What Are the Benefits of Companion Planting in UK’s Organic Gardens?

April 17, 2024

When thinking about the way to successfully grow a vibrant and healthy organic garden, the concept of companion planting likely comes to mind. You may wonder, what is companion planting? Simply put, it is a method of growing plants together in a way that they help each other grow. It’s an age-old practice that has been passed down through generations of gardeners. The concept of companion planting involves pairing compatible plants together in order to derive various benefits such as improved crop yields, pest control, and enhanced plant growth. This article explores the benefits of this practice and how it can transform your gardening experience.

The Power of Companion Planting for Pest Control

One of the principal benefits of companion planting is its ability to aid in pest control. When you plant certain crops together, they can help to deter pests that would otherwise thrive in your garden. This method works because select plants have the ability to repel specific pests, while others can attract beneficial insects that prey on those pests.

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For instance, tomatoes and basil are a classic companion planting duo. Basil is known to repel insects such as whiteflies, thrips, and aphids, which are pests that can often plague tomatoes. This organic method of pest control is not only effective, but it also negates the need for harmful chemical pesticides.

Enhancing Crop Yield and Soil Health

Companion planting also offers the benefit of enhancing the yield of various crops. This is made possible by plants taking up different levels in the soil, utilising nutrients at different rates and therefore not competing with each other.

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A popular example of this is the ‘Three Sisters’ planting technique, a method that has been used by Native Americans for centuries. This technique involves planting corn, beans, and squash together. The corn provides a structure for the beans to climb, eliminating the need for poles. The beans, in return, help to add nitrogen to the soil that benefits the corn. Squash sprawls along the ground, blocking sunlight and thereby preventing the growth of weeds.

This method aids in improving the overall health and fertility of the soil, which is critical for organic gardening. By planting crops in this manner, you are ensuring that the soil is being used efficiently and sustainably.

Boosting Plant Growth and Health

In addition to controlling pests and improving soil health, companion planting can also boost plant growth and health. Certain plants, when grown together, are known to complement each other and promote the growth and development of each other.

Marigolds, for instance, are known to release a chemical into the soil that deters nematodes, pests that can harm a variety of plants. Similarly, planting carrots next to tomatoes can help improve the growth of the tomatoes. The carrots help loosen the soil, allowing the tomato plant’s roots to penetrate the soil more easily.

Promoting Biodiversity in the Garden

Finally, one of the most significant benefits of companion planting is the promotion of biodiversity in your garden. By planting a variety of crops together, you are encouraging a diverse ecosystem to thrive within your garden. This diversity helps to further protect your plants from pests and diseases, as these issues often arise in monocultures where there is a lack of diversity.

Incorporating a variety of plants in your garden not only beautifies your space but also contributes to the health and wellbeing of the local ecosystem. A diverse garden attracts a range of insects, birds, and other wildlife, all of which play an essential role in maintaining a balanced and healthy environment.

In conclusion, the benefits of companion planting extend far beyond simply growing healthy plants. This age-old practice promotes a more sustainable and organic approach to gardening, benefiting the environment as well as the gardener. As you begin to plan your next gardening project, consider integrating the principles of companion planting. Whether you are growing beans, tomatoes, corn, or any other crop, the right companions can make all the difference.

Encouraging Pollination Through Companion Planting

Adopting the practice of companion planting can significantly boost pollination in your garden. Certain plants, when grown together, have the ability to attract a higher number of pollinators such as bees, butterflies, and birds. This, in turn, increases the chances of successful pollination and fruit formation.

A great example of plants that encourage pollination are borage and tomatoes. Borage is a flowering herb that attracts bees, a key pollinator. When planted adjacent to tomato plants, the likelihood of tomato flowers being pollinated increases, resulting in a more plentiful crop.

Other examples include planting flowering herbs like dill, fennel, and parsley which are known to attract beneficial insects. These insects not only contribute to pollination but also act as natural pest controllers by preying on pest insects. This method, often referred to as ‘trap cropping’, is a stellar example of how companion planting can provide a natural and organic alternative to chemical pest control in your vegetable garden.

Apart from attracting beneficial insects, certain companion plants like beans and corn from the Native American ‘Three Sisters’ technique not only help each other grow but also attract different kinds of pollinators, thus promoting cross-pollination.

The Role of Companion Planting in Protecting Fruit Trees

Companion planting also has a significant role in protecting fruit trees in your garden. Certain plants have the power to repel pests that are notorious for decimating fruit trees. One such enemy is the codling moth, a pest that infests apple trees. Planting chives at the base of apple trees has been known to deter these pests, providing a natural and organic line of defence.

Cover crops such as white clover can be grown around fruit trees to not only improve soil health but also attract predatory insects that feed on pests known to harm fruit trees. The clover flowers are a nectar source for these beneficial insects, making your fruit trees a less inviting target for pests.

In addition, companion plants like daffodils and narcissus when planted around fruit trees can deter pests like rodents from digging and damaging the roots. This is due to the bulbs of these plants being toxic to these pests.

Moreover, the use of companion plants around fruit trees can improve soil health by adding organic matter and preventing soil erosion.


Companion planting offers multifaceted benefits that make it an indispensable tool for any gardener, whether a novice or a seasoned expert. The practice not only helps in controlling pests, enhancing crop yield, soil health, and plant growth but also promotes biodiversity, increases pollination, and protects fruit trees.

The beauty of companion planting lies in its simplicity and the natural harmony it promotes. It reminds us that in nature, everything is interconnected. Every plant, every insect, and every bird has a role to play in the grand scheme of things.

The age-old wisdom passed down through generations, of pairing compatible plants together, can assist us in creating a vibrant, productive, and sustainable garden. As we look towards the future, practices such as these will help not only our gardens but the planet as a whole. After all, the principles of companion planting are not just about growing plants together — it’s about growing together with nature.