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What to plant with tomatoes and basil is a question every gardener asks when planning a summer garden.
Tomatoes and basil are a classic pairing, but you can plant so much more alongside them to boost growth and flavor.
Knowing what to plant with tomatoes and basil helps you create a thriving, productive garden bed.
When you decide what to plant with tomatoes and basil, you’re also choosing companions that repel pests and attract pollinators.
In this post, we’ll explore the best companions for tomatoes and basil, what to avoid, and how to design your perfect garden.
Let’s dig into the secrets of what to plant with tomatoes and basil.
Why What to Plant With Tomatoes and Basil Matters
Choosing what to plant with tomatoes and basil isn’t just about filling space.
It’s about creating a mini-ecosystem where each plant supports the others.
Tomatoes need full sun, rich soil, and consistent watering, and basil loves the same conditions.
When you plant certain companions, you can improve soil health, deter harmful insects, and even enhance the taste of your tomatoes.
Understanding what to plant with tomatoes and basil can mean the difference between a good harvest and a great one.
Here are the top reasons why companion planting matters.
1. Natural Pest Control
When you think about what to plant with tomatoes and basil, pest control is a top benefit.
Basil’s strong scent confuses tomato hornworms and other pests that rely on smell to find their host plants.
Adding marigolds to your tomato and basil bed repels nematodes in the soil.
Nasturtiums act as a trap crop, luring aphids away from your precious tomatoes.
So including these plants in your what to plant with tomatoes and basil plan reduces the need for chemical sprays.
2. Improved Flavor and Growth
Some gardeners swear that basil makes tomatoes taste sweeter when grown nearby.
While science isn’t 100% sure why, it’s a beloved tradition in the kitchen garden.
When you plant carrots with tomatoes and basil, the carrots break up the soil.
This allows tomato roots to reach deeper for nutrients and water.
So part of deciding what to plant with tomatoes and basil is about boosting overall vigor.
3. Maximizing Space
What to plant with tomatoes and basil includes plants that don’t compete for the same resources.
Leafy greens like lettuce or spinach grow low and fast, filling the space beneath tomato plants.
These quick crops are harvested before the tomatoes really take off.
This interplanting is a smart answer to what to plant with tomatoes and basil when your garden is small.
You get more food from the same square footage.
Top Companion Plants for Tomatoes and Basil
Now let’s get into the specific list of what to plant with tomatoes and basil.
These companions have proven benefits and are easy to grow alongside your summer staples.
Remember, every garden is different, so experiment to see what works best in your climate.
1. Marigolds
Marigolds are a must in any what to plant with tomatoes and basil discussion.
Their roots release chemicals that kill harmful nematodes in the soil.
The bright flowers also attract pollinators and hoverflies, which eat aphids.
Plant marigolds around the edge of your tomato and basil bed for a colorful, functional border.
They’re low-maintenance and thrive in the same hot, sunny conditions.
2. Carrots
Carrots are another excellent answer to what to plant with tomatoes and basil.
They grow underground, so they don’t compete for sunlight.
In fact, carrots help aerate the soil as they grow, benefiting tomato roots.
Plus, the basil’s strong scent may confuse carrot flies that would normally target carrots.
Sow carrot seeds directly between your tomato plants for a double harvest.
3. Onions and Garlic
When wondering what to plant with tomatoes and basil, don’t forget alliums.
Onions and garlic have pungent smells that mask tomatoes from pests like aphids and spider mites.
They also have antifungal properties that can help prevent soil-borne diseases.
Plant a few cloves of garlic or onion sets around the base of your tomatoes.
This trio of tomatoes, basil, and alliums is a powerhouse of pest prevention.
4. Nasturtiums
Nasturtiums are gorgeous, edible flowers and a smart addition to your what to plant with tomatoes and basil plan.
They act as a sacrificial plant, attracting aphids and other sap-suckers away from your tomatoes.
The flowers also add a peppery kick to salads, so you get a bonus crop.
Let nasturtiums trail along the ground to act as a living mulch.
This keeps the soil cool and moist while deterring pests.
5. Lettuce and Spinach
For a true space-saving approach to what to plant with tomatoes and basil, add leafy greens.
Lettuce and spinach are shallow-rooted and grow quickly, perfect for the shade under tomato plants.
They’ll be harvested long before the tomatoes need full room to spread.
These greens also appreciate the cooler soil provided by tomato foliage.
It’s a win-win for your dinner plate and your garden layout.
6. Asparagus
Asparagus is a perennial that pairs surprisingly well with tomatoes.
It releases a chemical called asparagusic acid that repels nematodes.
Tomatoes, in turn, repel asparagus beetles.
This is a long-term partnership in your what to plant with tomatoes and basil strategy.
Just give asparagus its own corner, as it will come back year after year.
7. Chives
Chives are related to onions and another great answer to what to plant with tomatoes and basil.
Their mild onion scent can ward off Japanese beetles and other pests.
Chives are hardy perennials that will return each spring.
You can snip them fresh to add a mild onion flavor to your tomato dishes.
They’re a compact plant that won’t crowd your tomatoes or basil.
What Not to Plant With Tomatoes and Basil
Just as important as knowing what to plant with tomatoes and basil is knowing what to avoid.
Some plants can compete too aggressively or attract the wrong pests.
Here’s what to keep out of your tomato and basil bed.
1. Brassicas
Cabbage, broccoli, and kale are heavy feeders that compete with tomatoes for nutrients.
They also attract pests like cabbage loopers that can damage tomato leaves.
So when deciding what to plant with tomatoes and basil, skip the brassicas.
Give them their own separate garden bed.
2. Corn
Corn is a tall plant that will shade out your tomatoes.
It also attracts tomato fruitworms, also known as corn earworms.
These pests are a double threat, so it’s best to keep them apart.
This is a classic “don’t” in any what to plant with tomatoes and basil guide.
3. Fennel
Fennel is notorious for inhibiting the growth of many garden plants.
It releases chemicals that can slow tomato development significantly.
This is one of the most important plants to exclude from your what to plant with tomatoes and basil list.
Keep fennel far away, in a separate herb bed.
4. Potatoes
Tomatoes and potatoes are both nightshades, so they share common diseases.
Planting them together increases the risk of early blight and late blight.
They also compete heavily for the same soil nutrients.
So when planning what to plant with tomatoes and basil, leave potatoes out.
So, What to Plant With Tomatoes and Basil?
So, what to plant with tomatoes and basil?
You should plant marigolds, carrots, onions, garlic, nasturtiums, lettuce, spinach, asparagus, and chives alongside them.
These companions offer natural pest control, better soil structure, and efficient use of garden space.
Avoid brassicas, corn, fennel, and potatoes near your tomato and basil bed.
A well-planned garden of tomatoes, basil, and their best friends will be healthier and more productive.
Now you know exactly what to plant with tomatoes and basil for a thriving, beautiful garden this season.
Happy planting, and enjoy the delicious harvest.