April 27


Companion Plants for Onions: How to Maximize Your Onion Harvest by Pairing them with the Right Vegetables

Onion companion planting – what to grow with onions to ensure a bumper crop

When it comes to growing onions, gardeners have found that planting certain vegetables and herbs alongside them can have many benefits. One such combination is tomatoes and onions, which not only have a delicious taste when cooked together, but also help each other in their growth. For example, parsley is a member of the onion family and is often confused with it, but it is actually a separate herb. Planting parsley near onions can help deter carrot flies, a common pest in onion gardens.

Another great combination is onions and chamomile. Chamomile is a herb that has many benefits for the garden. It has a wide range of uses, from deterring pests to improving the soil. Planting chamomile near onions can help with their growth and deter pests such as onion beetles. The combination of the two plants also creates a pleasant smell in the garden.

If you’re looking to maximize space in your garden, planting onions with other vegetables can be a great idea. For example, planting onions with cucumbers can ensure that both crops have enough room to grow. Onions can help deter pests that are harmful to cucumbers, such as aphids. On the other hand, cucumbers provide shade for onion plants, helping to keep them cool in the summer months.

There are also some herbs that benefit from being planted alongside onions. For instance, planting onions with rosemary can enhance the flavor of both plants. Rosemary is a great herb to have in the garden, as it can deter pests and improve the overall health of your plants. Similarly, planting onions with thyme can help deter pests and improve the growth of both plants.

In conclusion, companion planting is an important practice for gardeners to consider when growing onions. By planting certain vegetables and herbs alongside onions, you can ensure a bumper crop and a healthy garden. Whether you’re mixing onions with tomatoes, parsley, chamomile, or other plants, the combination can provide benefits in terms of pest control, improved soil, and enhanced flavors. So, when planning your onion garden, don’t forget to think about the plants that will complement and help them thrive!

Onion companion planting

When it comes to growing onions, expert gardeners know that companion planting is the perfect way to ensure a bumper crop. Companion planting involves growing specific plants alongside onions to provide benefits such as improving soil health, deterring pests, and enhancing overall growth and yield.


One of the most popular companion plants for onions is tomatoes. Planting tomatoes near onions helps to deter onion flies due to their strong smell. In return, onions can help to deter pests that commonly attack tomatoes, such as whiteflies and aphids.


Another great companion plant for onions is chamomile. Chamomile helps to improve soil health by adding nutrients and preventing soil-borne diseases. It also attracts beneficial insects like hoverflies and lacewings, which prey on pests that can harm onions.


Carrots and onions make a great combination in the garden. Carrots are shallow-rooted and do not compete with onions for nutrients, making them perfect planting companions. Additionally, onions can help to deter carrot flies, which are a common pest for carrots.


Onions are part of the Allium family, which includes plants like garlic and leeks. Growing other Allium family members, such as chives, garlic, and leeks, can help to deter onion beetles. These beetles can damage onion crops by feeding on leaves and spreading diseases. The strong smell of other Allium plants masks the scent of onions, making it harder for the beetles to locate them.


There are many herbs that can benefit onion plants when planted nearby. Herbs like basil, parsley, and thyme help to repel pests such as aphids and onion flies. Their fragrant leaves also add a delicious aroma to the garden.


Believe it or not, roses and onions are a surprisingly good pairing in the garden. Roses are known to attract rose beetles, which can be harmful to the plants. However, when planted with onions, the strong smell of the onions can confuse and deter these beetles, protecting both the roses and the onions.

In order to create a healthy and thriving onion garden, it is important to plan your companion planting carefully. Think about which plants will provide the most benefits to your onions, while also ensuring they are compatible in terms of soil and climate requirements. By making the right combination, you can ensure that your onions will have the best chance of success.

So, if you’re looking to maximize the health and yield of your onion crop, consider companion planting with these beneficial plants. Not only will they help improve the overall well-being of your onions, but they will also add beauty and variety to your garden.

What can I plant with onions

Onions are a great addition to any garden. They are part of the allium family, which also includes garlic, leeks, and shallots. Not only do they add flavor to your meals, but they also have many health benefits. They are rich in nutrients and antioxidants, and they may have cancer-fighting properties.

In order to get the most out of your onion crop, it’s important to consider what to plant alongside them. Some plants can actually help onions grow better and keep pests at bay.

Companion plants for onions

There are a few vegetables and herbs that make great companions for onions:

  • Carrots: Carrots and onions are a classic combination. Carrots help deter onion flies, while onions help repel carrot flies. Plus, their flavor profiles complement each other well.
  • Parsley: Growing parsley near onions can help improve their growth. It is believed that the smell of parsley confuses onion pests and keeps them away.
  • Tomatoes: Tomatoes and onions are often planted together. Tomatoes can help repel onion beetles, while onions help keep aphids away from tomatoes. This combination is not only practical but also visually appealing.
  • Cucumbers: Onions and cucumbers are good companions in the garden. Cucumbers provide a living mulch that helps keep the soil cool and moist, which benefits onion growth.

Other companion plants

While the above plants are some of the best companions for onions, there are also many others that can be beneficial. Here are a few more options:

  • Chamomile
  • Beets
  • Thompson onions
  • Marigolds
  • Spinach

What to avoid planting with onions

Onions do have some plants they don’t get along with. They don’t like competition from certain crops or plants that have similar growing requirements. Avoid planting onions near:

  • Beans
  • Peas
  • Cabbage
  • Broccoli
  • Garlic

By planning your onion companion planting carefully, you can create a healthy and thriving garden. Companion plants not only provide benefits for the growth of your onions, but they also add beauty and variety to your garden.

Onion companion planting – with vegetables

When it comes to growing onions, companion planting with vegetables can be a great way to maximize your crop and create a healthy garden. By choosing the right combination of vegetables to plant alongside onions, you can help them grow better and even deter pests.

The Benefits of Companion Planting

Companion planting is the practice of growing different plants together to take advantage of their natural relationships. When it comes to onions, there are several vegetables and herbs that can be great companions.

Onions are part of the Allium family, which also includes garlic and leeks. These plants have a strong fragrance that repels pests like aphids and carrot flies. By growing onions alongside other vegetables, you can create a natural barrier to keep these pests away.

Additionally, some vegetables and herbs can provide benefits to onions by improving their growth and flavor. For example, chamomile is known to make onions more fragrant and delicious when grown together.

Companion Vegetables for Onions

When planning your onion companion planting, consider adding the following vegetables:

  • Carrots: Carrots and onions make a perfect combination. Planting these two together not only saves space but also helps deter each other’s pests.
  • Cucumbers: Cucumbers are great companions for onions, as they both have similar growing requirements. Plant cucumbers around the onions to create a natural screen.
  • Tomatoes: Onions and tomatoes are not only a delicious combination in cooking but also in the garden. Tomato plants can help deter onion pests and vice versa.

Tips for Successful Onion Companion Planting

Here are some important tips to keep in mind when companion planting with onions:

  • Choose vegetables that have similar growing requirements to ensure they thrive together.
  • Rotate your crops each year to prevent diseases and pest buildup.
  • Plant onions and their companion vegetables in well-drained soil with plenty of organic matter.
  • Provide sufficient spacing between the plants to allow for proper growth and airflow.
  • Consider interplanting with herbs like rosemary and thyme, which can repel pests and improve onion growth.

By following these tips and incorporating onion companion planting into your garden, you can ensure a bumper crop of healthy and delicious onions, while also making the most of your growing space.


Onion companion planting with vegetables is a great way to maximize the benefits of your garden. By choosing the right companions and following some simple advice, you can improve your onion crops, deter pests, and create a thriving garden. So, why not give onion companion planting a try and see the results for yourself?

Onion companion planting – with herbs

When it comes to onion companion planting, herbs can be a great addition to your garden. Not only do they provide a variety of benefits, but they also make for a visually appealing and flavorful combination. In this article, we will explore the different herbs that can be grown alongside onions to ensure a bumper crop.

The benefits of onion companion planting with herbs

Companion planting is an important practice in gardens as it allows plants to support and benefit from each other. When onions are planted with herbs, they can enjoy many advantages. For starters, herbs can help deter pests and diseases that may harm the onion crop. They can also attract beneficial pollinators and provide a natural barrier against predators.

In addition to these pest control benefits, herbs also work well with onions because they have similar nutrient requirements. This means that the two plants can grow together and compete less for the same nutrients, ensuring healthy growth for both.

Popular herb and onion combinations

There are many different herbs that can be planted alongside onions to complement their growth. Here are a few popular combinations:

  • Rosemary and onions: Rosemary is known for repelling carrot flies, which can damage onion crops. Planting rosemary around the onions can help deter these pests and ensure healthier plants.
  • Parsley and onions: Parsley is a member of the carrot family and makes a perfect companion plant for onions. They share similar growth habits and can be planted together to maximize space in the garden.
  • Chamomile and onions: Chamomile not only adds a pleasant smell to the garden, but it also has insect-repelling properties. Planting chamomile around onions can help keep pests away and promote better growth.

Tips for onion companion planting with herbs

Tips for onion companion planting with herbs

When planning your garden, keep in mind the specific needs of both onions and herbs. Onions require plenty of space to grow, so make sure to give them enough room to develop their bulbs. Herbs, on the other hand, can be grown in a wide range of containers or in smaller areas. This flexibility allows for better space planning and utilization.

It’s also important to note that some herbs may confuse pests by masking the smell of onions, making them less attractive to pests. This can be an effective way to protect your onion crop from insects.

In conclusion, growing herbs alongside onions can be a beneficial practice in the garden. With the right combination of herbs, you can ensure healthier crops, deter pests, and create a more diverse and delicious harvest. So, consider adding herbs to your onion companion planting and reap the rewards of this beneficial partnership.

Onion companion planting – with flowers

When it comes to onion companion planting, many gardeners focus on vegetables and herbs. However, adding flowers to your onion garden can have great benefits too.

One of the main reasons to plant flowers alongside your onions is to improve the overall health and productivity of your garden. Some flowers have properties that can help deter pests and attract beneficial insects, which in turn can help protect your onion crops.

Deterrence and protection

Some flowers, such as marigolds, calendula, and nasturtiums, have strong scents that can confuse pests like onion flies and cucumber beetles. By planting these flowers around your onion beds, you create a natural barrier that can deter these pests from your crop.

Other flowers, like chamomile and thompson parsley, attract beneficial insects like ladybugs and lacewings that feed on pests. These insects can help control populations of aphids and other harmful pests that may be present in your onion garden.

Complementary growth and soil improvement

Complementary growth and soil improvement

Flowers can also improve the growth and health of your onions by enhancing the quality of the soil. Some flowers, such as daisies, delphiniums, and zinnias, have deep root systems that can help break up compacted soil, allowing air and water to better reach the onion roots.

In addition, flowers like sunflowers and borage can add nutrients to the soil as they age and decompose. This enriches the soil and provides a better growing environment for your onions.

Planning and combinations

When planning your onion companion planting with flowers, it’s important to consider which flowers work well together and with onions. Some flowers, like chamomile, have a wide range of companions, making them versatile options for any garden.

Another important factor to consider is the spacing between flowers and onions. Onions need some space to grow properly, so avoid planting flowers too close to the onion bulbs. However, flowers can be planted around the onion beds to create a beautiful and beneficial border for your garden.

Final advice

By incorporating the right flowers into your onion companion planting, you can ensure a healthy and productive garden. Take into account the specific needs of your onions and choose flowers that will complement their growth.

Remember to group flowers with similar needs together and consider the overall layout of your garden. By following these tips and experimenting with different flower combinations, you can create a vibrant and diverse garden that will not only benefit your onions but also brighten up your outdoor space.

What vegetables should not be planted with onions

What vegetables should not be planted with onions

When planning your garden, it can be helpful to know which vegetables should not be planted with onions. Some combinations can help your garden thrive, while others can hinder the growth and productivity of your crops.

For example, planting onions near tomatoes is not recommended. Onions and tomatoes belong to the same plant family, so they can compete for space, nutrients, and sunlight. This can result in stunted growth and reduced yields for both plants.

Carrots and onions also do not make a good planting combination. Although they are often used together in cooking, they are not ideal companions in the garden. Onions have a strong smell which can deter carrot flies, but they can also inhibit the growth of carrots and make them more susceptible to disease.

Cucumbers are another vegetable that does not mix well with onions. Cucumbers are heavy feeders and can deplete the soil of nutrients, leaving the onions struggling to get the nutrients they need to thrive. Additionally, the strong scent of onions can affect the flavor of cucumbers, making them less delicious.

Onions also do not thrive when planted near members of the cabbage family, such as broccoli, cauliflower, and Brussels sprouts. These plants release chemicals into the soil that can inhibit the growth of onions. It is best to keep onions and cabbage family crops separate in the garden.

Roses and onions may seem like an odd combination, but they can actually be beneficial to each other. Onions can help deter pests that may damage roses, and roses can provide a beautiful, fragrant backdrop for the garden.

Herbs, on the other hand, can be great companions for onions. Herbs like parsley and chamomile can enhance the flavor of onions and help deter pests. Planting them together can also save space in your garden.

In conclusion, when planning your onion companion planting, it is important to consider the vegetables that should not be planted with onions. Avoid planting them near tomatoes, carrots, cucumbers, and members of the cabbage family. Instead, consider planting them with herbs and other compatible vegetables to ensure a better harvest and a more flourishing garden.

Can I plant onions next to tomatoes

When planning your garden layout, it’s important to consider what plants grow well together and which ones should be kept apart. So, can you plant onions next to tomatoes?

The short answer is yes, you can plant onions next to tomatoes. In fact, onions can actually benefit tomatoes and vice versa when they are grown together. Onions can help deter pests and diseases that often affect tomatoes, while tomatoes can help deter pests that commonly bother onions.

Onions are known for their strong smell, which can confuse and deter many pests. Planting onions near tomatoes can help protect the tomatoes from pests like aphids, beetles, and whiteflies. Onions also release compounds into the soil that help protect against certain diseases, such as fungal infections.

Tomatoes, on the other hand, can help deter some pests that commonly bother onions. For example, planting tomatoes near onions can help deter onion maggots and thrips. The shade provided by tomato plants can also help keep the soil around onions moist in hot summer months.

One important thing to keep in mind when planting onions and tomatoes together is spacing. Onions need plenty of space to grow, so make sure to leave enough room around each onion plant. Tomatoes also need space for air circulation, so be sure to leave enough space between tomato plants as well.

In addition to onions and tomatoes, there are other plants that can be beneficial when planted together. For example, herbs like parsley and chamomile can enhance the growth and flavor of onions and tomatoes. Roses and marigolds can also provide some benefits.

While there are many benefits to planting onions and tomatoes together, it’s also important to consider the needs and preferences of other plants in your garden. Some vegetables and flowers may not thrive when grown near onions or tomatoes.

Overall, companion planting onions and tomatoes is a great strategy to promote healthy growth and deter pests. Just be sure to consider the specific needs of each plant and plan your garden accordingly. With proper planning and care, you can enjoy a bumper crop of delicious onions and tomatoes!

Can I plant onions next to cucumbers?

When planning your garden, it’s important to consider companion planting. This practice involves planting certain vegetables, herbs, or flowers together to promote better growth and ensure healthy crops. While there are many different companion planting combinations, one common question is whether it’s possible to plant onions next to cucumbers.

Cucumbers and onions can be planted together in the same garden space, and they can actually benefit from being grown in close proximity. Onions, with their fragrant smell and delicious taste, have many benefits when it comes to companion planting. They can help deter pests such as beetles, while also adding nutrients to the soil.

Onions belong to the Allium family, which also includes garlic, shallots, and chives. These members of the Allium family produce a strong smell that can confuse pests and deter them from damaging the crops. By planting onions alongside cucumbers, you can help protect the cucumber plants from pests like cucumber beetles.

In addition to pest control, onions also have other benefits when planted near cucumbers. Onions have a wide range of nutrients that they release into the soil as they grow. These nutrients can be absorbed by nearby cucumbers, leading to healthier and more abundant crop production.

Furthermore, planting onions and cucumbers together can help maximize space in the garden. Both vegetables have a relatively low profile, which means they don’t take up much vertical space. By planting them together, you can make the most of your garden’s available area.

It’s worth noting that cucumbers have a relatively high water requirement, especially during the summer months. This means that they need plenty of water to keep their growth healthy and productive. Onions, on the other hand, prefer drier soil conditions. Therefore, it’s important to ensure that the soil is well-drained to meet the needs of both vegetables.

Some gardeners also recommend planting parsley alongside cucumbers and onions. Parsley can help improve the overall health of all three plants, and its smell can help mask the aroma of onions for those who don’t enjoy the strong onion scent.

In conclusion, planting onions next to cucumbers can be a great combination for your garden. The onions help deter pests, add nutrients to the soil, and maximize space, while the cucumbers enjoy the benefits of companion planting. Just keep in mind the different water requirements of these two vegetables and consider adding parsley to enhance the overall health of your garden.

Can I plant onions and peppers together

When planning your garden, it’s important to consider companion planting – the practice of growing certain plants together to benefit each other. Onions and peppers are a great combination that can help improve the growth and flavor of both crops.

Onions are a member of the allium family, which also includes garlic, leeks, and shallots. They have a strong scent that can help deter pests from your garden, making them a great companion for many vegetables.

Peppers, on the other hand, are part of the nightshade family, along with tomatoes and eggplants. They have similar growth requirements and can thrive when planted together.

One of the benefits of planting onions with peppers is that they can help deter pests that may harm your pepper plants. Onions emit a pungent smell that can confuse and repel pests, such as aphids and spider mites. Additionally, the strong smell of onions can mask the scent of peppers, making it harder for pests to locate the plants.

In addition to deterring pests, planting onions and peppers together can also benefit the growth of both crops. Onions have a wide root system that can help improve soil structure and nutrient availability. This can result in healthier plants and better yields for both onions and peppers.

When planting onions and peppers together, it’s important to consider the spacing of the plants. Onions require a lot of space and should be given enough room to grow. Peppers, on the other hand, can be planted closer together. Consider creating a row of onions with a row of peppers alongside to ensure both crops have enough space to grow.

It’s also worth noting that onions and peppers have different growth cycle lengths. Onions are typically planted in the early spring and harvested in the summer, while peppers are planted in the summer and harvested in the fall. This timing can help maximize the use of space in your garden and ensure a continuous supply of fresh vegetables throughout the growing season.

Overall, planting onions and peppers together is a great combination that can help deter pests, improve soil health, and result in better yields. Remember to consider the spacing and timing of planting, and enjoy the delicious flavors that these two vegetables can bring to your garden.


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