Growing Green Onions with Companion Plants: A Comprehensive Guide

Green onions, also known as scallions, are a popular ingredient in many dishes. They're easy to grow and don't require much space, making them a great choice for those who want to a garden but have limited room. One of the best ways to maximize the benefits of growing green onions is to plant them alongside compatible companion plants. In this guide, we'll explore the different types of plants that can be grown alongside green onions, as well as the benefits they provide.

The Benefits of Companion Planting

Companion planting is the practice of growing different plants together to enhance their growth and protect them from pests and diseases. When it comes to green onions, there are several benefits to growing them with companion plants:

- Increased yield: Companion plants can help increase the yield of green onions by providing them with nutrients and enhancing soil health.
- Pest control: Certain companion plants can repel pests that would otherwise attack green onions.
- Disease prevention: Companion plants can also prevent the spread of diseases that target green onions.
- Aesthetic appeal: Some companion plants add visual interest to a garden and can create a more attractive setting for growing green onions.

Choosing Companion Plants for Green Onions

When choosing companion plants for green onions, it's important to consider compatibility. Not all plants work well together, and some combinations can actually harm the growth of both plants. Here are some of the best companion plants to grow alongside green onions:

1. Garlic

Garlic is one of the best companion plants for green onions. It repels pests like aphids and onion flies, which can damage the growth of green onions. Additionally, garlic can help keep soil healthy by repelling harmful fungi and bacteria.

2. Carrots

Carrots are another great companion plant for green onions. They provide nutrients that are beneficial to green onions, such as potassium and phosphorus. Additionally, carrots attract beneficial insects like ladybugs, which can help control pests that might otherwise harm green onions.

3. Lettuce

Lettuce is a good companion plant for green onions because it provides shade and helps retain moisture in the soil. This is especially beneficial during hot weather when green onions might otherwise wilt or dry out.

4. Chamomile

Chamomile is a natural insect repellent and can help keep pests away from green onions. Additionally, chamomile tea can be used as a natural fungicide to prevent diseases from spreading.

5. Marigold

Marigold is another natural insect repellent that can help protect green onions from pests. Additionally, marigolds attract beneficial insects like hoverflies, which can help control other pests that might target green onions.

Planting Companion Plants with Green Onions

When planting companion plants alongside green onions, it's important to consider spacing and timing. Here are some tips for planting companion plants with green onions:

1. Spacing

Make sure to give each plant enough space to grow. This will help prevent competition for nutrients and sunlight. As a general rule, green onions should be planted about 4 inches apart, while companion plants should be spaced according to their individual needs.

2. Timing

Make sure to plant companion plants at the same time as green onions. This will help ensure that they grow together and benefit from each other's presence. Additionally, make sure to stagger planting times for companion plants to ensure a continuous harvest.

Caring for Companion Plants and Green Onions

To ensure that both your green onions and companion plants thrive, there are some important care tips to keep in mind:

1. Watering

Make sure to water both green onions and companion plants regularly. This will help prevent wilting and ensure that the soil stays healthy.

2. Fertilizing

Use a balanced fertilizer to provide both green onions and companion plants with the nutrients they need to grow. Be careful not to over-fertilize, as this can harm the growth of both plants.

3. Pruning

Regularly prune both green onions and companion plants to prevent overcrowding and promote healthy growth. Be careful not to remove too much foliage, as this can harm the plant.

Harvesting Green Onions and Companion Plants

When it comes time to harvest your green onions and companion plants, there are some important guidelines to follow:

1. Timing

Harvest green onions when they reach maturity, which is usually around 60-90 days after planting. For companion plants, refer to the specific variety for harvesting guidelines.

2. Technique

Use a sharp knife or shears to cut green onions at the base of the plant. For companion plants, follow the specific harvesting guidelines for each variety.



Growing green onions with companion plants is an excellent way to enhance growth, protect against pests and diseases, and create an attractive garden setting. By following the tips and guidelines outlined in this guide, you can create a successful garden that yields healthy and delicious green onions.

FAQs

1. Can green onions be grown indoors?

Yes, green onions can be grown indoors with the right conditions. Make sure to provide ample lighting and regular watering.

2. How do I know if my green onions are mature enough for harvest?

Mature green onions usually have a bulb that has begun to form at the base of the plant. Additionally, the leaves should be about 6-8 inches tall.

3. Are there any companion plants that should not be grown with green onions?

Yes, some plants can actually harm the growth of green onions when grown together. Avoid planting green onions with beans, peas, or sage.

4. Can I grow green onions in a container garden?

Yes, green onions can be grown in containers as long as they have adequate drainage and are planted in nutrient-rich soil.

5. How often should I fertilize my green onions and companion plants?

Fertilize green onions and companion plants once every two weeks with a balanced fertilizer during the growing season.