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10 Essential Companion Plants for Geraniums: Boost Growth and Biodiversity!

Dr Ahsanur Rahman, PHD

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Companion plants for geraniums include marigolds, petunias, lavender, and rosemary. These plants complement and support the growth of geraniums, creating a beautiful and thriving garden ecosystem.

By strategically selecting companion plants, gardeners can promote pest control, improve soil fertility, and enhance the overall health and vitality of geraniums. With their vibrant colors and delightful fragrances, these companion plants also add visual appeal and sensory pleasure to any garden.

Whether you are a novice gardener or a seasoned horticulturist, incorporating these companion plants with geraniums can elevate your garden’s beauty and yield. Discover the perfect companions for your geraniums and create a harmonious and thriving garden space.

10 Essential Companion Plants for Geraniums: Boost Growth and Biodiversity!
10 Essential Companion Plants for Geraniums: Boost Growth and Biodiversity! 4


Benefits Of Companion Planting For Geraniums

Enhancing Soil Fertility And Nutrient Uptake

Companion planting can greatly benefit geraniums by enhancing soil fertility and nutrient uptake. By selecting specific plants to grow alongside geraniums, gardeners can create a synergistic relationship that improves the overall health of the soil and supports the growth of geraniums.

Here are the key points to consider:

  • Nitrogen fixation: Certain companion plants, such as legumes like clover or peas, have the ability to fix nitrogen into the soil. This is beneficial for geraniums because nitrogen is a vital nutrient for their growth and development.
  • Organic matter decomposition: Planting companion plants that have high levels of organic matter, like marigolds or sunflowers, can help to improve the soil’s structure and increase its nutrient content. As these plants decompose, they release valuable nutrients that can be utilized by the geraniums.
  • Nutrient cycling: Some companion plants, such as comfrey or borage, have deep root systems that can access and bring up nutrients from deeper soil layers. These nutrients can then be made available for the geraniums through nutrient cycling.
  • Soil moisture regulation: Certain companion plants, like thyme or oregano, have shallow root systems that can help regulate soil moisture levels. This can be beneficial for geraniums, especially during periods of drought or excessive rainfall.

By incorporating companion plants that enhance soil fertility and nutrient uptake, gardeners can create a supportive environment that promotes the healthy growth of geraniums.

Natural Pest Control And Disease Prevention

Companion planting not only improves soil fertility but also provides natural pest control and disease prevention for geraniums. By strategically selecting companion plants, gardeners can create a balanced ecosystem that discourages pests and reduces the risk of disease. Here are the key points to consider:

  • Pest deterrents: Certain companion plants, such as marigolds or petunias, emit natural compounds or fragrances that repel pests like aphids or whiteflies. By interplanting these companion plants with geraniums, gardeners can help deter pest infestations and protect the geraniums from damage.
  • Attracting beneficial insects: Planting companion plants like lavender or yarrow can attract beneficial insects such as ladybugs or lacewings. These insects feed on common garden pests and can help control populations naturally, reducing the need for chemical interventions.
  • Disease resistance: Some companion plants, like garlic or chives, have natural fungicidal or antibacterial properties that can help prevent diseases in nearby plants, including geraniums. These plants can act as a natural barrier against common diseases that affect geraniums, such as fungal infections or bacterial blights.

By incorporating companion plants that provide natural pest control and disease prevention, gardeners can minimize the use of chemical pesticides and create a healthier growing environment for geraniums.

Encouraging Pollination And Attracting Beneficial Insects

Companion planting can play a crucial role in encouraging pollination and attracting beneficial insects to the garden, which is highly beneficial for geraniums. By selecting companion plants that attract pollinators and beneficial insects, gardeners can ensure proper pollination and improve overall plant health.

Here are the key points to consider:

  • Pollinator attractors: Certain companion plants, such as salvias or bee balm, have brightly colored flowers that attract bees, butterflies, and other pollinators. These pollinators play a vital role in transferring pollen between geranium flowers, leading to better fruit set and seed production.
  • Beneficial insect habitats: Planting companion plants like dill or fennel can provide habitats for beneficial insects such as parasitic wasps or hoverflies. These insects prey on common garden pests and help maintain a natural balance in the garden ecosystem.
  • Nectar sources: Companion plants like verbena or catmint produce abundant nectar, which serves as a food source for pollinators and beneficial insects. By planting these nectar-rich companion plants alongside geraniums, gardeners can attract a diverse range of beneficial insects to the garden.

By embracing companion planting and selecting plants that encourage pollination and attract beneficial insects, gardeners can create a thriving ecosystem that supports the health and productivity of their geraniums.

Selecting The Right Companion Plants For Geraniums

Companion planting is an effective way to maximize the beauty and growth of your geranium plants. By selecting the right plants to accompany your geraniums, you not only create stunning visual displays but also promote healthy growth. In this section, we will delve into the key considerations when choosing companion plants for geraniums, including sunlight and soil requirements, compatibility in growth habits and water needs, as well as avoiding plants that may compete or inhibit geranium growth.

Consideration Of Sunlight And Soil Requirements:

  • Geraniums thrive in full sun, so it is essential to select companion plants that share similar sunlight needs. Here are some suitable options:
  • Marigolds: These vibrant flowers also flourish in full sun and complement the vibrant colors of geraniums.
  • Lavender: Known for its soothing aroma, lavender thrives in sunny conditions and adds a touch of elegance to your geranium beds.
  • Salvia: With its vibrant spikes of flowers, salvia is a perfect contrast to the rounded blooms of geraniums.

Compatibility In Growth Habits And Water Needs:

  • When choosing companion plants for geraniums, it is crucial to consider their growth habits and water requirements. Here are some options that complement geraniums:
  • Petunias: These low-growing annuals work well in tandem with geraniums, creating a stunning floral carpet.
  • Alyssum: These delicate, fragrant flowers create a charming border for geraniums and require similar water needs.
  • Dianthus: With their attractive, fringed petals, dianthus flowers are a great addition to geranium beds, as they appreciate similar water and feeding schedules.

Avoiding Plants That May Compete Or Inhibit Geranium Growth:

  • Certain plants may compete with geraniums for nutrients or inhibit their growth. It is crucial to steer clear of such plants to ensure the optimal growth of your geraniums. Here are some plants to avoid as companion plants for geraniums:
  • Ivy: Known for its vigorous growth, ivy can quickly overwhelm and smother geraniums, depriving them of essential light and nutrients.
  • Daffodils: While daffodils may look beautiful during their blooming period, they have dense root systems that can compete with geraniums and hamper their growth.
  • Tall shrubs or trees: Due to their shade-casting nature, tall shrubs and trees can deprive geraniums of much-needed sunlight, stunting their growth and inhibiting flower production.

By carefully considering the sunlight and soil requirements, compatibility in growth habits and water needs, as well as avoiding competing plants, you can create a harmonious garden with your geraniums at the center stage. So go ahead and experiment with these companion plants, and watch your geraniums thrive in the company of their perfect companions.

10 Essential Companion Plants And Their Benefits

Companion Plants For Geraniums: 10 Essential Companion Plants And Their Benefits

Geraniums are beautiful flowering plants that can add color and vibrancy to any garden. But did you know that pairing geraniums with certain companion plants can enhance their growth and protect them from pests and diseases? In this section, we will explore 10 essential companion plants for geraniums and the benefits they provide.


  • Enhance soil fertility: Marigolds release chemicals into the soil that improve its fertility, making it more suitable for geraniums to thrive.
  • Repel nematodes: The strong scent of marigolds acts as a natural deterrent for nematodes, which can damage the roots of geraniums.


  • Attract pollinators: Lavender’s fragrant flowers are irresistible to bees, butterflies, and other pollinators, increasing the chances of geraniums being pollinated and producing more flowers.
  • Deter pests: The strong scent of lavender repels pests like aphids and mosquitoes, protecting geraniums from potential damage.


  • Repel aphids: Chives release a pungent aroma that aphids find repulsive, keeping these destructive insects away from geraniums.
  • Deter fungal diseases: Chives contain sulfur compounds that are known to inhibit the growth of fungal diseases, reducing the risk of infection in geraniums.


  • Attract predatory insects: Nasturtiums produce nectar and bright flowers that attract beneficial insects like ladybugs and hoverflies, which prey on pests that can harm geraniums.
  • Deter pests: Nasturtiums emit a strong scent that repels pests such as whiteflies and spider mites, helping to protect geraniums from infestation.


  • Repel pests: Oregano contains chemicals that repel common garden pests like aphids, thrips, and cabbage worms, reducing the chances of these pests attacking geraniums.
  • Provide ground cover: The spreading growth habit of oregano can help suppress weed growth and provide shade to the soil, keeping the roots of geraniums cool and protected.


  • Repel mosquitoes: The strong aroma of basil acts as a natural mosquito repellent, creating a more pleasant environment for both geraniums and gardeners.
  • Improve geranium flavor: When planted near geraniums, basil can improve their flavor and aroma, creating a delightful sensory experience.


  • Attract pollinators: Calendula’s bright yellow and orange flowers are known to attract bees and other pollinators, increasing the chances of geraniums setting fruit or producing seeds.
  • Deter pests: Calendula’s pungent scent repels pests like aphids, whiteflies, and nematodes, providing protection to geraniums.


  • Repel insects: Catnip emits a strong aroma that repels insects like mosquitoes, ants, and beetles, safeguarding geraniums from potential damage.
  • Deter rodents: The strong scent of catnip also acts as a deterrent for rodents like mice and rats, preventing them from causing harm to geraniums.


  • Attract beneficial insects: Dill produces delicate, umbrella-shaped flowers that attract beneficial insects like ladybugs and lacewings, which can prey on pests that may harm geraniums.
  • Deter pests: The strong scent of dill helps deter pests such as aphids, spider mites, and cabbage worms, providing protection to geraniums.


  • Improve geranium aroma: Sage has a delightful aroma that can enhance the overall fragrance of geraniums, making them even more appealing.
  • Repel pests: The strong scent of sage also acts as a natural pest repellent, deterring pests like moths, cabbage worms, and carrot flies from damaging geraniums.

These essential companion plants not only provide valuable benefits to geraniums but also add beauty and diversity to your garden. Consider pairing these plants with your geraniums to create a thriving and harmonious garden ecosystem.

Planting Techniques And Tips For Successful Companion Planting

Companion planting can be a valuable technique for maximizing the growth and health of your geraniums. By strategically selecting plants that can support and benefit each other, you can create a harmonious garden ecosystem. However, successful companion planting requires careful consideration and planning.

In this section, we will explore some essential planting techniques and tips to ensure the optimal success of your companion plants with geraniums.

Interplanting Vs. Border Planting

  • Interplanting involves mixing different types of plants within the same garden bed. This technique not only saves space but also encourages beneficial interactions between plants.
  • Border planting, on the other hand, involves creating a dedicated area around the perimeter of your garden bed to accommodate companion plants. This can help define and enhance the visual appeal of the space.

Proper Spacing To Avoid Competition

  • Adequate spacing between plants is crucial to prevent competition for essential resources like sunlight, water, and nutrients. A general guideline is to leave at least 6-12 inches of space between each plant.
  • Avoid overcrowding the area around your geraniums, as this can lead to stunted growth and increased susceptibility to diseases and pests.

Rotating Companion Plants To Prevent Pest And Disease Buildup

  • Regularly rotating your companion plants can help disrupt the life cycles of pests and diseases that may be specific to certain plant species.
  • By alternating the locations of different plants each season, you can effectively prevent the buildup of harmful organisms in the soil.

Incorporating these planting techniques and tips into your companion planting strategy will help ensure the success of your geraniums and their companion plants. Remember to provide sufficient space between plants, choose the appropriate interplanting or border planting method, and regularly rotate your companion plants to maintain a healthy and vibrant garden.

Maintenance And Care For Companion Plants And Geraniums

Companion plants can be a great addition to your geranium garden, not only enhancing the beauty of your space but also providing practical benefits. One important aspect of maintaining a successful garden is understanding the specific care requirements for both your geraniums and their companion plants.

In this section, we will explore the key maintenance and care techniques for ensuring the long-term health and vitality of your geraniums and their companions.

Watering And Fertilization Needs

  • Geraniums and their companion plants have varying water requirements, so it is essential to understand the specific needs of each plant.
  • Water your geraniums deeply, ensuring the soil is evenly moist but not waterlogged.
  • Companion plants may have differing water needs, so adjust your watering schedule accordingly.
  • Fertilize your geraniums regularly with a balanced, slow-release fertilizer to promote healthy growth.
  • Avoid over-fertilization, as this can lead to excessive foliage growth and reduced flower production.
  • Consider the nutritional needs of your companion plants and provide fertilization as required.

Pruning And Deadheading Techniques

  • Regular pruning is crucial for maintaining the shape and compactness of geraniums.
  • Trim back the stems by about one-third to encourage bushier growth and more blooming.
  • Deadheading, or removing spent flowers, helps to prolong the blooming period of your geraniums.
  • Snip off the faded flowers at the base of the stem to redirect the plant’s energy towards new growth.
  • Companion plants may also benefit from occasional pruning to maintain their shape and control their growth.

Monitoring For Pests And Diseases

  • Regular monitoring is essential to identify and address any pest or disease issues promptly.
  • Inspect your geraniums and their companion plants regularly, looking for signs of pests or diseases.
  • Common pests that may affect geraniums include aphids, spider mites, and whiteflies.
  • Companion plants may attract pests that could potentially harm geraniums, so early detection is crucial.
  • Treat any pest or disease issues promptly using organic or chemical methods appropriate for the specific problem and plant.

Remember, each plant has its unique care requirements, and understanding these needs will ensure proper maintenance of your geraniums and their companion plants. By providing adequate water, regular pruning, and vigilant pest monitoring, you can create a thriving garden filled with beautiful blooms and healthy plants.

Frequently Asked Questions For Companion Plants For Geraniums

Q: What Are Some Companion Plants For Geraniums?

A: some great companion plants for geraniums include marigolds, petunias, lavender, and rosemary. These plants not only look beautiful together but also help repel pests and attract beneficial insects to your garden.

Q: Can I Plant Geraniums With Tomatoes?

A: yes, geraniums make excellent companion plants for tomatoes. They help keep pests like hornworms and aphids away from your tomato plants. Planting geraniums alongside your tomatoes can also add a pop of color to your vegetable garden.

Q: Are There Any Plants That Should Not Be Planted Near Geraniums?

A: while geraniums generally get along well with most plants, it’s best to avoid planting them near herbs like basil, thyme, and oregano. These herbs can overshadow the geraniums and may compete for nutrients and sunlight.

Q: How Do Companion Plants Benefit Geraniums?

A: companion plants offer several benefits to geraniums. They can help repel pests, attract beneficial insects like ladybugs, improve soil fertility, and provide shade or support. Additionally, companion plants can enhance the overall aesthetics of your garden by creating beautiful color combinations.

Q: Can I Plant Geraniums With Roses?

A: yes, geraniums and roses make great companions. Geraniums help deter pests like aphids and japanese beetles from attacking your roses. Their colorful blooms also complement the elegance of roses, adding visual interest to your garden.

Q: Do Geraniums Have Any Negative Effects On Other Plants?

A: geraniums generally do not have any negative effects on other plants. However, they can become aggressive if allowed to spread unchecked, competing with neighboring plants for resources. Regular pruning and maintenance will help prevent this.


To maximize the growth and health of your geraniums, consider planting them alongside compatible companion plants. By carefully selecting these companions, you can create a harmonious garden that not only provides aesthetic appeal but also contributes to the overall well-being of your geraniums.

Lavender, for example, enhances the fragrance of your geraniums while attracting beneficial insects that help control pests. Marigolds, on the other hand, repel harmful nematodes and offer vibrant color contrasts. For a touch of elegance, try pairing your geraniums with ornamental grasses or foliage plants like coleus.

The texture and height variations they add create a visually pleasing display. Lastly, herbs like basil and thyme bring culinary benefits, making them excellent companions for your geraniums. With careful plant selection, you can create an environment that promotes growth and enhances the beauty of your geranium garden.

So go ahead, experiment with different combinations, and enjoy the wonderful world of companion plants for geraniums. Protection Status