How to Plant Onions with Tomatoes

Planting onions and tomatoes together in the same garden bed can benefit both plants. Onions release a strong scent that deters pests, while tomatoes repel onion maggots. In addition, onions help improve soil quality with their root systems, which is beneficial for tomato growth. Follow these tips to successfully plant onions with tomatoes.

Choose the Right Location

Choose a location that has full sun exposure and well-drained soil. This means that the soil should be able to hold moisture while also allowing excess water to drain away quickly. Onions and tomatoes need plenty of light and moisture to thrive, so make sure to choose a spot that meets these requirements.

Prepare the Soil

Before planting, prepare the soil by removing any weeds or debris. Also, add organic matter such as compost or aged manure to the soil to improve its nutrient content. Mix the organic matter into the top 6 to 8 inches of soil to help the roots of both plants grow properly.

Plant the Onions

Plant onion sets in early spring, about 2 to 3 weeks before the last frost. Make rows about 12 to 18 inches apart and plant the onion sets 4 to 6 inches apart within the rows. The top of the onion bulb should be just below the surface of the soil. Cover the bulb with about an inch of soil and then water thoroughly.

Plant the Tomatoes

After the onions are in the ground, it is time to plant the tomatoes. Wait until the soil has warmed up before planting the tomatoes. Make sure to space the tomato plants far enough apart so that they have room to grow. Tomatoes should be planted at least 18 to 24 inches apart. Water the tomato plants regularly to keep the soil moist, but not too wet.

Maintain the Garden

As the plants grow, make sure to keep the garden well-maintained. Water the plants regularly and weed around them so that the plants have plenty of room to grow. Adding mulch around the plants can help retain moisture in the soil and also prevent weeds from growing.

Conclusion

Planting onions with tomatoes is an excellent way to improve the health of both plants. By following these tips, you can successfully plant and maintain a garden bed with both onions and tomatoes. With a bit of effort and care, you can enjoy a bountiful harvest of both vegetables.