: Carrots can help improve soil aeration around tomato plants.

Borage: This beautiful blue-flowered herb attracts beneficial insects like bees and hoverflies, which pollinate tomato flowers. It also repels tomato hornworms.

Parsley: Parsley attracts beneficial insects and can act as a trap crop for certain pests.

Beans and Peas: As legumes, these plants fix nitrogen in the soil, enriching it for your tomatoes. Be mindful of spacing so they don't shade the tomatoes.

Lettuce and Spinach: These leafy greens can provide ground cover around your tomato plants, helping to retain moisture and suppress weeds.

Can I Really Improve Tomato Flavor with Companion Plants?

While the science is still developing, many gardeners swear that certain companion plants, particularly basil, can enhance the flavor of tomatoes. The theory is that the volatile oils released by basil may influence the biochemical processes within the tomato plant, leading to a more flavorful fruit. It's certainly worth experimenting with!

How Do I Arrange My Companion Plants?

Consider the size and growth habits of your companion plants when planning your garden layout. Taller plants, like corn or sunflowers (which aren’t on the “avoid” list but can still block sunlight), should be placed strategically so they don't shade your tomatoes. Smaller plants, like basil and marigolds, can be planted directly around the base of your tomato plants. Mix and match different companion plants to create a diverse and beneficial ecosystem.

Putting It All Together: Designing Your Tomato Garden

Now that you know which plants to avoid and which ones to embrace, it's time to design your tomato garden. Here's a step-by-step guide to help you get started:

1.Assess Your Space: Determine how much space you have available for your tomato garden. Consider the amount of sunlight your garden receives and the soil conditions.

2.Choose Your Tomato Varieties: Select tomato varieties that are well-suited to your climate and growing conditions. Consider factors like disease resistance, size, and flavor.

3.Plan Your Layout: Draw a rough sketch of your garden, indicating where you'll plant your tomatoes and companion plants. Consider the mature size of each plant and ensure they have enough space to grow.

4.Prepare Your Soil: Amend your soil with compost or other organic matter to improve drainage and fertility. Ensure your soil is well-draining and has a p H of

6.0 to

6.8.

5.Plant Your Tomatoes: Plant your tomato seedlings at the recommended spacing, typically 2-3 feet apart. Provide support with stakes or cages to help them grow upright.

6.Add Your Companion Plants: Plant your companion plants around your tomatoes, following the guidelines above.

7.Water and Fertilize: Water your tomatoes regularly, especially during dry spells. Fertilize them with a balanced fertilizer every few weeks to promote healthy growth and fruit production.

8.Monitor for Pests and Diseases: Regularly inspect your tomato plants for signs of pests or diseases. Take action promptly to prevent problems from spreading.

9.Enjoy Your Harvest: Harvest your tomatoes when they are ripe and juicy. Enjoy the fruits (literally!) of your labor.

Should I Grow Tomatoes in Pots?

Growing tomatoes in pots is a great option if you have limited space or poor soil. Choose a large pot (at least 10 gallons) with good drainage. Use a high-quality potting mix and provide support for your tomato plants. Container tomatoes need more frequent watering and fertilization than those grown in the ground. You can still incorporate companion plants in your containers, such as basil or marigolds.

What Are Some Natural Pest Control Methods for Tomatoes?

In addition to companion planting, there are many other natural pest control methods you can use to protect your tomatoes. These include: Handpicking:Remove pests like tomato hornworms by hand.

Insecticidal Soap: Spray your plants with insecticidal soap to kill aphids, spider mites, and whiteflies.

Neem Oil: Neem oil is a natural insecticide and fungicide that can help control a variety of tomato pests and diseases.

Diatomaceous Earth: Sprinkle diatomaceous earth around your plants to kill crawling insects.

Beneficial Insects: Release beneficial insects like ladybugs and lacewings into your garden to prey on tomato pests.

Growing healthy, delicious tomatoes is a journey filled with learning and experimentation. Don't be afraid to try new things and adapt your approach based on your own garden conditions. With a little planning and attention to detail, you can create a thriving tomato garden that provides you with a bountiful harvest all season long. Happy gardening!