Introduction

When it comes to growing tomatoes, it's important to know what plants you can and cannot plant beside them. Some plants can actually benefit your tomato plants, while others can harm them. In this article, we will explore what plants cannot be planted by tomatoes.

Plants that Shouldn't be Planted by Tomatoes

There are a few plants that shouldn't be planted side-by-side with tomatoes. These include:

1. Brassicas

Brassicas, such as broccoli, cauliflower, and cabbage should not be planted beside tomatoes. These plants are known to release a chemical called catechin, which can stunt the growth of the tomato plant. Additionally, they are in the same family (Cruciferae) as mustard, which can attract pests that can harm your tomato plants.

2. Nightshade Vegetables

Nightshade vegetables, such as peppers, eggplant, and potatoes, should not be planted beside tomatoes. These are all members of the Solanaceae family, and can be subject to the same pests and diseases. Planting them together can increase the risk of these problems developing.

3. Walnuts or Hickory Trees

Walnuts and hickory trees release a chemical called juglone, which can be toxic to tomato plants. This chemical is found in the leaves, walnuts, and roots of the tree, and can prevent tomato plants from growing.

Plants that Can be Planted by Tomatoes

On the other hand, there are also plants that can be beneficial to grow alongside tomatoes. These include:

1. Basil

Basil is a great companion plant for tomatoes. It repels pests like aphids, spider mites, and tomato hornworms, and can also enhance the flavor of your tomatoes.

2. Marigolds

Marigolds are great for preventing pests and diseases from attacking your tomato plants. They release a chemical called alpha-terthienyl, which is toxic to insects.

3. Borage

Borage is a great companion plant for tomatoes as it repels tomato hornworms and attracts bees. This helps with pollination, which is essential for a good tomato harvest.

Conclusion

In conclusion, there are some plants that should not be planted beside tomatoes, including brassicas, nightshade vegetables, walnuts, and hickory trees. However, there are also plants that can be beneficial and enhance their growth, including basil, marigolds, and borage. Knowing what plants to avoid planting beside your tomato plants can help you to have a successful harvest.