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Iris companion plants and what you should avoid
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siberian iris

Companion planting for iris is an experience-based observation developed over centuries. People have noticed that planting certain plants side by side has a positive effect on each other, increasing the quality and quantity of the harvest. Companion planting is not set in stone and it is the least you can do for your plants. You can get the right care from the individual plant article. You can see the companion and the enemy plants of iris below.

Companion plants for iris Enemy plants of iris
Lupine Strawberry

Why does companion planting work?

Companion planting works due to several interconnected factors:

  1. Pest Control: Certain plants emit natural chemicals or scents that repel pests, effectively acting as natural pest deterrents for nearby plants. This reduces the need for chemical pesticides and fosters a more balanced ecosystem.

  2. Attracting Beneficial Insects: Some companion plants attract beneficial insects like ladybugs, hoverflies, and predatory wasps, which feed on common garden pests. This creates a natural form of pest control and helps maintain ecological balance.

  3. Soil Improvement: Different plants have varying root structures and nutrient requirements. Companion planting can enhance soil health by reducing soil erosion, suppressing weeds, and improving nutrient uptake. For example, leguminous plants fix nitrogen in the soil, benefiting neighboring plants that require nitrogen for growth.

  4. Competition Reduction: Companion planting can help reduce competition for resources such as water, sunlight, and nutrients by utilizing plants with complementary growth patterns and root structures. This allows for more efficient resource utilization and healthier plant growth.

  5. Biodiversity and Resilience: Planting diverse species together increases biodiversity in the garden, which can enhance ecosystem resilience. A diverse ecosystem is better equipped to withstand pests, diseases, and environmental stresses compared to monocultures.

  6. Maximizing Space: Companion planting allows gardeners to make the most of limited space by intercropping plants with different growth habits and maturity rates. This maximizes yield per square foot and promotes efficient land use.

Overall, companion planting capitalizes on the natural synergies between plant species, creating a thriving and sustainable garden ecosystem.

What are the companion plants of iris?

The following plants have positive effects on the growth of your iris. These plants can repel pests that damage your plants. These plants provide increased nutrition to the soil that your plants can use. Therefore, we recommend planting these plants next to your iris.


Lupine plants are thriving in various soil types but preferring well-drained, slightly acidic to neutral soil. They flourish in full sunlight, showcasing vibrant blooms and adding a pop of color to gardens. Beyond their visual appeal, Lupine plants enrich soil health, attract pollinators, and contribute to the biodiversity of natural landscapes.


Peonies grow in well-drained, fertile soil with a pH range between 6.5 and 7.5. Full sunlight and proper air circulation nurture their luxurious flowers and lush foliage. Peonies provide invaluable benefits to neighboring plants by attracting pollinators, enhancing garden aesthetics, and promoting a sense of serenity in the landscape.


Roses, known for their majestic blooms and garden beauty, grow in various soil conditions. Flourishing in loamy soil with a pH range between 6.0 and 7.0. Full sunlight and consistent moisture nurture their luxurious flowers and lush foliage. Roses provide invaluable benefits to neighboring plants by attracting pollinators, enhancing garden aesthetics, and promoting a sense of tranquility in the landscape.


Tulips thrive in well-draining soil (pH 6.0 - 7.0), preferring it to be on the sandy side. As for care, they're pretty low-maintenance once planted – just give them some sun, well-drained soil, and they'll bloom beautifully. They don't like too much shade, so steer clear of planting them under trees.

What should you not plant next to iris?

Planting these plants next to iris have huge negative effects on the development of your plant. Growing enemy plants can appeal detrimental insects, change the taste of the grown plant and even consuming all of the nutrients and water from your iris. Because of these negative effects, we don’t recomment growing the plants below next to your iris.


Strawberries grow in loamy soil with a pH range between 5.5 and 6.5. Full sunlight and consistent moisture nurture their delicate fruits and lush foliage. Strawberries provide invaluable benefits to neighboring plants by attracting pollinators, suppressing weed growth with their dense foliage.

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