When deciding what not to plant next to tomatoes, avoid crops like brassicas (broccoli, cabbage), corn, potatoes, and fennel. These plants can attract pests or compete for nutrients, negatively impacting your tomato harvest. Understanding companion planting is key to a thriving garden.

What to Avoid Planting Near Your Tomatoes?

Tomatoes are a garden favorite, but their needs are specific. To ensure a bountiful harvest of juicy, healthy tomatoes, it’s crucial to be mindful of their neighbors. Certain plants can hinder their growth, attract unwanted pests, or even introduce diseases.

Brassicas: A Competitive Bunch

Vegetables like broccoli, cauliflower, kale, and cabbage belong to the brassica family. These plants are heavy feeders, meaning they consume a lot of nutrients from the soil. Planting them too close to your tomatoes can lead to nutrient deficiencies for both crops.

Furthermore, brassicas can attract certain pests that might also target tomato plants. For instance, the cabbage worm can sometimes venture onto tomato foliage. Keeping these hungry eaters separate gives your tomatoes a better chance to flourish.

Corn: A Shared Pest Problem

While corn and tomatoes might seem like a classic summer pairing, they share a common enemy: the corn earworm. This pest is a significant threat to both crops. When corn is planted near tomatoes, it provides an easy migration route for the earworm to find and damage your precious tomatoes.

This shared pest vulnerability makes corn a poor companion for tomatoes. It’s generally best to give these two crops some distance in your garden layout.

Potatoes: Disease Susceptibility

Tomatoes and potatoes are both members of the nightshade family. While this might seem like a good reason for them to get along, it actually presents a significant risk. Both plants are susceptible to the same diseases, most notably late blight.

If one plant contracts late blight, the disease can easily spread to the other, potentially devastating your entire crop. To prevent this, it’s wise to keep tomatoes and potatoes in separate areas of your garden.

Fennel: An Inhibitor of Growth

Fennel is known for its strong flavor and aroma. However, it’s not a friendly neighbor for many garden plants, including tomatoes. Fennel is believed to inhibit the growth of tomatoes, potentially stunting their development and reducing their yield.

It’s best to keep fennel in its own dedicated spot, away from your tomato plants.

Walnut Trees: Toxic Neighbors

If you have a walnut tree on your property, be very careful where you plant your tomatoes. Walnut trees release a substance called juglone from their roots and leaves. Juglone is toxic to many plants, including tomatoes, and can cause wilting and eventual death.

Ensure your tomato patch is well outside the drip line of any walnut tree.

Why Companion Planting Matters for Tomatoes

Understanding which plants to avoid is just one piece of the puzzle. Companion planting is the practice of strategically placing plants together that benefit each other. For tomatoes, this means choosing companions that deter pests, attract beneficial insects, or improve soil health.

When you avoid planting detrimental neighbors, you create an environment where your tomatoes can thrive. This leads to healthier plants, fewer pest problems, and ultimately, a more abundant harvest.

Benefits of Smart Companion Planting

• Pest Deterrence: Certain herbs like basil and marigolds can repel common tomato pests.
• Attracting Pollinators: Flowers like calendula can draw in bees and other pollinators, improving fruit set.
• Nutrient Enhancement: Legumes can fix nitrogen in the soil, providing a natural fertilizer.
• Improved Flavor: Some gardeners believe certain companions can enhance the taste of tomatoes.

What Are Good Companion Plants for Tomatoes?

While we’ve focused on what not to plant, it’s equally important to know what to plant. Beneficial companions can significantly boost your tomato’s health and productivity.

Top Tomato Companions:

• Basil: Repels tomato hornworms and whiteflies, and is said to improve tomato flavor.
• Marigolds: Their roots deter nematodes in the soil, and their flowers attract pollinators.
• Carrots: Loosen the soil, making it easier for tomato roots to grow.
• Onions and Garlic: Their strong scent can deter pests like aphids.
• Borage: Attracts beneficial pollinators and is thought to deter tomato hornworms.

A Quick Comparison of Tomato Neighbors

People Also Ask

### What plants should not be planted with tomatoes?

You should avoid planting tomatoes next to brassicas (like broccoli and cabbage), corn, potatoes, and fennel. These plants can compete for nutrients, attract shared pests, or even inhibit tomato growth. It’s also crucial to keep them away from walnut trees due to toxic juglone.

### Can I plant broccoli and tomatoes together?

No, it’s generally not recommended to plant broccoli and tomatoes together. Broccoli is a heavy feeder and can deplete the soil of nutrients that tomatoes need. Additionally, both plants can sometimes attract similar pests, increasing the risk of infestation for your tomato plants.

### Is it okay to plant corn and tomatoes together?

It’s best to avoid planting corn and tomatoes together. The primary reason is that both crops are susceptible to the corn earworm. Planting them in close proximity can create an easy pathway for this damaging pest to move between the plants, jeopardizing your tomato harvest.

### Can tomatoes and potatoes be planted in the same garden?

While they can be in the same garden, it’s highly advisable to plant tomatoes and potatoes in separate areas. Both are susceptible to the same fungal disease, late blight. If one plant gets infected, the disease can quickly spread to the other, leading to significant crop loss.

### What herbs are good for tomatoes?

Several herbs make excellent companions for tomatoes. Basil is a top choice, known for repelling pests like tomato hornworms and whiteflies. Borage is also beneficial, attracting pollinators and deterring hornworms. Mint can deter pests, but it’s best planted in containers as it can be invasive.

By carefully considering your tomato plants’ neighbors, you can significantly improve their health and yield. Remember to research companion planting for all your garden vegetables to create a harmonious and productive growing space.

If you’re looking to maximize your tomato harvest, consider exploring our guide on organic pest control for tomato plants or learn more about **soil enrichment