How Close to Plant Tomatoes and Marigolds

If you're a gardener who loves growing both tomatoes and marigolds, you may wonder how to place them in your garden. While some gardeners prefer to plant tomatoes and marigolds in separate beds, others like to plant them together, relying on the marigolds to provide pest control for the tomatoes. So, how close should you plant tomatoes and marigolds?

Why Plant Tomatoes and Marigolds Together?

Tomatoes and marigolds have a symbiotic relationship that can benefit both plants. Marigolds contain a compound called alpha-terthienyl that is toxic to root-knot nematodes, a pest that can damage tomato roots. By planting marigolds alongside your tomatoes, you can help prevent the nematodes from attacking the tomatoes' roots. In addition, marigolds attract hoverflies, which are natural predators of aphids, another common tomato pest.

On the other hand, tomatoes can benefit marigolds by providing shade, which can prevent them from wilting in the summer heat. Tomatoes also produce a chemical called solanine, which can repel some insects that may attack marigolds.

Planting Distance for Tomatoes and Marigolds

When it comes to planting distance for tomatoes and marigolds, the general rule of thumb is to keep them at least 2 feet (60 cm) apart. Tomatoes have deep roots that require plenty of space, while marigolds have a spread-out root system. By giving each plant enough space to grow, you'll prevent them from competing for nutrients and water.

However, if you're planting marigolds for pest control purposes, you may want to consider planting them closer to the tomatoes. Some gardeners place marigolds in between each tomato plant or in a border around the tomato bed. In this case, a distance of about 1 ft (30 cm) between the plants should be enough to allow the marigolds to provide pest control.

Other Considerations for Planting Tomatoes and Marigolds

Aside from planting distance, you should also consider other factors when planting tomatoes and marigolds together. First, make sure both plants receive enough sunlight. Tomatoes need at least 6 hours of direct sunlight per day, while marigolds prefer full sun. Plant them in a spot that receives plenty of sunlight throughout the day.

Second, consider soil quality. Tomatoes prefer slightly acidic soil with a pH of 6.0-6.5, while marigolds can tolerate a wider range of pH levels. Add compost or organic matter to improve soil fertility for both plants.

Finally, be aware of watering needs. Tomatoes need consistent moisture throughout the growing season, while marigolds are more drought tolerant. Water both plants regularly, but don't overwater.

Conclusion

Planting tomatoes and marigolds together can provide both plants with benefits, including pest control and shade. When planting these two plants together, keep them at least 2 feet (60 cm) apart and ensure they receive enough sunlight, have proper soil quality, and are watered appropriately. With a little planning and care, you can have a beautiful and productive garden with both tomatoes and marigolds.