What to Companion Plant with Tomatoes

Tomatoes are a staple in many gardens and for good reason. They are a nutritious and delicious addition to any meal. However, they also have some pests and diseases that can affect their growth and yield. To combat these issues while improving soil health and diversity, companion planting is a great option.

Companion Plants for Tomatoes

1. Basil:

Basil is a natural deterrent for tomato hornworms, which can eat half a tomato plant in just one day. Additionally, basil's aromatic oils repel other tomato pests such as whiteflies and aphids. Planting basil around your tomato plants is a great idea as the two plants can also help to make each other grow faster and healthier.

2. Marigolds:

Marigolds have a strong fragrance that repels various insects while also attracting beneficial pollinators such as bees and butterflies. They also released a naturally occurring chemical called pyrethrum which can deter nematodes and other harmful soil-borne pathogens.

3. Nasturtiums:

Nasturtiums are both attractive and useful companion plants. They are a great way to attract beneficial predatory insects as well as confusing pests such as aphids with their distinct odor. Additionally, nasturtiums will not compete with the tomato plant for resources, and their trailing nature can help to serve as mulch or ground cover.

Plants to Avoid Planting with Tomatoes

1. Fennel:

Fennel is a member of the carrot family and can attract aphids that will then be attracted towards your tomato plants. Additionally, the root exudates from fennel can stunt the growth of other plants around it, including tomatoes.

2. Corn:

While corn and tomatoes are often considered a classic combination, planting them together can cause issues. The two plants both have high nutrient requirements, making it challenging to maintain proper soil fertility levels around both the plants. Additionally, both plants are prone to attracting similar pests such as cutworms and corn earworms. Planting them together can lead to more pest pressure and less yield overall.

3. Walnuts:

Walnuts are not typically grown in the same area as tomatoes due to the chemical juglone, which can leach from the roots and leaves of the walnut tree. This chemical inhibits the growth of other plants, including tomatoes, causing stunted growth and reduced yield.

Conclusion

Companion planting can be an effective way to improve the health and yield of your tomato plants, while also creating a diverse and beautiful garden. Basil, marigolds, and nasturtiums are excellent plants to companion with tomatoes, while fennel, corn, and walnuts should be avoided. Make sure to do your research and choose companion plants based on your specific garden's needs and climate.