What to Plant Next to Onions? – Onion Companion Plants

There are many different types of plants that can help grow onions. The main thing to look at is the plant’s light requirements and nutrient needs. This will be different for each type of onion.

Onion companions are plants that work together to make your onions grow and thrive. They are perfect for keeping the onions away from pungent odors and other weeds and also help control pests.

In this article, I will share the best companion plants for onions. I will go over the basic things you need to know to select the right plant for you.

Why Do Onions Make a Great Companion Plant For Many Crops?

Companion planting is one of the oldest practices in agriculture. It was first known in India and Egypt, and now it is a widespread practice worldwide. Companion planting has many benefits for different crops, some of which are listed below.

1. It helps plants to grow faster and bigger

The first explanation is that when we plant two or more different vegetables, there will be competition between them. If one vegetable is more significant, it will get less water and nutrients. So, companion planting will help both plants to grow better.

2. It will give protection from pests and diseases

If we have onions around the tomato plants, the tomatoes will get minor damage from insects and diseases. Onion has a strong smell that will scare away pests.

3. It gives better quality fruit

Companion planting also helps the crops to grow in a better way. We can say that if we plant two or more vegetables together, it will increase productivity.

Companion planting can be a great help for all kinds of crops, and it will also make your garden look more attractive. I hope you will use this knowledge in your garden. You can use onion as a companion plant for many crops.

What to Plant Next to Onions?

I am sure many people are unaware of the importance of onion companions. If you are a person who grows onions in your garden, you must be mindful that the growth of your onions depends on the companion plants. If you don’t want to waste your time, you need to plant companion plants in the same area growing onions.

If you have a small garden and a limited space, it is better to grow companion plants with similar or exact growing requirements as onions. The following are the onion companions that will help you get more benefits and increase the yield of your onions.

Flea Beetle

Bunching green onions and marigolds are a few examples of companion crops used for flea beetle management. These plants help to protect other plants from pests and improve their overall health. Consider adding these plants to your garden to improve its health.


One plant family that can benefit from being grown alongside onions is the brassicas. Brassica plants are known for their ability to fight against parasitic wasps. This makes them an ideal companion for onion plants, which help to repel these pests. Consider adding brassica plants to your landscape if you want to improve the health of your garden.

Aphids are a common pest that can be difficult to get rid of. In addition to damaging plants, they are difficult to remove by hand. Onion plants release a gas that can help deter aphids from attacking other plants. This makes onion plants ideal companions for plants that often fall victim to these pests.


When growing broccoli, it is a good idea to plant onions nearby. Not only will this improve the flavor of the broccoli, but it will also help to protect the broccoli from pests. Onion plants release a gas that can help deter aphids from attacking other plants. This makes onion plants ideal companions for plants that often fall victim to these pests.

If you want further information about Broccoli Companion plants.


Cabbage and onion plants are a good combination because they help to protect each other from pests. Cabbage plants release a gas that can help deter aphids from attacking onion plants. Onion plants, in turn, help to repel cabbage root flies.

Think about adding cabbage plants to your landscape if you want to improve the health of your garden. Not only will they help protect other plants from pests, but they will also help the overall health of your garden.


Garlic is a good neighbor of the Onion because its pungent smell makes it a deterrent to pests. Garlic’s strong scent helps to protect onion plants from pests, which makes it a valuable addition to any garden. Consider adding garlic plants to your garden for improved health.

One great way to dissuade birds and other unwanted pests from eating your vegetables is to plant garlic nearby. Garlic’s strong smell will help to keep these pests away, which will help ensure that your vegetables remain safe. Garlic plants can improve the health of your garden if you add them to your landscape.

The pungent odor of garlic repels pests like caterpillars during the growing season. This makes it a good companion for onion plants, susceptible to caterpillar attacks. Consider adding garlic plants to your landscape if you want to improve the health of your garden.

Green bean

Green bean is a good option for people looking for a practical onion companion. You can grow green beans in the same area where you are growing onions, but make sure that your green bean plant is at least 2 meters away from the onions because onions are very toxic to other vegetables.


Lettuce is also a great companion plant for onions and has many benefits. It is rich in iron which is necessary for the healthy growth of your onions. You can grow lettuce in the same place where you are growing onions. The only thing is that you should use a soil conditioner before planting the lettuce.


Tomatoes are another effective companion plant for onions because they have many benefits. They are very rich in nutrients and vitamins, which are essential for the healthy growth of your onions. So, if you have limited space and want to grow tomatoes, then it is better to produce them near your onions.

If you want to learn about Tomato Companion Plants

Herbs That Make Good Companion Plants for Onions

Companion plants are good plants that help grow vegetables by improving their yield. The herbs are the best companion plants for onions, but they should not be placed too close.

Onions are one of the most nutritious vegetables that we can eat. But if you grow them, you will be happy as they are a good source of vitamins and minerals like folic acid, vitamin B, C, and potassium. It also has a high content of soluble and insoluble fibers and contains antioxidants.

So, it is the best vegetable to grow in the garden, and it can be produced worldwide. The best thing about onions is that they have low maintenance requirements and proliferate.

Here are some of the herbs that make good companion plants for onions:


Basil has many medicinal benefits. One of the most important benefits is its antimicrobial properties. This herb is also used to cure many ailments like colds, coughs, flu, and stomach problems.


This herb is widely used in the kitchen and has a unique flavour. It is the best herb to plant with onions. It gives off a pleasant scent and attracts beneficial insects. You can add parsley to any dish, which includes onion. It also helps in retaining moisture and improves soil quality.


Borage is one of the most famous herbs for onion plants. It also attracts ladybugs and other beneficial insects to your garden. If you have a large patch of onion plants, you can grow borage for an additional benefit. Borage also can keep aphids away from the plant.


Dill is a great companion plant to onions. It adds a pleasant scent to the garden and is used in many dishes. Dill is easy to grow and even used to make pickles. It is used to repel pests, and it also adds a lot of flavors to the garden.


This herb is widely known for its ability to repel pests from plants. It also helps in retaining moisture and keeps the soil healthy. If you want an attractive garden, consider adding nasturtium to your onion patch.


If you are looking for a fragrant herb, then lavender is the best option. It also has a lot of health benefits, especially for those with skin conditions. Lavender attracts bees, and it also has anti-inflammatory properties. If you have any skin problems, then you must try this herb.


Marigolds are the best companion plants for onions. They will help you grow healthy vegetables and are also used in the kitchen as they have many health benefits. The flowers are edible and used in salads.


The rosemary leaves are used in cooking as they are full of antioxidants. It is a rich vitamin B6, iron, magnesium, and calcium source. It is a good herb for treating heartburn, indigestion, colds, flu, arthritis, and stress.


Thyme is another good herb for growing onions. It is rich in vitamin C, folic acid, vitamin K, potassium, phosphorus, and magnesium. Thyme is also used to treat insomnia, constipation, stomachache, and joint pain.


Sage is an excellent herb that can protect plants from insects and diseases. It is a rich source of vitamins A and K. It is also used to treat coughs, fever, indigestion, and stomachaches.

So, these are the best herbs that make good companion plants for onions. You can grow them in your garden, and they will improve the growth rate of the onions.

What Not To Plant Near Onions?

1.Beans, peas, and other legumes.

Onions can kill the helpful bacteria that grow on the bean, pea, and other legume roots, stunting the growth. Since these legume plants fix nitrogen to the soil and onions are heavy nitrogen feeders, onions are a great option to plant after pulling your legume plants. Beans, peas, and other legumes can also shade onion plants, making it difficult for them to get the sunlight they need.


Tobacco plants are usually grown like a weed that has no value. So, you can’t expect someone to pay you money to plant tobacco around your house. However, if you produce tobacco in your garden, it can destroy all the other plants. It may also irritate your eyes and nose.

3. Asparagus

To make your garden look beautiful and fresh. But, asparagus is not suitable for you if you plant it near onions because it will reduce the size of onions. So, to grow a healthy garden, you should not plant asparagus in the same space where onions are planted.

4. Cucumber

Most people grow cucumbers for their delicious taste, but some don’t know they should plant cucumber plants near onion plants. This is dangerous for you because growing cucumbers in the same place will negatively impact onion plants.

Hence, if you want a beautiful garden, you should avoid growing these things in the same place. They will create a lot of problems for you.

Onion Planting Tips

If you want to grow onions, you need to plant them properly. Onion seeds are tiny, so you must plant them in well-drained soil. It would help plant them in a greenhouse to keep them warm and moist. Once you grow them, they will give you plenty of fruits and veggies.


So, these were some of the best onion companions you should grow in the same area where you are growing onions. These companion plants will give you excellent results if you grow them together. You can grow these plants in your garden or indoors. So, if you have any queries regarding what to plant next to onions, please share them with us through the comment box below. We will try our best to answer all the questions.

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