Accelerate The Garden With Oregano Companion Planting

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In the enchanting world of gardening, there’s a timeless dance among plants, where companionship takes center stage. One herb that plays a stellar role in this green choreography is none other than the aromatic oregano. Oregano companion planting can take your garden to new heights with some of the amazing benefits, offered both to oregano and from oregano!

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Let’s embark on a journey into the heart of companion planting, exploring why oregano is the maestro of this symphony and revealing the detailed ensemble of plants that twirl and thrive alongside it.

Want to start your oregano from seed? Check out our step-by-step guide! <<—

A thriving garden is something every gardener desires. Often in the heart of the lush greens you will find that each plant contributes something unique, enhancing the vitality of its neighbors. That’s the magic of companion planting. It’s not just about aesthetics; it’s a strategic alliance among plants that benefits the entire ecosystem and allows the garden to thrive. Oregano, with its aromatic prowess and special attributes, takes the lead in this horticultural ballet.

what not to plant with oregano

Oregano Benefits In Companion Planting

When the key components of oregano are used in a way to enhance the garden as a whole, it is often found that this aromatic herb holds some amazing benefits to other plants.

Pest-Repellent Prowess

Oregano’s fragrant personality doesn’t just appeal to humans; it repels pesky insects too. Aphids and spider mites, be warned! Planting oregano strategically creates a natural shield against these unwelcome guests.

Disease-Defying Magic

Oregano possesses antimicrobial properties primarily due to its essential oils, such as thymol and carvacrol. These compounds make oregano effective in protecting against various plant diseases caused by bacteria, fungi, and other microorganisms. Some of the plant diseases that oregano can help protect against include:

  1. Powdery Mildew: Oregano’s antimicrobial properties can inhibit the growth of powdery mildew, a common fungal disease that forms a white, powdery substance on plant surfaces, affecting a wide range of plants.
  2. Downy Mildew: Another fungal disease, downy mildew, causes yellow spots on leaves. Oregano’s antimicrobial effects can help prevent the spread and severity of downy mildew.
  3. Botrytis Blight (Gray Mold): Oregano’s compounds can combat Botrytis cinerea, a fungus responsible for gray mold that affects various plants, especially in humid conditions.
  4. Root Rot: Oregano’s antimicrobial properties extend to the soil, where they can inhibit the development of root rot caused by pathogenic fungi like Phytophthora and Rhizoctonia.
  5. Bacterial Wilt: Oregano may offer protection against bacterial wilt, a disease that affects the vascular system of plants, leading to wilting and eventual death.
  6. Fusarium Wilt: This soil-borne disease caused by Fusarium fungi can be suppressed by oregano’s antimicrobial compounds, contributing to the plant’s resistance against wilt.

Soil Enrichment

Oregano’s root system plays a pivotal role not only in its own growth but also in enhancing the overall health of the soil. As the roots of oregano delve into the earth, they release various compounds that contribute to soil enrichment, creating a nurturing environment for neighboring plants.

  • Essential Oils: Just as the essential oils help to deter plant disease, they can also benefit the soil itself. When these oils are released into the soil, they exhibit antimicrobial properties, helping to control soil-borne pathogens. This contributes to a healthier soil microbiome by reducing the prevalence of harmful bacteria and fungi that can negatively impact plant roots.
  • Organic Matter: Oregano’s roots contribute to the decomposition of organic matter in the soil. As the plant takes up nutrients from the soil, it releases organic compounds back into the earth during its natural growth cycle. This breakdown of organic matter enriches the soil with valuable nutrients, fostering a nutrient-rich environment that benefits neighboring plants.
  • Nitrogen Fixation: Some plants, including certain varieties of oregano, have the ability to form symbiotic relationships with nitrogen-fixing bacteria. These bacteria convert atmospheric nitrogen into a form that plants can use for their growth. By facilitating nitrogen fixation, oregano enhances soil fertility, providing an essential nutrient for the development of nearby plants.
  • Improved Soil Structure: Oregano’s root system aids in improving soil structure. The roots create channels and crevices in the soil, promoting better aeration and water infiltration. This enhanced soil structure facilitates the movement of water, air, and nutrients, creating an environment where plant roots can more effectively access the resources they need for optimal growth.
  • Microbial Activity: Oregano roots release compounds that stimulate beneficial microbial activity in the soil. This microbial community helps break down organic matter, releasing additional nutrients and creating a dynamic ecosystem that supports plant health.

Natural Mulch

Most gardeners know that mulching (covering) the soil is the best thing to do in order to maintain moisture, suppress weeds, and offer all around soil enhancement. Using a plant mulch, such as oregano, is amazing for things like raised beds and pots. As oregano spreads, it forms a lush, low-growing carpet. This acts as a natural mulch, helping to retain moisture in the soil, reducing weed growth, and providing a protective layer for the roots of surrounding plants.

What To Plant With Oregano?

Companion planting involves strategically placing different plants together to enhance each other’s growth, repel pests, and provide mutual benefits. Oregano, with its aromatic properties and disease-fighting capabilities, can benefit from and contribute to the well-being of various companion plants in the garden.


Basil and oregano are natural companions in both the kitchen and the garden. Basil’s aromatic oils enhance the flavor of oregano, creating a dynamic duo. Additionally, basil helps repel certain pests that can affect oregano, such as aphids and whiteflies.


Oregano and tomatoes share a symbiotic relationship. Oregano helps protect tomatoes from pests like aphids and tomato hornworms, as well as offer the soil around tomatoes some protection. In return, tomatoes provide a bit of shade for oregano, which can be beneficial in hot climates.


companion planting with oregano

Rosemary and oregano make excellent companions in the garden. Both herbs have pest-repelling properties, and rosemary’s vertical growth complements oregano’s spreading habit. Together, they can create a barrier against common garden pests.


Oregano helps protect beans from pests like aphids and bean beetles. Its pest-repelling qualities create a protective zone around bean plants, contributing to healthier bean crops.

Cabbage Family (Broccoli, Cauliflower, Kale)

Oregano acts as a natural deterrent for cabbage moths and cabbage loopers, common pests of the cabbage family. By planting oregano near cabbage family crops, you can reduce the risk of pest infestations.


Marigolds are known for their ability to repel nematodes and certain insects harmful to plants. Planting marigolds near oregano can provide additional protection against soil-borne pests, creating a healthier growing environment.


Lavender and oregano share similar growing conditions and can complement each other aesthetically. Both plants have aromatic qualities that can help deter pests. Additionally, lavender attracts beneficial insects like pollinators, contributing to the overall health of the garden.

Onions and Garlic

Onions and garlic are known for their pest-repelling properties. They can help deter pests that might otherwise affect oregano. Additionally, the strong scents of onions and garlic can confuse and deter pests in the garden.

It’s important to note that while these companion plants can provide benefits to oregano, the success of companion planting also depends on factors such as soil conditions, climate, and specific plant varieties. Experimenting with different combinations and observing how plants interact in your specific garden environment will help you determine the most effective companions for oregano.

medicinal benefits of oregano

What Not To Plant With Oregano?

While oregano is a versatile and beneficial herb in the garden, there are certain plants that may not make ideal neighbors. Understanding which plants to avoid planting near oregano can help you optimize the health and growth of both your oregano and surrounding crops.


Both oregano and mint are vigorous growers that can spread rapidly. When planted too close together, they may compete for space and resources, leading to overcrowding and reduced overall growth. It’s recommended to keep these herbs in separate areas of the garden.


Oregano and sage have similar growth habits, and planting them too close can result in overcrowding. Both herbs may struggle for space and sunlight, negatively impacting their individual growth. To ensure optimal development, it’s best to give sage and oregano their own designated spaces.


Parsley and oregano may compete for water and nutrients, as they have similar growing requirements. Planting them too close together could lead to stunted growth and potential nutrient deficiencies. To avoid this, provide ample space between oregano and parsley.


Rue and oregano may compete for nutrients in the soil, potentially inhibiting the growth of both plants. Rue is known for its allelopathic effects, which can suppress the growth of neighboring plants. It’s advisable to plant rue and oregano in separate areas.


Thyme and oregano are both members of the mint family (Lamiaceae) and may have similar growth habits. Planting them too close together can lead to competition for resources, affecting their overall health. Providing sufficient space between these herbs is crucial.

oregano companion planting

In the grand tapestry of gardening, oregano emerges not just as an herb but as a green maestro orchestrating a symphony of flavors, aromas, and pest-repelling prowess. So, let your garden be the stage, and let oregano lead the way. Embrace the intricate dance of companion planting, and watch your garden bloom into a harmonious masterpiece, guided by the aromatic charm of oregano. Happy gardening!

Hey Beautiful! I’m Tara, garden enthusiasts, keeper of chickens, herbal homesteader and stay at home mom of 3 tiny humans and a sourdough starter named Ma. I love teaching others how to live a self-sufficient and sustainable life through homesteading, scratch cooking, and remembering to live barefoot, wild and free!

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