Basil is more than a delicious culinary herb. It's also a beautiful garden plant that can grow alongside vegetables, flowers, and other herbs. Choosing the right companion plants for basil can help you make better use of garden space, attract beneficial insects, and create an attractive, productive planting.
Tomatoes, peppers, parsley, chives, and marigolds are among the most practical plants to grow near basil. They can share sunny garden spaces and complement basil's growth, provided each plant receives enough water, light, and room for its roots.
But not every companion planting claim is supported by research. Below, we'll explore the best basil companion plants, which combinations work well in containers, what to avoid planting too close, and how to create a thriving herb and vegetable garden.
Best Basil Companion Plants at a Glance
Best vegetables: Tomatoes, peppers, and eggplants
Best herbs: Parsley, chives, and cilantro during suitable cool weather
Best flowers: Marigolds, sweet alyssum, calendula, and zinnias
Best container companions: Compact tomatoes, peppers, parsley, and small flowering annuals
Good perennial companions: Chives and strawberries, with suitable spacing
Grow separately when possible: Rosemary, sage, lavender, and other plants that prefer drier soil
Best Basil Companion Plants: Quick Comparison
These plants can share garden space with basil, although the benefits vary. Some are useful because they have similar growing needs, while others add flowers that support beneficial insects.
| Companion | Why It Works | Important Tip |
|---|---|---|
| Tomatoes | Similar warmth and moisture needs; some evidence of reduced thrips | Prevent tomato plants from shading basil heavily |
| Peppers | Compatible sunny, warm growing conditions | Provide sufficient space around both plants |
| Parsley | Convenient kitchen herb combination | Parsley may appreciate some afternoon shade |
| Chives | Compact perennial herb with attractive flowers | Leave room for the clump to spread |
| Marigolds | Color and insect diversity; some pest-related research | Don't expect complete pest prevention |
| Sweet alyssum | Flowers offer nectar to small beneficial insects | Keep enough space for airflow |
| Strawberries | Edible garden combination with overlapping needs | Avoid crowding strawberry crowns |
Does Companion Planting With Basil Actually Work?
Companion planting means growing different plants near one another to make good use of garden space or potentially provide benefits such as habitat for beneficial insects.
Some companion planting combinations have been studied, but many claims about particular plants automatically improving flavor, preventing disease, or repelling pests are based more on gardening tradition than consistent scientific evidence.
University of Minnesota Extension reports that some studies have found reduced thrips on tomatoes grown with basil or marigolds. However, results depend on the pest, crop, planting arrangement, and growing conditions.
What Companion Plants Can Realistically Do
- Make efficient use of growing space
- Add flowers that support pollinators and beneficial insects
- Increase plant diversity throughout a garden
- Provide complementary crops for harvesting
- Sometimes influence specific pest populations under particular conditions
The most reliable strategy is to choose plants with compatible sunlight, moisture, drainage, and spacing requirements rather than expecting one plant to automatically protect another.
Companion planting myth: Growing basil next to tomatoes doesn't reliably make tomatoes taste sweeter, and planting an aromatic herb nearby does not guarantee that pests will disappear. Good plant care and integrated pest management are still important.
Best Vegetables to Plant With Basil
Most warm-season vegetables can be grown near basil if there's enough room, sunlight, and moisture for each plant.
1. Tomatoes
Tomatoes are one of the best-known basil companion plants. Both enjoy sunny locations, warm temperatures, fertile soil, and consistent watering.
Some research suggests that interplanting basil with tomatoes may influence specific insect pests, including thrips. However, the benefit isn't guaranteed in every home garden.
Position basil near the outer edge of tomato plants rather than directly beneath dense tomato foliage. Tomato plants grow large and can shade basil if spacing isn't planned carefully.
Planting tip: For a raised bed, place basil roughly 12–18 inches from nearby tomato stems where space permits, and provide appropriate spacing for the mature tomato variety. Keep both plants accessible for pruning and harvesting.
2. Peppers
Sweet peppers, hot peppers, and ornamental peppers can grow well alongside basil. Both plants prefer warm weather and plenty of light.
This combination is especially useful in raised beds and large containers. Keep the plants appropriately spaced so air can circulate around their leaves.
3. Eggplant
Eggplant is another heat-loving vegetable that shares many of basil's growing preferences. Both can thrive in sunny gardens with fertile, well-drained soil.
Eggplants may become large and spreading, so keep enough space between plants to prevent excessive shading and competition.
4. Lettuce and Other Salad Greens
Lettuce, radishes, and other compact salad crops can be grown in the same general garden area as basil, particularly during cooler parts of the growing season.
However, cool-season greens may struggle when basil is growing most vigorously in summer heat. Consider succession planting or using separate areas for spring and fall crops.
Best Herbs and Perennials to Grow With Basil
Many kitchen herbs make attractive companions for basil. The best combinations are those with similar moisture and light requirements.
Parsley
Parsley works well in mixed kitchen gardens because it benefits from fertile, well-drained soil and regular watering.
In particularly hot conditions, parsley may benefit from some afternoon shade while basil continues growing in full sun. Adjust placement based on the local climate.
Chives
Chives are compact perennial herbs that provide edible leaves and attractive flowers. Their upright growth makes them a useful complement to bushy basil plants.
Plant chives with enough room to form a healthy clump and avoid crowding basil's growing stems.
Oregano
Oregano can share a sunny herb garden with basil, but the two plants generally prefer different watering conditions. Established oregano is often more drought tolerant.
Plant oregano in a separate section of the garden or its own container if your basil requires frequent irrigation.
Strawberries
Strawberries can be attractive edible companions in larger raised beds. They appreciate sunny locations and consistent moisture, although their spreading growth requires attention.
Keep basil from shading strawberry crowns, and avoid planting so densely that airflow is restricted.
Large flowering basil varieties, such as African blue basil, can also be used ornamentally in mixed garden beds. Their flowers may attract bees and other pollinating insects when allowed to bloom.
Best Flowers to Plant With Basil
Flowering annuals make excellent partners for basil in edible landscapes and raised beds. They add color while creating additional sources of nectar and pollen for beneficial insects.
Marigolds
Marigolds provide cheerful yellow, orange, and red flowers that complement basil's foliage. Some studies suggest certain marigold and basil plantings may influence specific pests in vegetable gardens, but they aren't a substitute for monitoring and pest management.
Sweet Alyssum
Sweet alyssum produces clusters of tiny flowers that can provide nectar for hoverflies and other beneficial insects. Its low-growing habit makes it an attractive garden edging plant, although it should not crowd basil stems.
Calendula
Calendula adds bright orange or yellow flowers to herb gardens. It performs best during cooler weather in many climates, making it useful for spring or fall plantings where the seasons overlap with basil.
Zinnias and Cosmos
These warm-season annuals add colorful flowers and support various visiting insects. Grow them near basil where they can receive sufficient sunlight, but keep taller varieties from shading the herb.
Nasturtiums
Nasturtiums offer colorful edible flowers and trailing foliage. They can grow near basil in well-drained garden beds, but their sprawling stems should be managed so they don't cover smaller plants.
Best Basil Companion Plants for Containers
Basil is a wonderful plant for patio containers, window boxes, and mixed edible planters. Compact varieties are particularly useful because they provide attractive foliage without taking up as much space.
When combining basil with other plants, choose a container large enough for all mature root systems and make sure it has adequate drainage.
A large planter can include compact basil, a small pepper plant, and a few seasonal flowers. For larger tomatoes or vigorous herbs, separate pots may make watering and spacing easier.
Example: A Mixed Edible Basil Container
- Focal plant: A compact pepper or appropriately sized tomato variety
- Herb: Bushy basil for frequent harvesting
- Flowers: A small marigold or sweet alyssum
- Growing conditions: Full sun, consistent moisture, good drainage, and sufficient root space
Monitor container moisture carefully. Multiple plants compete for the available water, and large mixed planters may need frequent watering during hot summer weather.
Fertilizing Basil in Mixed Containers
Basil growing in containers may need occasional fertilizer because nutrients gradually wash out of potting mix.
A diluted, balanced liquid fertilizer applied approximately every three to four weeks during active outdoor growth may be suitable when needed. Follow the product's instructions and adjust for the other plants in the container.
Container tip: Don't place several full-size plants into a small pot simply because they look good together at planting time. Plan for mature size, root competition, and watering needs.
Plants Not to Grow Too Close to Basil
Many gardening guides include lists of plants that should never grow near basil. In reality, few combinations are automatically harmful, and the strongest reasons to separate plants are usually different water requirements, crowding, or incompatible growing conditions.
These are the situations most worth avoiding.
Sage, Rosemary, and Lavender
These Mediterranean herbs generally prefer soil that becomes drier between waterings than basil does. They can grow in the same overall garden, but separate pots or watering zones make it easier to meet their needs.
Fennel
Mature fennel can become large and may compete with nearby herbs for sunlight and root space. Give fennel its own growing area, especially when growing tall herb varieties. Claims that fennel always suppresses basil growth shouldn't be treated as universal facts.
Rue
Rue is a woody perennial herb that often prefers leaner, drier conditions than basil. It can also cause skin irritation in some people. Growing it separately is a sensible choice, particularly in herb gardens frequently visited for harvesting.
Very Large or Aggressive Plants
Large plants can shade basil, while vigorous vines or spreading groundcovers may compete for growing space. Position basil where it can receive plenty of sunlight and remain accessible for frequent harvesting.
Important correction: There isn't convincing evidence that simply planting sage, fennel, or rue next to basil automatically makes basil taste bitter. Basil flavor is more closely influenced by variety, plant maturity, growing conditions, and harvesting practices.
How to Arrange Basil Companion Plants in Your Garden
Thoughtful spacing is one of the easiest ways to create a successful mixed herb garden. Basil typically grows best when it receives full sun, regular moisture, and enough airflow around its leaves.
Example 1: Basil and Tomato Raised Bed
- Place tomato plants where they won't shade the entire bed.
- Plant basil toward the sunny side or edge of the bed.
- Add compact marigolds or sweet alyssum near the outer border.
- Leave enough space for tomato pruning and basil harvesting.
- Use mulch and consistent irrigation to help manage soil moisture.
Example 2: Mixed Culinary Herb Garden
Group basil with parsley and chives in a sunny, regularly watered section of the garden.
Place rosemary, sage, thyme, and oregano in a separate area with excellent drainage and somewhat drier soil. This makes routine watering easier and reduces the risk of keeping drought-tolerant herbs too wet.
Example 3: Pollinator-Friendly Edible Border
Combine ornamental basil varieties with zinnias, calendula, sweet alyssum, and other suitable flowering plants.
The flowers add color and insect habitat, while basil provides aromatic foliage for both ornamental interest and culinary use. If you allow some basil plants to flower, they can offer an additional nectar resource for visiting insects.
Basil care reminder: Most sweet basil varieties need at least 6–8 hours of sunlight, consistent soil moisture, and regular pinching for bushy growth. Learn more in our Basil Plant Care Guide.
Frequently Asked Questions About Basil Companion Plants
What grows best next to basil?
Tomatoes, peppers, parsley, chives, and marigolds are practical choices. They can share sunny garden space with basil when given suitable moisture, soil, and spacing.
Is basil a good companion plant for tomatoes?
Yes. Basil and tomatoes share similar growing requirements. Some studies suggest certain basil-and-tomato plantings may influence thrips populations, although pest reduction isn't guaranteed in every garden.
Can you plant basil and peppers together?
Yes. Peppers and basil both prefer warm conditions, sunny locations, and well-drained soil. Choose spacing appropriate for the pepper variety and allow basil adequate sunlight and airflow.
What herbs should you avoid planting with basil?
Rosemary, sage, and lavender often prefer drier growing conditions than basil, making separate watering zones helpful. Fennel can become large and compete for space. These are practical growing-condition concerns rather than evidence that the plants automatically harm basil.
Does basil repel mosquitoes or garden pests?
Basil produces aromatic compounds, and some research has examined its effects on particular insects. However, simply growing basil nearby should not be considered dependable mosquito control or complete protection against garden pests.
Can basil and parsley grow in the same pot?
Yes, if the container is large enough and has drainage holes. Both plants benefit from fertile soil and regular watering. Provide enough light for basil, and account for parsley's preference for cooler conditions.
Are marigolds good companions for basil?
Yes. Marigolds are attractive warm-season flowers that can grow near basil. They contribute seasonal color and floral resources for insects, although they won't eliminate every pest problem.
Can basil grow with rosemary or thyme?
Basil can grow in the same garden as rosemary or thyme, but these Mediterranean herbs generally prefer drier soil. Separate pots or distinct watering zones make it easier to keep all the plants healthy.
Choosing the Best Plants to Grow With Basil
Basil grows well with a wide range of vegetables, herbs, and annual flowers. Tomatoes, peppers, parsley, chives, and marigolds are especially useful choices for productive home gardens.
The most successful companion plantings start with compatible growing conditions. Give every plant enough light, water, nutrients, and space rather than relying on unproven claims that certain combinations automatically improve flavor or eliminate pests.
Whether you're growing basil in a raised bed, patio container, or mixed herb garden, thoughtful plant selection can help you create a beautiful and productive space throughout the growing season.
Gardening References
- University of Minnesota Extension. Companion Planting in Home Gardens. Research-based discussion of companion planting and insect management.
- University of Delaware Cooperative Extension. The New Companion Planting: Adding Diversity to the Garden. Information about beneficial insects and diversified planting.
- University of Maryland Extension. Vegetable Succession and Companion Planting. Interplanting techniques and plant compatibility.
- University of Minnesota Extension. Growing Basil in Home Gardens. Basil spacing, watering, fertilizing, and varieties.
- University of Maryland Extension. Growing Basil in a Home Garden. Basil growing conditions and disease prevention.