Do Marigolds Help Tomato Plants?

As gardeners, we're always looking for ways to improve the health and yield of our plants. One common suggestion is to plant marigolds alongside tomato plants, but does this actually help? Let's take a closer look.

The Theory

There are a few theories as to why marigolds may help tomato plants. One is that marigolds exude a chemical that deters certain pests, such as nematodes, which can damage tomato roots. Another theory is that marigolds attract beneficial insects, such as ladybugs, that eat harmful pests. Finally, some believe that marigolds simply improve the soil with their root system.

The Science

While there is some anecdotal evidence to suggest that marigolds can help tomato plants, the scientific studies are mixed. Some studies have found that marigolds do indeed reduce nematode populations and improve soil quality, while others have found no significant effects. Similarly, while marigolds can attract beneficial insects, the impact on tomato plant health is unclear.

So, Should You Plant Marigolds with Tomatoes?

Ultimately, whether or not to plant marigolds alongside tomato plants is up to the individual gardener. While the science is inconclusive, there's certainly no harm in trying. After all, marigolds are a beautiful and hardy flower that can be a colorful addition to any garden. Additionally, if you do decide to plant marigolds, be sure to choose a variety that is compatible with your tomatoes - some marigolds can actually attract harmful pests!

Other Tips for Tomato Plant Health

While marigolds may or may not help your tomato plants, there are plenty of other things you can do to promote their health and yield. Make sure your plants are getting enough sunlight, water, and nutrients. Avoid overwatering, which can lead to root rot, and be vigilant for any signs of pest or disease problems. Finally, be sure to properly prune and support your tomato plants to encourage strong growth.

The Bottom Line

While the idea of planting marigolds alongside tomato plants may seem like a no-brainer, the science behind the practice is inconclusive. However, if you're interested in giving it a try, there's certainly no harm in doing so. Just be sure to choose a compatible variety of marigold and keep your tomato plants healthy in other ways as well.