Companion planting is an age-old gardening technique where certain plants are grown together to improve growth, enhance flavor, deter pests, and maximize space. When it comes to potted herbs, choosing the right combinations can make a significant difference in their health and productivity. Some herbs thrive when planted alongside others, while some combinations should be avoided to prevent competition or growth issues.
In this guide, you’ll learn the best companion planting combinations for potted herbs, which herbs should not be planted together, and how to create a thriving herb garden in containers.
What Is Companion Planting?
Companion planting is the practice of growing plants together for mutual benefits. Some plants help each other by:
- Repelling pests – Certain herbs naturally keep insects away from their neighbors.
- Enhancing flavor – Some combinations improve the taste of nearby herbs.
- Maximizing space – Pairing herbs with different growth habits allows for better use of container space.
- Improving soil health – Some plants provide essential nutrients to others.
When done correctly, companion planting can create a balanced, low-maintenance potted herb garden.
Best Companion Planting Combinations for Potted Herbs
Not all herbs grow well together, but the following combinations are proven to be successful.
1. Basil and Oregano
Why They Work Well Together:
- Both herbs thrive in warm, sunny conditions.
- Oregano helps repel pests like aphids that can harm basil.
- Basil’s fragrant leaves enhance the flavor of nearby oregano.
Best Container Setup:
- Use a medium-sized pot (12-16 inches wide) with well-draining soil.
- Place in full sun with regular watering.
2. Rosemary and Thyme
Why They Work Well Together:
- Both are Mediterranean herbs that prefer dry, well-draining soil.
- Rosemary’s strong scent can deter insects that may attack thyme.
- They have similar watering needs, reducing the risk of overwatering.
Best Container Setup:
- Choose a clay or terracotta pot to allow moisture to evaporate.
- Avoid overwatering—let the soil dry out between watering.
3. Mint and Chives
Why They Work Well Together:
- Both grow well in moist soil and can tolerate partial shade.
- Mint’s strong aroma helps repel pests that might attack chives.
- Chives attract pollinators that benefit mint’s growth.
Best Container Setup:
- Use a deep pot (at least 10 inches) to control mint’s invasive roots.
- Regularly prune both plants to prevent overcrowding.
4. Cilantro and Dill
Why They Work Well Together:
- Both prefer cooler temperatures and moist soil.
- Dill helps attract beneficial insects that protect cilantro.
- Their similar growing conditions make them easy to maintain together.
Best Container Setup:
- Choose a wide container to accommodate their feathery foliage.
- Keep the pot in partial sun if temperatures are very hot.
5. Sage and Oregano
Why They Work Well Together:
- Both prefer well-draining soil and full sun.
- Sage’s strong scent helps repel harmful insects.
- Oregano acts as a ground cover, keeping moisture in the soil.
Best Container Setup:
- Use a medium-sized pot with proper drainage.
- Water sparingly, as both herbs prefer slightly dry conditions.
6. Parsley and Basil
Why They Work Well Together:
- Both like moist, rich soil and partial to full sun.
- Parsley acts as a natural pest deterrent for basil.
- Basil benefits from parsley’s ability to attract pollinators.
Best Container Setup:
- Use a plastic or ceramic pot to help retain moisture.
- Water regularly to keep the soil damp but not soggy.
Herbs That Should Not Be Planted Together
While some herbs thrive together, others compete for nutrients or have different care needs.
1. Rosemary and Basil
- Why? Rosemary likes dry soil, while basil needs more moisture.
- Alternative: Grow them in separate pots with different watering schedules.
2. Mint and Other Herbs
- Why? Mint is aggressive and will take over the pot, choking out other herbs.
- Alternative: Always plant mint in its own container.
3. Dill and Lavender
- Why? Dill prefers moist soil, while lavender thrives in dry conditions.
- Alternative: Grow dill with cilantro and lavender with rosemary.
4. Fennel and Any Other Herb
- Why? Fennel releases chemicals that can stunt the growth of neighboring plants.
- Alternative: Always plant fennel in a separate pot.
Tips for Creating a Thriving Potted Herb Garden
1. Choose the Right Containers
- Use larger pots for multiple herbs to prevent overcrowding.
- Ensure all pots have drainage holes to avoid root rot.
2. Group Herbs with Similar Watering Needs
- Mediterranean herbs (rosemary, thyme, sage) like dry soil.
- Leafy herbs (basil, parsley, cilantro) need consistent moisture.
3. Provide Adequate Sunlight
- Most herbs need 6+ hours of direct sunlight per day.
- If growing indoors, use LED grow lights for best results.
4. Water Properly
- Check the soil before watering—stick a finger 1 inch into the soil.
- Water herbs at the base rather than over the leaves to prevent mold.
5. Regular Pruning and Harvesting
- Trim herbs often to encourage bushy growth.
- Remove flowers to keep herbs producing flavorful leaves.
6. Rotate Pots Occasionally
- If growing outdoors, rotate pots every few weeks to ensure even sunlight exposure.
- If growing indoors, turn pots every few days to prevent herbs from leaning toward the light.
Conclusion: The Perfect Herb Pairings for Healthy Growth
Companion planting is a great way to maximize space, improve herb health, and deter pests in your potted herb garden. By pairing herbs with similar growing needs and beneficial properties, you can create a self-sustaining ecosystem where each plant supports the other. Whether you’re growing herbs on a balcony, windowsill, or backyard, these best companion planting combinations will help you enjoy a lush and productive herb garden.