Hey there! I'm a supplier of tomato plant greenhouses, and I've been in this business for quite a while. Over the years, I've learned a thing or two about growing tomatoes in a greenhouse, and one of the most important aspects is choosing the right companion plants. In this blog post, I'll share with you some of the best companion plants for tomato plants in a greenhouse.
First off, let's talk about why companion planting is so important. Companion plants can help improve the health and productivity of your tomato plants in several ways. They can attract beneficial insects, repel pests, improve soil fertility, and even enhance the flavor of your tomatoes. By choosing the right companion plants, you can create a more balanced and sustainable ecosystem in your greenhouse.
One of the best companion plants for tomato plants is basil. Basil is not only a delicious herb that can be used in a variety of dishes, but it also has several benefits for tomato plants. Basil repels pests such as aphids, mosquitoes, and flies, which can damage your tomato plants. It also attracts beneficial insects such as bees and butterflies, which can help pollinate your tomatoes. Additionally, basil has been shown to improve the flavor of tomatoes when grown together. So, if you're looking for a great companion plant for your tomato plants, basil is definitely a good choice.
Another great companion plant for tomato plants is marigolds. Marigolds are known for their bright, colorful flowers, but they also have several benefits for tomato plants. Marigolds repel nematodes, which are microscopic worms that can damage the roots of your tomato plants. They also attract beneficial insects such as ladybugs and lacewings, which can help control pests in your greenhouse. Additionally, marigolds have been shown to improve the overall health and productivity of tomato plants. So, if you want to protect your tomato plants from nematodes and other pests, marigolds are a great choice.
Nasturtiums are another excellent companion plant for tomato plants. Nasturtiums are known for their beautiful, edible flowers, but they also have several benefits for tomato plants. Nasturtiums repel pests such as aphids, whiteflies, and cucumber beetles, which can damage your tomato plants. They also attract beneficial insects such as hoverflies and bees, which can help pollinate your tomatoes. Additionally, nasturtiums have been shown to improve the flavor of tomatoes when grown together. So, if you're looking for a beautiful and beneficial companion plant for your tomato plants, nasturtiums are a great choice.
Chives are also a great companion plant for tomato plants. Chives are a member of the onion family, and they have several benefits for tomato plants. Chives repel pests such as aphids, Japanese beetles, and carrot flies, which can damage your tomato plants. They also attract beneficial insects such as bees and butterflies, which can help pollinate your tomatoes. Additionally, chives have been shown to improve the overall health and productivity of tomato plants. So, if you want to protect your tomato plants from pests and improve their health, chives are a great choice.
Garlic is another excellent companion plant for tomato plants. Garlic is known for its strong, pungent flavor, but it also has several benefits for tomato plants. Garlic repels pests such as aphids, spider mites, and whiteflies, which can damage your tomato plants. It also has antifungal and antibacterial properties, which can help prevent diseases in your greenhouse. Additionally, garlic has been shown to improve the flavor of tomatoes when grown together. So, if you're looking for a natural way to protect your tomato plants from pests and diseases, garlic is a great choice.
In addition to these companion plants, there are several other plants that can be beneficial for tomato plants in a greenhouse. For example, borage is a great companion plant for tomato plants because it attracts bees and other beneficial insects. Dill is another good companion plant for tomato plants because it repels pests such as aphids and spider mites. And oregano is a great companion plant for tomato plants because it has antifungal and antibacterial properties.
Now that you know some of the best companion plants for tomato plants in a greenhouse, you might be wondering how to plant them. The key is to plant them in close proximity to your tomato plants, but not too close. You want to give your tomato plants enough space to grow and spread out, but you also want to make sure that the companion plants are close enough to provide their benefits.
When planting your companion plants, it's also important to consider their growing requirements. Some companion plants, such as basil and marigolds, prefer full sun, while others, such as chives and garlic, can tolerate partial shade. Make sure you choose companion plants that have similar growing requirements to your tomato plants to ensure that they all thrive in your greenhouse.


In conclusion, choosing the right companion plants for your tomato plants in a greenhouse is essential for their health and productivity. By planting basil, marigolds, nasturtiums, chives, garlic, and other beneficial plants, you can create a more balanced and sustainable ecosystem in your greenhouse. So, if you're a tomato plant grower, I highly recommend giving companion planting a try.
If you're interested in purchasing a Tomato Plant Greenhouse, we have a great selection of options available. We also offer Tunnel Greenhouse and Gothic Style High Tunnel Greenhouse for those looking for different styles. If you have any questions or would like to discuss your specific needs, feel free to reach out to us. We're here to help you create the perfect environment for your tomato plants.
References
- "Companion Planting for Tomatoes." University of Minnesota Extension.
- "The Complete Guide to Companion Planting." Rodale Institute.
- "Tomato Companion Plants." Gardening Know How.