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Master your autumn garden with these expert companion planting tips

Companion planting is all about creating plant communities which have mutual benefits to each other.

By LLM Reporters   |  

Autumn is a magical time for gardeners. The air gets crisp, the colours turn warm, and the garden transitions into a new season of growth. If you’re an experienced gardener looking to optimise your autumn garden, companion planting is your secret weapon. This technique not only maximises space but also enhances the health and yield of your plants. Here, we explore the very best tips for companion planting in your garden this autumn. So get ready to elevate your gardening game!

Why companion planting works wonders

Nasturtiums, companion plants, growing as a trap crop for attracting aphids or squash bugs from vegetable plants.
Companion planting is more than just placing plants together – it’s about creating a harmonious ecosystem

Companion planting is more than just placing plants together – it’s about creating a harmonious ecosystem. This method leverages natural relationships between plants to boost growth, deter pests, and improve soil health. When done correctly, it can transform your garden into a thriving, self-sustaining paradise.

Enhancing plant health

Certain plant combinations can enhance the overall health of your garden. For instance, aromatic herbs like rosemary and sage can ward off pests that might otherwise plague your vegetables. The natural oils in these herbs act as repellents, keeping unwanted insects at bay.

Maximising space

For gardeners with limited space, companion planting offers a clever solution. By planting tall, sun-loving plants alongside shorter, shade-tolerant ones, you can maximise the use of vertical and horizontal space. This approach ensures that every inch of your garden is productive.

Boosting soil nutrients

Some plants, like legumes, have the unique ability to fix nitrogen in the soil. When paired with nitrogen-hungry plants like leafy greens, they create a nutrient-rich environment that’s perfect for sustained growth. This natural fertilisation reduces the need for chemical interventions.

Ideal autumn flowers for companion planting

Marigold is also known as a companion plant that activates vegetables by planting it nearby
Marigolds repel nematodes and other harmful insects, making them ideal companions for vegetables like tomatoes and peppers

This season is an excellent time to introduce flowers for autumn planting to your garden. These blooms not only add beauty but also offer practical benefits when strategically placed.

Marigolds

Marigolds are a gardener’s best friend. They repel nematodes and other harmful insects, making them ideal companions for vegetables like tomatoes and peppers. Their bright, cheerful blooms also attract beneficial insects like ladybirds and bees.

Chrysanthemums

These vibrant flowers are known for their pest-repelling properties. Plant chrysanthemums near your fall vegetables as their strong scent is a natural deterrent, keeping your garden pest-free.

Pansies

Pansies thrive in cooler autumn temperatures and provide a splash of colour. When planted near leafy greens and brassicas, they can help attract pollinators and beneficial insects. Plus, their edible flowers add a unique touch to salads and garnishes.

Best autumn planting bulbs for companion planting

Bright daffodils at the arrival of spring season
Daffodils are excellent for naturalising areas of your garden

Autumn planting bulbs are a fantastic addition to any autumn garden. They are easy to plant and offer stunning blooms that emerge in the following spring. Here are some bulbs that pair well with other plants.

Daffodils

Daffodils are excellent for naturalising areas of your garden. Their toxic bulbs repel rodents, protecting other nearby plants. Plant them around the edges of your garden beds to create a protective barrier.

Tulips

Tulips add a burst of colour and elegance to your garden. When planted alongside garlic or onions, they benefit from the pest-repelling properties of these alliums. This combination keeps your tulips safe from aphids and other pests.

Crocuses

Crocuses are among the first flowers to bloom in spring. Their early emergence provides much-needed nectar for pollinators just waking up from winter. Plant them near fruit trees or berry bushes to support the early pollinators that help your garden thrive.

Top companion plants for autumn vegetables

Carrot vegetable grows in the garden in the soil organic background closeup
Carrots and leeks are a classic companion planting duo

Preparing your garden for autumn vegetables? Here are some top companion plants to consider:

Spinach and strawberries

Spinach and strawberries make a perfect pair. Spinach’s low-growing nature provides ground cover, helping to retain moisture and suppress weeds. In return, strawberries’ shallow roots don’t compete with spinach for nutrients, creating a harmonious partnership.

Brassicas and dill

Brassicas, such as cabbage and broccoli, benefit significantly from dill. Dill attracts predatory insects like wasps, which keep cabbage worms and aphids under control. This natural pest management helps ensure your brassicas remain healthy and productive.

Carrots and leeks

Carrots and leeks are a classic companion planting duo. Leeks produce a scent that deters carrot flies, while carrots help loosen the soil for leeks to grow more easily. This mutually beneficial relationship results in healthier, more robust plants.

Companion planting for pest control

Colorado beetle on a sheet of potato bush in the garden
One of the greatest advantages of companion planting is its ability to naturally control pests

One of the greatest advantages of companion planting is its ability to naturally control pests. Here are some effective plant pairings for an autumn garden that’s virtually pest-free.

Garlic and roses

Garlic is a powerful pest deterrent for most common garden pests. When planted near roses, garlic helps protect these beautiful flowers from infestations, ensuring they remain vibrant and healthy.

Basil and tomatoes

Basil and tomatoes are a match made in heaven. Not only do they thrive together, but basil also repels tomato hornworms and aphids. This pairing enhances the flavour of tomatoes, making them sweeter and more aromatic.

Nasturtiums and cucumbers

Nasturtiums are a great trap crop for pests. Planting them near cucumbers lures pests away, protecting your valuable cucumber plants. Additionally, nasturtiums attract beneficial insects that help keep your garden in balance.

Tips for successful companion planting in autumn

Brunnera "Jack Frost" planted in mixed border iwith pine bark pieces mulch on the ground. Companion planting in garden design
Consider each plant’s space, light, and nutrient requirements

To get the most out of your autumn garden, it’s essential to follow some best practices for companion planting.

Plan your layout

Before planting, take time to plan your garden layout. Consider each plant’s space, light, and nutrient requirements. Use grid paper or an online garden planner to map out where each plant will go.

Rotate crops

Crop rotation is vital for maintaining soil health and preventing disease. Avoid planting the same family of plants in the same spot each year. Rotate them to different parts of your garden to reduce the risk of soil depletion and pest buildup.

Monitor your garden

Regularly check your garden for signs of stress or pest activity. Early detection allows for quick intervention, preventing minor issues from becoming major problems. Keep a garden journal to track plant health and growth patterns.

Incorporating herbs into your autumn garden

this is a thyme plant.
Thyme is a low-growing herb that serves as excellent ground cover

Herbs are not only culinary delights but also fantastic companions for many garden plants. Here’s how to incorporate them effectively.

Thyme

Thyme is a low-growing herb that serves as excellent ground cover. It helps retain soil moisture and repels cabbage worms. Plant thyme near brassicas and other leafy greens for a healthier garden.

Oregano

Oregano is a perennial herb that attracts pollinators and beneficial insects. Its strong aroma deters pests, making it a great companion for tomatoes and peppers. Plus, it adds a flavorful punch to your autumn harvest recipes.

Mint

Mint is known for its vigorous growth and pest-repelling properties. Plant mint in containers to prevent it from spreading uncontrollably. Place the containers near susceptible plants like carrots and radishes to keep pests at bay.

Creating wildlife habitats in your garden

bigstock-Bluebird-Leaving-The-Birdhouse-5107405
Install birdhouses to attract insect-eating birds

Encouraging wildlife in your garden can enhance biodiversity and improve plant health. Here’s how to create a welcoming habitat.

Birdhouses

Install birdhouses to attract insect-eating birds. Birds help control pest populations, reducing the need for chemical interventions. Place birdhouses in quiet, sheltered areas of your garden.

Bee hotels

Provide bee hotels to support solitary bees. These bees are excellent pollinators and play a vital role in the health of your garden. Position bee hotels in sunny spots, away from strong winds.

Water features

Add water features like bird baths for small ponds. These features attract beneficial wildlife, including amphibians and insects. Ensure water sources are clean and accessible, especially during dry periods.

The bottom line

Mastering companion planting in your autumn garden can lead to a more productive and resilient garden. By understanding and utilising the natural relationships between plants, you can create a thriving ecosystem that benefits both your plants and the environment.

Whether you’re planting marigolds to repel pests or using mulch to enrich your soil, each step you take in companion planting contributes to a healthier, more beautiful garden.