What should onions not be planted by?

Answered by Cody Janus

Onions, as versatile plants, can be great companions for many other vegetables in the garden. However, there are a few plants that onions should not be planted near due to their incompatible growth patterns or potential negative effects on each other’s health and productivity. Let’s take a closer look at some vegetables that onions should not be planted by:

1. Peas: Onions and peas have different spacing requirements and growth habits. Peas are climbing plants that need support, while onions have a smaller and more compact growth habit. Planting onions near peas can lead to competition for space and resources, which can result in reduced yields for both crops. It is best to keep these two plants separate in the garden.

2. Pole Beans: Similar to peas, pole beans are climbing plants that require vertical support. Onions, being lower-growing plants, may be overshadowed and shaded by the vigorous growth of pole beans. This can hinder the development of onions and impact their overall productivity. To give both crops the best chance to thrive, it is advisable to plant them in separate areas.

3. Bush Beans: While bush beans do not require vertical support like pole beans, they still have a more spreading growth habit compared to onions. Planting onions near bush beans can result in overcrowding, leading to competition for sunlight, nutrients, and space. This competition can negatively affect the growth and yield of both crops. It is best to provide adequate spacing between onions and bush beans or plant them in separate areas.

4. Asparagus: Onions and asparagus have different growth requirements and timelines. Asparagus is a perennial crop that requires a dedicated bed and a longer growing season. Onions, on the other hand, are typically grown as annuals and have different spacing requirements. Planting onions near asparagus can lead to overcrowding and interfere with the establishment and growth of the asparagus bed. It is recommended to keep these two plants in separate areas of the garden.

It is important to note that these recommendations are based on general observations and experiences in gardening. Every garden is unique, and factors such as soil conditions, climate, and available space can influence the success of companion planting. It is always a good idea to experiment and observe the interactions between different plants in your specific garden to determine what works best for you.

Onions make excellent companions for many vegetables, enhancing their flavor and deterring pests. However, it is best to avoid planting onions near peas, pole beans, bush beans, and asparagus due to their incompatible growth habits or potential negative effects on each other’s growth and productivity. By understanding these planting companions and taking them into consideration, you can create a harmonious and productive garden.