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Companion Plants for Trees: The Secret to a Thriving Garden

companion plants for trees

Trees are among the most treasured and essential elements of any garden or landscape. They provide shade, oxygen, and beauty, and also help to control erosion and reduce noise pollution. However, planting trees alone is not enough to create a thriving ecosystem. Companion plants can help to enhance the health and vitality of trees, while also adding color and diversity to your garden.

The Benefits of Companion Planting

Companion planting involves growing different plants together in the same area to benefit each other. When it comes to companion planting with trees, there are several benefits, including:

Nutrient Cycling

Different plants have different nutrient requirements. By planting a variety of plants around your trees, you can help to ensure that all the necessary nutrients are being used efficiently. For example, leguminous plants like clover and beans can fix nitrogen from the air and make it available to other plants, including trees.

Pest Control

Certain plants can help to repel pests that may be harmful to trees. For instance, marigolds and nasturtiums are known to deter aphids and other pests. Additionally, some plants attract beneficial insects like ladybugs and lacewings, which can help to keep pest populations under control.

Soil Health

Companion planting can help to improve soil health by reducing soil erosion and compaction. Deep-rooted plants like comfrey and yarrow can help to break up compacted soil and improve drainage, while groundcovers like thyme and chamomile can help to prevent erosion and retain moisture.

Choosing Companion Plants for Trees

When selecting companion plants for your trees, it's important to consider factors like the tree species, soil type, and sun exposure. Here are some tips to help you choose the right plants:

Tree Species

Different tree species have different needs and preferences when it comes to companion plants. For example, fruit trees like apple and pear may benefit from plants that attract pollinators, while conifers like pine and spruce may prefer plants that help to acidify the soil.

Soil Type

Plants grow best in soils that meet their specific nutrient requirements. For instance, plants that thrive in acidic soils, like blueberries and rhododendrons, may not do well in alkaline soils. Make sure to choose companion plants that are adapted to the soil conditions in your garden.

Sun Exposure

Plants also have varying requirements for sunlight. Some, like sunflowers and zinnias, need full sun to thrive, while others, like ferns and hostas, prefer shady areas. Be sure to choose companion plants that are suited to the amount of sunlight your trees receive.

Companion Plants for Specific Tree Species

Citrus Trees

Citrus trees like lemon, lime, and orange can benefit from companion plants like:

  • Mint – repels pests and attracts beneficial insects
  • Marigold – deters aphids and other pests
  • Basil – improves flavor of fruit and repels pests

Apple Trees

Apple trees can benefit from companion plants like:

  • Lupines – fix nitrogen and improve soil quality
  • Nasturtiums – deter pests and attract beneficial insects
  • Chives – improve flavor of fruit and repel pests

Pine Trees

Pine trees can benefit from companion plants like:

  • Azaleas – acidify soil and add color to the landscape
  • Rosemary – deters pests and adds fragrance to the garden
  • Blueberries – acidify soil and produce delicious fruit

Tips for Successful Companion Planting

Plan Ahead

Before planting, take some time to research which plants are best suited to your trees and growing conditions. Create a planting plan that takes into account the specific needs of each plant.

Plant Diversity

A diverse planting scheme is key to successful companion planting. Choose plants with different heights, root depths, and nutrient requirements to create a balanced ecosystem.


Companion planting requires ongoing maintenance, including regular watering, pruning, and fertilizing. Make sure to monitor your plants for signs of pests or disease and take action as needed.

Companion planting is a simple but effective way to enhance the health and vitality of your garden trees. By choosing the right plants and creating a diverse ecosystem, you can improve soil quality, repel pests, and attract beneficial insects. With a little planning and care, your trees and their companions will thrive and provide beauty and benefits for years to come.


Q: Can I plant any type of plant as a companion to my trees?

A: No, it's important to choose companion plants that are well-suited to your tree species, soil type, and sun exposure. Research which plants work best in your area before planting.

Q: Do I need to plant companion plants at the same time as my trees?

A: No, you can add companion plants to your garden at any time. Just make sure to choose plants that are appropriate for the growth stage of your trees.

Q: Can companion plants be used to control pests without using chemical sprays?

A: Yes, certain companion plants like marigolds and nasturtiums can help to deter pests naturally, reducing the need for chemical sprays.

Q: How often should I fertilize my companion plants?

A: The frequency of fertilization depends on the specific nutrient requirements of each plant. Make sure to research the needs of each plant before fertilizing.

Q: What are some good groundcover options for companion planting?

A: Groundcovers like thyme, chamomile, and clover can help to prevent erosion and retain moisture, while also adding color and diversity to your garden.

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