Companion Plants For Onions

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What Are the Best Onion Companion Plants? Bad Onion Companions

Companion Plants for Onions – 2023 Blog Article


Welcome to our gardening blog post for the year 2023! In this article, we will discuss companion plants for onions. Companion planting is a gardening technique where certain plants are grown together to benefit each other. By choosing the right companions for your onions, you can enhance their growth, repel pests, and improve overall garden health. Let’s explore some of the best companion plants for onions!


1. What are companion plants?

Companion plants are plants that are grown together to provide mutual benefits. They can help with pest control, improve soil quality, enhance pollination, and more. When it comes to onions, choosing the right companions can deter pests, provide shade, and improve overall yield.

2. Which plants are good companions for onions?

There are several plants that make great companions for onions. Some popular choices include:

  • Carrots: Carrots and onions are known to enhance each other’s flavors when grown together. Carrots also help repel onion flies, which are a common pest for onions.
  • Lettuce: Lettuce provides shade to onion bulbs, preventing them from getting sunburned. This can result in healthier and larger onions.
  • Chamomile: Chamomile has natural fungicidal properties that can help protect onions from fungal diseases.
  • Tomatoes: Tomatoes and onions are compatible companions. Tomatoes help repel aphids and other pests that can damage onions.
  • Beets: Beets and onions have similar nutrient requirements and can be grown together without competing for resources.

3. Are there any plants that should be avoided as companions for onions?

Yes, there are a few plants that are not recommended as companions for onions. These include:

  • Beans: Onions and beans are not good companions as they both require different soil conditions and can compete for nutrients.
  • Peas: Peas and onions have different pH requirements, which can affect their growth when planted together.
  • Brassicas: Brassicas, such as cabbage, broccoli, and kale, can stunt the growth of onions when grown together.
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4. How should companion plants be arranged in the garden?

When planting companion plants with onions, it’s important to consider their size and growth habits. Taller plants should be positioned on the north side of the onion bed to avoid shading the onions. Smaller plants can be planted around the edges or in between the onion rows.


Companion planting is a great way to maximize the growth and health of your onions. By choosing the right companions, you can create a harmonious garden ecosystem that benefits all plants involved. Remember to avoid incompatible companions and consider the arrangement of plants in your garden. Happy gardening!