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What to plant with Thai basil comes down to finding companions that share its love for warmth, sun, and consistent moisture.
Pairing the right plants with Thai basil isn’t just about saving garden space, it’s about boosting flavor, deterring pests, and making your whole bed healthier.
When you’re deciding what to plant with Thai basil, think about plants that won’t tower over it and steal all the light.
It also helps to pick companions that have similar watering needs so you don’t end up drowning one plant to save another.
In this post, we’ll explore the top companions for what to plant with Thai basil, why they work so well together, and a few plants you should definitely keep far away.
Let’s dig in and build the perfect garden team for your Thai basil.
What To Plant With Thai Basil For The Best Results
The best answer for what to plant with Thai basil is a mix of vegetables, herbs, and flowers that support each other naturally.
There are several specific plants that thrive side-by-side with Thai basil and we’ll break down the best of them right here.
1. Tomatoes Are The Classic Companion
It’s almost a rule in gardening that you plant Thai basil with tomatoes because they’re such perfect partners.
Tomatoes and Thai basil both need full sun and well-draining soil, so they’re easy to care for in the same bed.
Thai basil also helps repel tomato hornworms, which are a common pest that can destroy your tomato plants.
In return, the sprawling tomato plants provide a bit of afternoon shade for the Thai basil’s roots, keeping them cooler.
Many gardeners also say that growing Thai basil near tomatoes actually improves the flavor of the tomatoes themselves.
So if you’re wondering what to plant with Thai basil, tomatoes should be your very first choice.
2. Peppers Love The Same Conditions
Peppers are another excellent answer to the question of what to plant with Thai basil.
Both peppers and Thai basil are heat lovers that thrive in similar temperatures and sunlight.
They also have very similar watering needs, so you won’t have to worry about over or under watering one of them.
The strong scent of Thai basil helps mask the smell of pepper plants, which can confuse pests like aphids and spider mites.
You can plant peppers right next to Thai basil and they’ll both grow strong without competing for root space.
This pairing is a no-brainer for any warm-season garden.
3. Asparagus Benefits From The Pest Repelling Power
When you look at what to plant with Thai basil, asparagus might not be the first thing that comes to mind.
But asparagus absolutely benefits from having Thai basil as a neighbor because it helps repel asparagus beetles.
These beetles can wreak havoc on asparagus spears and foliage, but Thai basil’s aromatic oils keep them away.
Thai basil also acts as a living mulch around the base of asparagus plants, helping to retain soil moisture.
The asparagus grows tall and thin, while Thai basil stays bushier and lower to the ground.
This means they don’t compete for the same vertical space in your garden bed.
4. Marigolds Add Color And Pest Control
Adding marigolds is one of the smartest moves you can make when figuring out what to plant with Thai basil.
Marigolds have a strong, distinctive scent that repels nematodes, whiteflies, and other soil-borne pests.
These flowers also attract beneficial insects like ladybugs and lacewings that feed on aphids.
The vibrant orange and yellow blooms add a pop of color alongside the green leaves of Thai basil.
Marigolds are also incredibly easy to grow from seed and will self-sow for next year.
So for beauty and protection, marigolds are a fantastic companion for Thai basil.
5. Lettuce And Leafy Greens Are Quick Friends
If you’re short on space, you can plant Thai basil with fast-growing leafy greens like lettuce and spinach.
These greens have shallow roots that don’t compete with the deeper root system of Thai basil.
The Thai basil provides a bit of shade for the lettuce, which helps slow down bolting in the heat.
You can harvest the lettuce early before the Thai basil really takes off and spreads out.
This is one of the best ways to maximize yield in a small garden bed.
Just remember to plant the lettuce on the shadier side of the Thai basil to keep it cool.
6. Chives And Other Alliums Work Great
Chives, garlic, and onions are all fantastic answers for what to plant with Thai basil.
These alliums have strong scents that confuse and repel many common garden pests.
They also don’t take up much space and can be tucked in and around the base of Thai basil plants.
Chives in particular are known to improve the flavor and growth of nearby basil plants.
Plus, you can harvest both chives and Thai basil fresh all season long for your cooking.
It’s a match made in heaven for both your garden and your kitchen.
7. Borage Is A Pollinator Magnet
Borage is a beautiful herb with blue, star-shaped flowers that are irresistible to bees and other pollinators.
What to plant with Thai basil often includes borage because it brings in the pollinators that also help with Thai basil’s own flowering process.
Borage also adds trace minerals to the soil as it decomposes, benefiting the Thai basil.
It’s a hardy plant that can tolerate dry conditions once established, so it won’t stress over watering.
The flowers of borage are also edible and make a lovely garnish on top of any Thai dish.
Using borage as a companion is a great way to boost the entire health of your garden ecosystem.
8. Oregano Shares The Herb Garden Space
Oregano is a low-growing, hardy herb that makes a great ground cover around Thai basil.
Both oregano and Thai basil appreciate well-drained soil and plenty of sunlight.
Oregano’s trailing habit helps suppress weeds and keeps the soil moist for the Thai basil.
The two herbs also have complementary flavors and can be used together in many Mediterranean and Asian dishes.
You can plant oregano at the edges of your Thai basil container or bed for a full and productive look.
It’s a simple and rewarding answer to what to plant with Thai basil.
What NOT To Plant With Thai Basil
Just as important as knowing what to plant with Thai basil is knowing which plants to avoid.
Some plants can actually hurt your Thai basil by competing for nutrients, attracting pests, or stunting growth.
Below are a few plants you should keep away from your Thai basil patch.
1. Keep Rue Far Away
Rue is a strongly aromatic herb that can actually stunt the growth of Thai basil.
It’s known to inhibit the germination and growth of many nearby plants, including basil.
The two also have completely different watering needs, which can lead to root rot for one of them.
So even if you have space, it’s best to keep rue in a completely different part of your garden.
Rue is one of the few herbs that doesn’t play nicely with its herb cousins.
2. Avoid Fennel At All Costs
Fennel is notorious for being allelopathic, which means it releases chemicals that inhibit the growth of nearby plants.
It’s particularly bad for Thai basil and other herbs because it can kill them or severely stunt their growth.
Fennel also attracts pests like aphids and whiteflies which could easily move onto your Thai basil.
It’s best to plant fennel on its own in a separate container or a distant corner of the garden.
This is one major mistake to avoid when you’re planning what to plant with Thai basil.
3. Skip The Cucumbers
Cucumbers might seem like a good companion, but they can actually cause problems for Thai basil.
Cucumbers are heavy feeders and will compete with Thai basil for essential nutrients in the soil.
They also like to sprawl and vine, which can quickly cover and shade out your shorter Thai basil plants.
This overcrowding can lead to poor airflow and increase the risk of fungal diseases.
So while you can technically grow both in the same garden, it’s better to give them their own separate spaces.
So, What To Plant With Thai Basil?
What to plant with Thai basil is best answered by tomatoes, peppers, asparagus, and marigolds.
These companions share similar growing conditions and provide mutual benefits like pest control and flavor enhancement.
Leafy greens, chives, and borage also offer great benefits and maximize your garden’s productivity.
Just remember to steer clear of rue, fennel, and cucumbers to keep your Thai basil thriving.
We hope this guide helps you plan a successful companion planting strategy for your Thai basil.
Happy gardening and enjoy the incredible flavors your Thai basil will bring to your kitchen!