What To Plant With Tomatoes - 8 Best Companion Plants For Tomatoes!

You've been doing everything right. The watering, the pruning, the soil prep. So why do your tomatoes keep struggling? I'll tell you exactly why, and more importantly, I'll show you how to fix it forever, starting today. Welcome back everyone. If you're new here, I'm so glad you found this channel. We talk about real gardening. Practical, honest, chemical-free growing tips that actually work in the real world. Now, here's something most gardeners never figure out until they've lost a whole season's harvest to pests or disease. Tomatoes are not meant to grow alone. They're social plants. They thrive when they have the right neighbors beside them. Plants that protect them, nourish them, and bring out the absolute best in them. And when you get that combination right, something almost magical happens in your garden. Your tomatoes get bigger, tastier, more resistant to disease, and somehow the whole garden just feels more alive. So today, I'm walking you through eight companion plants that belong in every tomato garden. Some of these you probably already have growing somewhere in your yard. Others might surprise you. But by the end of this video, you're going to have a clear, simple plan for building the strongest, healthiest tomato garden you've ever grown. Let's go. The first plant on this list is one that I will go to the grave defending as the single greatest companion plant ever to share soil with a tomato. And that plant is the marigold. I know, some of you just rolled your eyes. You've seen marigolds everywhere, in garden centers, in your grandmother's front bed, lining the edges of vegetable plots all over the world. But there's a reason gardeners have been planting marigolds next to tomatoes for generations. It's not tradition for tradition's sake. Marigolds genuinely work, and they work in ways that are hard to argue with once you understand the science. Let's start with the most important thing marigolds do for your tomatoes, and that's dealing with root-knot nematodes. Now, if you've never dealt with nematodes, consider yourself lucky, because they are one of the sneakiest, most frustrating threats to a tomato plant. They live in the soil, they attack the roots, and by the time you notice your plants are struggling, the damage is already done. Marigolds release a natural compound into the soil that is toxic to these nematodes. Not just repellent, actually toxic. Studies have shown that planting French marigolds in particular can dramatically reduce nematode populations in the soil over a single growing season. That's not a small thing. That's potentially the difference between a harvest and a disaster. But marigolds don't stop at nematodes. They also release a gaseous substance called limonene from their leaves and flowers, and that compound is genuinely repellent to some of the most destructive above-ground pests your tomatoes will ever face—aphids and tomato hornworms chief among them. These pests navigate largely by scent, and the chemical signal marigolds send out essentially tells them, there is nothing here for you. Keep moving. Which means your tomatoes get a kind of invisible force field, and all it costs you is the price of a few marigold seedlings. And let's not forget, marigolds are beautiful. There's something deeply satisfying about a garden that is both productive and gorgeous, and marigolds in shades of gold, amber, orange, and deep red deliver on that front every single time. Plant them around the perimeter of your tomato bed, intersperse them between plants, or tuck them into any gaps you have. You genuinely cannot overdo it with marigolds. Now let's talk about a plant that most people grow in a completely separate part of their garden, never realizing it would be far more useful sitting right next to their tomatoes. I'm talking about basil. Tomato and basil—you already know how well they work together on a plate. A little fresh basil on a tomato salad, scattered over a bruschetta, stirred into a pasta sauce—the pairing just makes sense. But what most people don't know is that this relationship runs much deeper than flavor. These two plants are genuinely good for each other in the ground, long before they ever end up in your kitchen. Basil is one of the most effective natural insect repellents in the plant kingdom. That distinctive, sharp, herby scent that we find so appealing, pests absolutely cannot stand it. The compound responsible is called eugenol, and it's essentially a natural warning signal that tells aphids, whiteflies, and a whole range of other unwanted insects that this neighborhood is not for them. When you plant basil near your tomatoes, those pests pick up on the scent of the basil and redirect their attention elsewhere. Your tomatoes, sheltered by that aromatic shield, get left alone. There's also evidence—and this is the part that really fascinates me—that basil may actually improve the flavor of tomatoes when grown in close proximity. The exact mechanism isn't fully understood, but gardeners and researchers alike have noticed that tomatoes grown alongside basil tend to develop a richer, more complex flavor than those grown without it. Whether it's something in the root chemistry, the volatile compounds exchanged between the plants above soil, or something else entirely, the result is real—your tomatoes taste better. Plant basil roughly 10 to 12 inches from your tomato plants. It doesn't need a lot of space, it grows quickly, and as a bonus, you'll have a constant supply of fresh basil right there in the garden whenever you need it for cooking. It really is one of those rare situations where the companion planting benefit and the practical kitchen benefit overlap completely. Our third companion plant is one that might raise a few eyebrows, but trust me, once you understand what it brings to the table, you'll be making space for it immediately. That plant is garlic. Garlic has been used for centuries across cultures as a natural repellent, and with very good reason. The source of its power is a compound called allicin, the same thing responsible for that unmistakable pungent smell. To us, garlic smells like good food. To a wide range of insects and garden pests, it smells like danger. Planting garlic alongside your tomatoes creates a natural barrier against some of the most persistent pests in the tomato garden. Leafhoppers, whiteflies, spider mites, and even certain species of aphids will avoid areas where garlic is present. But beyond pest control, garlic also has antifungal properties that help protect tomatoes from one of their most devastating diseases, late blight. Late blight spreads fast, it destroys plants quickly, and once it takes hold, it is incredibly difficult to manage. Garlic doesn't guarantee immunity, but it creates an environment that is significantly less hospitable to the fungal spores that cause it. The best way to plant garlic with tomatoes is to keep them about 20 inches apart, either on adjacent beds or alternating in the same bed. Don't crowd them. Give both plants enough room to grow properly, and they'll work together beautifully across the whole season. And at the end of the season, you harvest the garlic. So you're getting pest protection and a flavorful crop out of the same space. That's just good gardening. Let's move on to our fourth plant, and this one is a bit of an unsung hero. It doesn't have the flashy reputation of marigolds, or the Titchen fame of basil and garlic, but if you care about soil health—and you should, because healthy soil is the foundation of everything—then you need borage in your tomato garden. Borage is a somewhat unusual looking plant with star-shaped blue flowers that are actually edible, and a slightly hairy, rough texture on its leaves. It's not the most glamorous plant on this list, but what it does for the plants around it is genuinely impressive. For tomatoes specifically, borage has been observed to enhance both flavor and overall plant growth, similar to basil, though through what appears to be a different mechanism. Some gardeners swear their tomatoes taste noticeably better when grown near borage, and their plants grow more vigorously. Anecdotal? Maybe, but the consistency of that observation across so many growers is hard to see. Borage is also one of the most effective bee attractors you can grow. Even in cooler weather, even on days when most flowering plants have shut down, borage keeps producing those blue flowers, and bees keep coming. For tomatoes, which depend on pollination to set fruit, having a reliable pollinator magnet right next door makes a real difference in how many tomatoes your plants ultimately produce. More bees, more pollination, more fruit. It's that direct. And borage deters tomato hornworms, which is a significant bonus because hornworms are one of the most destructive caterpillars you'll deal with in a tomato garden. They're large, they eat fast, and they can strip a plant in a matter of days. Having borage nearby reduces the likelihood of hornworms setting up camp. If you're finding this helpful and you haven't subscribed yet, now is the perfect time. Hit that subscribe button and tap the bell so you never miss a video. We drop content like this every week and you don't want to be late to the party. And while you're down there, drop a comment and tell me which companion plant you're already growing. I read every single comment and I'd love to hear from you. All right, let's keep going. Our fifth companion plant is one that proves you don't always need something exotic or unusual to make a big difference. Sometimes the most familiar herbs in your kitchen garden are doing more than you realize. I'm talking about parsley. Parsley is quiet, unassuming, and almost always underestimated. But plant it near your tomatoes and it becomes something of a secret weapon against one of the most persistent problems in any garden. Aphids. Here's how it works. Parsley is exceptional at attracting certain beneficial insects, specifically ladybugs, hoverflies, and parasitic wasps. Now these might not sound like allies, but in the garden they are absolutely essential. Ladybugs are voracious predators of aphids. A single ladybug can consume dozens of aphids in a single day. Hoverflies, whose larvae are equally predatory, do the same. Parasitic wasps target hornworm larvae specifically, laying their eggs inside them and preventing the next generation from ever reaching your plants. By planting parsley near your tomatoes, you're essentially sending out a standing invitation to all of these beneficial insects. You're saying, there is food here, there is habitat here, come and stay. And when they come, they go to work on the pests that otherwise would be targeting your tomatoes. It's biological pest control operating completely on its own, with no intervention from you. And again, at the end of the season, you have parsley. Fresh, aromatic, delicious parsley that you grew yourself, right there in the garden. The companion planting benefits and the culinary benefits are working side by side. Plant parsley anywhere around your tomato bed. It doesn't need a particular spacing or position. It's adaptable, hardy and low maintenance. Just get it in the ground near your tomatoes and let it do its work. Our sixth plant is one that changes the feel of the whole garden the moment you add it. It's not just a companion plant, it's a statement. And that plant is lavender. There is something about lavender in a garden that just feels right. The color, the scent, the soft hum of bees moving between the flower spikes on a warm afternoon. It's one of those plants that makes you remember why you started gardening in the first place. But beyond its beauty and its calming presence, lavender is doing something very specific and very valuable for your tomatoes. Lavender is one of the most powerful pollinator attractors in the plant world. Bees absolutely love it. Butterflies love it. Beneficial insects of all kinds are drawn to it repeatedly throughout the season. And for a tomato plant, which needs pollination to produce fruit, having a reliable source of pollinator activity right next door is enormously beneficial. Better pollination means more fruit set. More fruit set means a bigger harvest. It really is that simple. At the same time, that scent that we find so soothing and pleasant, most pest insects find it completely overwhelming and actively avoid areas where lavender is growing. So you're getting a dual effect, drawing in the insects you want and simultaneously repelling the ones you don't. That's a powerful combination. Lavender also tends to thrive in similar conditions to tomatoes. Full sun, well-drained soil, so they make easy neighbors from a horticultural standpoint. Plant lavender along the edges of your tomato bed where it can catch full sun and spill a little over the pathway. It'll be one of the most visually stunning and practically useful decisions you make in the garden this season. Our seventh plant is one that I think every vegetable gardener should be growing full stop, not just as a companion for tomatoes, but for the incredible job it does improving the soil and the overall ecosystem of the garden. That plant is crimson clover. Crimson clover is what's known as a cover crop and nitrogen fixer. Nitrogen is one of the most essential nutrients for plant growth, and one of the most commonly depleted in vegetable gardens. Most gardeners compensate by adding fertilizer, which works, but it's an ongoing cost and an ongoing cost. Crimson clover takes a completely different approach. It hosts specific bacteria in its root nodules that pull nitrogen from the atmosphere and fix it directly into the soil. Over time, growing crimson clover near your tomatoes gradually increases the natural nitrogen content of the soil, reducing your need for supplemental feeding. Beyond nitrogen, crimson clover improves soil structure. Its root system helps break up compacted soil, improving drainage and aeration in a way that directly benefits the root development of your tomatoes. It also suppresses weeds by forming a low, dense ground cover that shades out weed seeds before they can germinate. That's less weeding for you and less competition for your tomatoes. And like lavender and borage, crimson clover is an excellent pollinator attractor. Those bright crimson flower heads are irresistible to bees and other beneficial insects, bringing more life and more activity into your garden at exactly the time your tomatoes need it most. You can sow crimson clover between rows of tomatoes or along the outer edges of the bed. It doesn't crowd or compete aggressively. It's a generous, giving plant that puts more into the soil than it takes out. Every vegetable garden deserves at least a patch of it. And that brings us to our eighth and final companion plant. And I've saved this one for last not because it's the least important—quite the opposite—but because I think it's the one that surprises people the most. That plant is calendula. Calendula is sometimes called pot marigold, and while it shares a common name and a visual similarity with true marigolds, it's actually a completely different plant from a different botanical family. But what it shares with marigolds is a fierce determination to protect the plants growing near it. Calendula produces flowers in warm shades of orange, yellow, and gold, and those flowers release a scent that is powerfully deterrent to some of the most damaging pests in the tomato garden. Greenhouse whiteflies, hornworms, aphids—all of them find the smell of calendula deeply unappealing and will actively avoid planting areas where it's present. Some research also suggests that calendula root secretions have a nemicidal effect similar to true marigolds, reducing root-knot nematode populations in the surrounding soil over time. Beyond pest deterrence, calendula attracts hoverflies—those beneficial insects we talked about when we discussed parsley—which means you're building up a double layer of aphid control when you plant both parsley and calendula in the same garden space. The hoverfly larvae that the draws in will feed on aphids, and the scent of the calendula will prevent new aphid colonies from establishing in the first place. That's a powerful combination. Calendula is also incredibly easy to grow. It self-seeds readily, meaning once you've planted it the first time, it'll often come back on its own the following season without any effort from you. It's low-maintenance, long-flowering, beautiful, and deeply beneficial. It belongs in every tomato garden, no question. Plant calendula around the edges of your bed, between plants, or anywhere you have a gap. It fills space beautifully, looks stunning alongside the green of tomato foliage, and goes to work protecting your plants from the moment it starts to flower. So there you have it. Eight companion plants that will transform the way your tomatoes grow. Let's do a quick recap so it all stays with you. Marigolds to protect the roots and repel pests with limonene. Basil to send harmful insects in the other direction while improving the flavor of your fruit. Garlic to guard against late blight and deter a wide range of insects. Borage to attract pollinators and enhance growth. Parsley to invite ladybugs and hoverflies to do your pest control for you. Lavender to bring bees in and keep pests away. Crimson clover to feed the soil, suppress weeds, and reduce your workload. And calendula to provide a beautiful, fragrant, natural defense at the edges of your garden. You don't need to plant all eight of them. Even choosing two or three from this list will make a measurable difference in the health, productivity, and flavor of your tomatoes. The goal is simple. Work with nature instead of against it. Let the garden become a living ecosystem where everything supports everything else. And you'll find that tomato growing stops feeling like a battle and starts feeling like something genuinely joyful. Because that's what it should be, right? It should feel good. It should feel like you're part of something. And when you walk out into a garden that is buzzing with bees, glowing with color, and producing more tomatoes than you know what to do with, you'll feel it. That quiet, deep satisfaction that only a garden can give you. Try companion planting this season. Start small if you need to. Pick one plant from this list, get it in the ground next to your tomatoes, and just watch what happens. I think you'll be surprised. I think you'll be converted. And I think you'll come back here next season with a story to tell. Which companion plant are you most excited to try? Drop it in the comments below. I genuinely read every single one and I love hearing what's working in your gardens around the world. If you got value from this video today, please give it a like before you go. It takes 2 seconds and it helps so many more gardeners find this channel. And if you haven't already, subscribe and hit that bell because we have so much more coming that you are absolutely not going to want to miss. Take care of your garden and take care of yourselves. Until next time, happy growing!