What Not to Plant Tomatoes Near

Tomatoes are one of the most popular and versatile vegetables to grow in the home garden. Although they are relatively easy to cultivate, one of the most important factors in the success of your tomato plants is where you plant them in your garden. Proper tomato plant companions can help your tomato plants thrive, but pairing them with the wrong plants can have a negative impact on their growth and yield. Here are some plants you should avoid planting tomatoes near:

Avoid Planting Tomatoes Near Black Walnut Trees

If you have black walnut trees on your property, it’s best to keep your tomato plants as far away as possible. Black walnut trees produce a chemical called juglone in their leaves, bark, and roots. Juglone is toxic to many plants, including tomatoes, and it can stunt their growth and cause yellowing of the foliage.

Avoid Planting Tomatoes Near Brassicas

Brassicas such as broccoli, cauliflower, and cabbage are members of the same family as tomatoes, and planting them near each other can attract the same pests and diseases. If you plant tomatoes near these plants, they may become more susceptible to soil-borne diseases such as Verticillium and Fusarium wilt, and pests such as aphids and whiteflies.

Avoid Planting Tomatoes Near Nightshades

Tomatoes are part of the nightshade family, which includes peppers, eggplants, and potatoes. While it’s fine to plant them together, a common mistake many gardeners make is planting tomatoes near nightshade plants that are already infected with diseases such as blight. This can cause the disease to spread to your tomato plants, leading to reduced yield and even plant death.

Avoid Planting Tomatoes Near Juglone-Sensitive Plants

If you have other plants in your garden that are susceptible to juglone toxicity, it’s best to keep them away from your tomato plants. Some common juglone-sensitive plants include apples, pears, raspberries, blueberries, and many herbs such as basil, dill, and parsley. Planting tomatoes near these plants can cause them to develop yellow, stunted growth and poor yields.

Avoid Planting Tomatoes Near Fennel

Fennel is a member of the Umbelliferae family, which also includes carrots, parsley, and Queen Anne’s lace. While these plants can make good companion plants for tomatoes, fennel is an exception. Planting tomatoes near fennel can sometimes cause them to develop a bitter taste.

Conclusion

By avoiding planting tomatoes near these plants and trees, you can help ensure the health and productivity of your plants. Keep in mind that this is not an exhaustive list, and you should always research your specific plants and their companion planting requirements before putting them in your garden. With proper planning, you can help your tomato plants grow strong, healthy, and delicious!