What to Not Plant Next to Tomatoes?

Tomatoes are one of the most popular and widely grown crops by gardeners. They are quite easy to grow, and with proper care, can yield a bountiful harvest. However, not all plants make good companions for tomatoes. It is important to know what not to plant next to tomatoes to avoid problems such as stunted growth, pests, and diseases.

Avoid Planting Nightshade Vegetables Next to Tomatoes

Tomatoes belong to the nightshade family of vegetables, which includes peppers, eggplants, and potatoes. While these plants can be grown alongside tomatoes, it is best to avoid planting them too close together. This is because they are all susceptible to similar pests and diseases.

For example, planting tomatoes and potatoes together can lead to infestations of the Colorado potato beetle which feeds on both crops. Similarly, planting tomatoes and eggplants close together increases the risk of attracting spider mites and flea beetles. Therefore, it is best to rotate these nightshade vegetables each season or plant them at least 4 feet apart.

Avoid Planting Corn Next to Tomatoes

Corn is another crop that should not be planted next to tomatoes. Both plants are heavy feeders, and planting them together can result in competition for nutrients. This can lead to stunted growth and reduced yields in both crops. Moreover, corn is a tall plant that can shade tomatoes and limit their access to sunlight. This can also lead to a reduction in tomato growth and yield.

If you need to grow both crops, it is best to plant them at least 4 feet apart. Additionally, it is a good practice to supplement the soil with extra nutrients such as compost and fertilizers to ensure they have sufficient nutrients to grow.

Avoid Planting Brassicas Next to Tomatoes

While tomatoes and brassicas (such as broccoli, cauliflower, and cabbage) may look great in the same garden bed, it is best to avoid planting them together. This is because they are both susceptible to similar diseases such as fungal infections and wilts. Additionally, certain brassica crops such as broccoli and cauliflower release chemicals into the soil that can stunt tomato growth.

If you want to grow both crops, consider using crop rotation. This means planting tomatoes and brassicas in different areas each season to avoid buildup of pests and diseases in the soil. Alternatively, you can plant them at least 3 feet apart to reduce the risk of cross-contamination.

Avoid Planting Walnut Trees Near Tomatoes

Another crop to avoid planting near tomatoes is walnut trees. Walnuts release a chemical called juglone, which is toxic to many plants, including tomatoes. This chemical is found in all parts of the tree, including the leaves, bark, and roots. Even the nuts themselves can contain juglone, which can persist in the soil for months or even years.

If you have walnut trees in your garden or close by, it is best to plant tomatoes at least 50 feet away. Alternatively, you can create a barrier between the two crops by using raised beds or containers.

Conclusion

Growing tomatoes is a rewarding and enjoyable experience, but it is important to choose the right companions. Avoid planting nightshade vegetables, corn, brassicas, and walnut trees near tomatoes to prevent competition, disease, and pest problems. Instead, consider planting compatible crops such as basil, marigold, and petunias, which can boost tomato growth and keep pests away.