What not to plant with onions

Onions are a delicious and nutritious vegetable that can be grown in many different gardens. They are relatively easy to grow and require minimal maintenance, making them a popular choice for both novice and experienced gardeners. However, it is important to consider what plants should not be planted with onions in order to ensure a successful crop. Here are some plants you should avoid planting with onions:

Tomatoes

One of the most common mistakes that gardeners make when planting onions is planting them too close to tomatoes. Tomatoes and onions are both members of the nightshade family and are prone to many of the same pests and diseases such as blight, which can quickly spread from one plant to another. Additionally, tomatoes are heavy feeders and can take up important nutrients from the soil that onions need to grow. Therefore, it is best to keep these two plants separate in order to avoid competition and the risk of disease.

Beans and Peas

Beans and peas are another group of plants that should not be planted with onions. These plants are both nitrogen-fixing crops, which means that they pull nitrogen from the air and convert it into a form that is usable by plants. However, onions do not need a lot of nitrogen and can actually become stunted if they are grown near these plants. Additionally, beans and peas can attract root-knot nematodes, which can damage the roots of onions and reduce their yield.

Brassicas

Brassicas include vegetables such as broccoli, cabbage, and cauliflower, and should not be planted with onions. These plants are known for their ability to attract pests such as cabbage worms and aphids, which can also attack onions. Additionally, brassicas are heavy feeders and can compete with onions for nutrients in the soil. Therefore, it is best to keep onions away from brassica plants in order to avoid pest infestations and competition for resources.

Conclusion

When planning your garden, it is important to consider what plants should not be planted with onions in order to ensure the health and productivity of your onions. Tomatoes, beans and peas, and brassicas are three groups of plants that should be kept separate from onions. By avoiding these plants and choosing companion plants carefully, you can help your onions to thrive and produce a bountiful harvest.