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Home » Best & Worst leek companion plants: What to Plant & What to Avoid

Best & Worst leek companion plants: What to Plant & What to Avoid

leek companion plants

What are the best leek companion plants?


Companion planting is a form of organic gardening that involves planting different plants together in order to benefit each other. There are a number of plants that make good companions for leeks, including carrots, parsnips, peppers, tomatoes, celery, strawberries, brassicas (cabbage family), onions and rosemary. Companion planting with leeks can also help keep pests away. For more information on companion planting and how to do it in your home garden, please see our companion planting guide.


Leeks are a cool weather crop that can be planted in early spring. They need a long growing season, about three months before the last frost date. They are hardy plants and can be harvested in the middle of winter. If you live in an area with colder winters, you can start the leek seeds indoors early in the spring and then move them to a cold frame later on.

As for leeks, they are a cool weather crop that can be planted in early spring. The soil should be rich, loamy and fertile to hold moisture well. You can feed them with a water-soluble plant food in late summer to help them overwinter well. Leeks also make the most out of small garden spaces.


companion plants can provide physical support, deter pests, attract pollinators and beneficial predatory insects, and improve the overall health of the garden. Benefits of companion planting can be increased by paying attention to the type of plants you choose to grow together. Plants with bright flowers, lots of pollen, and nectar attract more pollinators like bees which are essential for crop production. Many plants will attract helpful bugs like parasitic wasps and ladybugs to help eradicate insect pests. Plants with intense scents can also be used to repel common garden pests.



Carrots are a root vegetable that is most commonly eaten boiled, roasted, or in a salad. They have a few health benefits, but are mostly known for their nutritional value. Carrots also have some unique properties – they repel most insects and have a strong smell that scares away harmful insects. Additionally, carrots should be planted with leeks because the two vegetables help each other grow.

Companion plants are plants that grow well together and help to improve the health of each other. There are a number of companion plants that can help to repel fly pests. Leeks and carrots are two such plants. They release a gas that confuses the fly pests, preventing them from landing on the plant and laying eggs. However, it is important to note that you should never plant carrots and onions together as they are both susceptible to carrot rust flies and onion fly maggots, respectively.


companion plants are those that are planted near each other to benefit one another. Parsnips and carrots are two vegetables that are good for breaking up soil and improving aeration. They also make good companion plants for leeks, as they help repel pests that may be attracted to leeks. Some other plants that make good companions for leeks include carrots, chili peppers, peppers, tomatoes, celery, strawberries, and beets.


Beets and leeks are two vegetables that have similar needs in the garden. They both like well-drained soil, plenty of sun, and cool weather. Leeks also help to prevent pests that attack beets. You can combine them in the same bed to save space in your garden.


There are many benefits to growing strawberries. They do well with many members of the allium family, which can help repel pests that feed on the plant’s delicious berries. Additionally, they are a great source of food for soil and act as a natural pest control. Finally, alliums are also a great addition to any garden for their ornamental value.

Apple Trees

A guild is a group of plants that work together to provide mutual benefits. When planting fruit trees, it’s important to create a mini-ecosystem around the tree in order to increase its chances of survival and maximize production. By adding leeks to the mix, you can help protect your apple tree from scab and other fungi, as well as pests and disease.


Celery and leeks are companion plants. Companion planting is the practice of growing two or more different plants together in order to benefit from each other. In the case of celery and leeks, these two plants help support each other’s growth. Celery is a bushy plant that can aid leeks’ verticality – it helps give the leek some extra height and space to grow. Consider squeezing the two plants together in your garden plot if you have the room!


The cabbage family, which includes broccoli, kale, and Brussels sprouts, is not a competitor for leeks. In fact, they can enjoy the same gardening environment. However, one caveat is that the strong scent of leeks can keep aphids and cabbage worms away. If you are looking to plant guide: Growing broccoli and kale in containers. The following plants are good companions for leeks: Carrots, Parsnips, Chilly peppers, Peppers, Tomatoes, Celery, Strawberries.


Rosemary & Thyme

Rosemary and thyme are two herbs that are often grown together. They have a variety of benefits for the garden, including repelling insect pests and helping to improve the overall health of leeks. They also look great in the garden and make good companion plants with basil, chamomile, marigolds, and nasturtium.


Chamomile (Matricaria chamomilla) is a plant that is often grown next to leeks. It has a sweet scent that attracts pollinators, and it has anti-fungal and anti-bacterial properties. Chamomile is said to improve the taste of all members of the allium family, including onions, garlic, and leeks.



Nasturtiums are a great trap crop for flea beetles and aphids. The flowers will attract beneficial insects like ladybugs and parasitic wasps, which will help to control the populations of those pests. Nasturtium companion plants can be helpful in keeping your garden healthy and pest-free.


Marigolds are a great companion for leeks. They help to repel harmful insects and also attract beneficial insects like parasitic wasps and ladybugs. The strong aroma of marigolds is a favorite food of slugs, spider mites, and Japanese beetles.


When planting your garden, it’s important to consider what plants will work well together and which ones might have a negative impact on each other. Some plants will stunt the growth of others, or encourage pests and diseases. Leeks should be planted 30 cm apart from other vegetables like garlic that don’t have a negative impact on them but can take up space in your garden.

Beans, Bush Beans & Peas

Beans and peas produce biochemicals that hinder the growth of leeks. When these plants are grown together, the beans and peas will stunt the growth of the leeks. This is because the bacteria found in most soils is killed by alliums including leeks.


When planting asparagus, you will need to make a choice between two types of plants – those that produce flowers (alliums) and those that do not (asparagus). If you choose to plant alliums, you will need to disadvantage the asparagus plants by removing them or by preventing them from flowering. This is because the alliums will take up the space and nutrients that the asparagus needs in order to grow properly. Alternatively, if you do not want to plant alliums, it is best to keep alliums out of your asparagus bed. This is because growing alliums in an asparagus bed would be disadvantageous and not suitable.

Why is a companion plant necessary for growing leeks?

Companion plants are plants that live close to each other and help grow one another. A companion plant for leeks is onions because they both like the same conditions.

What can I grow in my garden near leeks?

Leek is a type of onion that can be planted in the garden. Some plants that work well near leeks are chives, garlic, and thyme.

Tips for Planting and Growing Leek in your Garden

Lemons are a great citrus fruit to plant because they can be planted in spring or fall and will produce delicious lemons throughout the year. Another option for growing lemon trees is with Meyer lemons. Meyer lemons will produce fruit that is sweeter than typical lemons and they can be planted in spring or fall as well.

Can you plant leeks with cucumbers?

No, leeks and cucumbers cannot be planted together.

Can I plant leeks with brassicas?

No, leeks are not compatible with brassicas. They can cross-pollinate, but the resulting offspring will be sterile.
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