📥 Download Your Free Companion Planting Chart
Use this chart as a planning reference before you plant tomatoes, peppers, carrots, beans, cucumbers, lettuce, herbs, flowers, brassicas, squash, onions, and root crops. The printable version is designed for garden notebooks, seed-starting trays, raised-bed plans, and shed walls.
⬇️ Download Free PDF Chart30+ Common Plants
Vegetables, herbs, flowers, pollinator plants, aromatic companions, trap crops, and classic garden pairings.
Print-Ready Layout
Designed for quick reference while planning beds, labeling seed trays, or choosing neighbors for container gardens.
Good and Avoid Columns
See useful companions, questionable neighbors, and practical reasons behind each pairing at a glance.
Practical and Balanced
Includes science-backed mechanisms plus honest caveats where traditional claims are not strongly proven.
🔎 Semantic Keywords Included
These related search phrases are naturally included throughout the page to cover the topic fully without keyword stuffing.
📊 Companion Planting Chart Preview
| Plant | Good Companions | Avoid or Separate | Why It Helps |
|---|---|---|---|
| Tomatoes | Basil, marigolds, parsley, chives, onions, carrots, calendula, nasturtiums | Fennel, black walnut, potatoes, crowded brassicas, corn nearby in pest-heavy areas | Basil and flowers can attract beneficial insects and increase biodiversity; onions/chives add aromatic confusion; marigolds are often used for nematode and insect management. |
| Carrots | Onions, leeks, chives, lettuce, radishes, rosemary, sage, peas | Dill when mature, parsnips in tight rotations | Alliums can help confuse carrot pests; radishes can mark rows and loosen the surface; lettuce uses space above shallowly. |
| Beans | Corn, squash, cucumbers, carrots, celery, radishes, strawberries | Onions, garlic, leeks, chives | Beans fix nitrogen and can climb corn in Three Sisters systems; alliums may reduce bean growth in many traditional charts. |
| Lettuce | Carrots, radishes, beets, onions, strawberries, cucumbers, tomatoes, dill | Crowded parsley, hot full-sun companions without shade | Lettuce fits between slower crops and benefits from light shade as weather warms; fast harvest makes it useful for interplanting. |
| Peppers | Basil, onions, carrots, parsley, marigolds, oregano, tomatoes, zinnias | Fennel, overcrowded beans, heavy shade crops | Herbs and flowers increase biodiversity and attract beneficial insects; peppers share similar growing needs with tomatoes and basil. |
| Cucumbers | Beans, peas, corn, radishes, dill, nasturtiums, sunflowers, marigolds | Potatoes, very aromatic herbs in tight spaces, melons if disease pressure is high | Legumes support soil nitrogen; flowers attract pollinators; radishes and nasturtiums are commonly used in pest-management plans. |
| Brassicas | Dill, thyme, rosemary, sage, onions, calendula, nasturtiums, chamomile | Strawberries, pole beans in tight rows, tomatoes in crowded rotations | Aromatic herbs and flowers support beneficial insects and can help confuse cabbage-family pests. |
| Corn | Pole beans, squash, pumpkins, cucumbers, melons | Tomatoes in pest-prone gardens, celery in shade conflicts | Corn can support climbing beans; squash acts as living mulch in Three Sisters-style systems. |
| Squash | Corn, beans, nasturtiums, marigolds, radishes, borage, dill | Potatoes, crowded cucurbits with poor airflow | Flowers attract pollinators; large leaves shade soil; trap-crop strategies may help monitor pest pressure. |
| Basil | Tomatoes, peppers, oregano, marigolds, parsley | Rue, sage in small pots with different water needs | Basil fits warm-season beds and attracts pollinators when allowed to flower; it is a classic tomato companion. |
| Marigolds | Tomatoes, peppers, eggplant, cucumbers, squash, many flowers | Avoid relying on marigolds as the only pest-control method | French marigolds are commonly used for nematode management and beneficial insect attraction, but results depend on species, timing, and pest pressure. |
| Onions / Garlic | Carrots, beets, lettuce, tomatoes, peppers, brassicas, strawberries | Beans, peas, asparagus in some charts | Strong aromas may confuse some pests; alliums are useful border plants but can conflict with legumes. |
👆 Swipe left/right to see all columns on mobile
Preview showing selected high-value pairings. Full printable chart can include 30+ plants, crop families, spacing notes, and rotation reminders.
🌟 What Companion Planting Really Means
Companion planting means growing different plants near each other because the combination may provide a useful benefit. The benefit might be pest confusion, pollinator attraction, better use of space, nitrogen contribution, shade, support, weed suppression, soil coverage, or simply a more diverse garden ecosystem. It does not mean every chart pairing works perfectly in every climate, soil, pest situation, container, or raised bed.
The most helpful way to use a companion planting chart is as a planning tool, not as an unbreakable law. A tomato does not automatically become healthier because basil is nearby. A marigold does not magically remove every pest. Beans do not instantly feed heavy-feeding corn in the same week they are planted. Companion planting works best when it is combined with good soil, proper spacing, crop rotation, watering, mulching, healthy seedlings, pest monitoring, and observation.
For beginners, the chart helps you avoid obvious conflicts and choose combinations that make practical sense. Tall plants can shade tender greens. Fast crops can fill empty space before slow crops mature. Flowers can bring pollinators into vegetable beds. Aromatic herbs can make pest-finding harder for some insects. Legumes can improve soil nitrogen over time. Dense living mulch can reduce bare soil. These are practical reasons to plan plant neighbors carefully.
Companion planting is especially useful in small gardens because every inch matters. A large farm can separate crops into big blocks, but a balcony planter, 4×8 raised bed, or community garden plot needs smarter stacking. You can plant lettuce under young tomatoes, grow basil at the edge of a pepper pot, put flowers around cucumbers, use radishes to mark carrot rows, or grow pole beans up corn or a trellis. The goal is not random mixing; the goal is functional diversity.
Use companion planting as one layer of garden strategy. Do not replace crop rotation, soil care, pest identification, proper spacing, and watering with a chart alone.
🧠 Why Companion Planting Works
1. Pest Confusion and Scent Masking
Many insects find host plants through smell, color, plant shape, and repeated landing cues. A large block of one crop can be easier for pests to locate than a mixed planting. When herbs, flowers, and vegetables are interplanted, pest insects may have a harder time finding the exact host plant they prefer. This is why aromatic herbs, alliums, flowers, and mixed borders are often recommended around vulnerable crops.
2. Trap Cropping
A trap crop is a plant used to attract pests away from your main crop. The trap crop must be managed, not ignored. If pests gather on a trap crop and you leave them there, the trap crop can become a pest nursery. Good trap cropping means planting the trap crop early enough, monitoring it often, and removing pests before they spread. Nasturtiums for aphids, mustard for flea beetles, and blue Hubbard squash for squash pests are examples gardeners often test.
3. Beneficial Insect Support
Many beneficial insects need pollen, nectar, shelter, or alternative prey. Flowers such as dill, cilantro, calendula, alyssum, cosmos, zinnias, marigolds, yarrow, and buckwheat can attract pollinators and natural enemies. Pollinators help fruiting crops such as squash, cucumbers, melons, and berries. Predatory insects and parasitoids can help reduce pest populations when the garden offers habitat.
4. Nitrogen Fixation
Legumes such as beans, peas, clover, and vetch can form relationships with nitrogen-fixing bacteria. This does not mean a bean plant instantly feeds every plant beside it during the same season. Much of the benefit comes when roots, residues, or cover crops decompose and release nitrogen back into the soil. Still, legumes are valuable in crop rotations, cover cropping, and interplanting systems.
5. Physical Support
Some plants act as living structures. Corn can support climbing beans in traditional Three Sisters systems. Sunflowers can support small climbing vines if their stems are strong enough. Taller plants can create a windbreak for delicate seedlings. Physical support is one of the easiest companion benefits to understand because you can see it happening.
6. Shade and Microclimate
Tall crops can shade cool-season crops in hot weather. Lettuce, spinach, cilantro, parsley, and arugula may last longer when protected from harsh afternoon sun. A tomato cage can create a partial-shade zone below. Corn or trellised cucumbers can create a cooler edge. In hot climates, shade is not a weakness; it is a planning tool.
7. Weed Suppression and Soil Cover
Bare soil invites weeds and loses moisture. Low-growing crops, living mulch, squash leaves, strawberries, and dense plantings can reduce bare ground. The key is balance: enough coverage to protect soil, but not so much crowding that airflow disappears or crops compete severely for water and nutrients.
🍅 Best Companion Planting Pairings for Beginners
Tomatoes + Basil + Marigolds
This is one of the most popular companion combinations because the plants share warm-season needs. Basil fits well near tomatoes and peppers, while marigolds add flowers, pollinator support, and potential pest-management benefits. Keep spacing realistic so the tomato still has airflow.
Carrots + Onions + Radishes
Onions and chives are often planted near carrots because their strong scent may confuse pests. Radishes germinate quickly and can mark carrot rows while slower carrot seedlings emerge. Harvest radishes early so carrots have room.
Corn + Beans + Squash
The Three Sisters system uses corn for support, beans as a legume, and squash as a ground-covering crop. In small gardens, use compact versions and give the planting enough room. Crowding this system into a tiny bed can disappoint beginners.
Lettuce + Radishes + Carrots
This combination uses space efficiently. Radishes mature quickly, lettuce gives early leaves, and carrots take longer. It works well in spring and fall when cool weather supports leafy growth.
Cucumbers + Dill + Nasturtiums
Cucumbers need pollination for good fruit set. Dill flowers can support beneficial insects, while nasturtiums are often used as a trap crop or pest-monitoring plant. Provide trellis space and airflow.
Peppers + Basil + Oregano
Peppers and basil enjoy warmth, sun, and similar watering. Oregano can spill over the edge of a large container if it is kept controlled. This pairing works well in patio planters.
Start with two or three pairings, not the whole chart. Try tomatoes with basil and marigolds, carrots with onions, and lettuce under taller crops. Track what works in your own garden.
🚫 Plants Often Listed as “Avoid” Companions
Avoid lists can be confusing because different charts disagree. Some warnings are based on pest sharing, some on nutrient competition, some on allelopathy, some on disease risk, and some on old garden tradition. Treat avoid lists as caution flags. If space is limited, prioritize avoiding the strongest conflicts first.
Fennel
Fennel is commonly listed as a poor companion for many vegetables because it can inhibit nearby plant growth and does not fit neatly into most vegetable beds. Grow fennel in its own corner, container, or separate pollinator area if you want it.
Black Walnut
Black walnut produces juglone, which can harm sensitive plants such as tomatoes, peppers, eggplants, potatoes, and some other crops. Avoid planting susceptible vegetables near black walnut trees or roots.
Onions and Beans
Alliums such as onions, garlic, leeks, and chives are often listed as poor neighbors for beans and peas. If your garden is small, separate alliums and legumes by a few rows or use different beds.
Potatoes and Tomatoes
Potatoes and tomatoes are both nightshades and can share some diseases. They also compete heavily. In small gardens, rotate them carefully and avoid placing them side by side year after year.
Overcrowded Brassicas and Tomatoes
Brassicas and tomatoes can both become large and hungry. The bigger issue is often crowding, airflow, and nutrient competition rather than an instant chemical conflict. Give each crop enough space and avoid planting heavy feeders too close in small beds.
“Avoid” does not always mean two plants will instantly fail. It often means spacing, disease risk, competition, pest sharing, or growth habit makes the pairing less ideal.
📖 How to Use This Companion Planting Chart
Step 1: List Your Main Crops
Start with the vegetables you actually want to grow. Do not plan around companion plants first. If your main goal is tomatoes, peppers, cucumbers, beans, lettuce, carrots, or herbs, put those crops in the plan first. Companion plants should support your main crops, not take over the garden.
Step 2: Match Crop Families
Understand crop families because related crops often share pests and diseases. Tomatoes, peppers, eggplants, and potatoes are nightshades. Cabbage, broccoli, kale, cauliflower, radishes, and turnips are brassicas. Cucumbers, melons, squash, and pumpkins are cucurbits. Beans and peas are legumes. Crop families matter for rotation and disease prevention.
Step 3: Choose Companion Functions
Ask what job you need the companion to do. Do you need pollinators? Choose flowers. Do you need shade? Use a taller crop. Do you need ground cover? Use low-growing plants or mulch. Do you need pest monitoring? Try trap crops. Do you need soil improvement? Use legumes or cover crops. A chart becomes more powerful when every plant has a role.
Step 4: Respect Spacing
Many companion planting failures are actually spacing failures. Two plants may be compatible in theory but still compete if crowded. Tomatoes need airflow. Squash needs space. Cabbage needs room to form heads. Basil can be near tomatoes, but it should not be buried under tomato foliage. Companion planting should not become plant crowding.
Step 5: Keep Notes
Garden results vary by climate, soil, pests, water, timing, and variety. Keep notes on what you planted together, what grew well, what attracted pests, and what you would repeat. Your own garden notes are more valuable than any generic chart after a few seasons.
🌿 Companion Planting for Small Spaces and Containers
Companion planting is useful for container gardens, but container rules are stricter. Plants in one pot share limited soil, water, and nutrients. A pairing that works in a raised bed may fail in a small container because roots compete too strongly. Choose plants with similar light and water needs.
Good Container Combinations
- Tomato + basil + marigold: Use a large container and keep basil near the edge.
- Pepper + basil + oregano: Good for sunny patios with regular watering.
- Lettuce + radish + chives: Good for cool-season balcony boxes.
- Strawberry + lettuce + calendula: Attractive and productive in wide planters.
- Cucumber + nasturtium: Use a trellis and a large container.
Container Mistakes
- Do not put too many heavy feeders in one small pot.
- Do not mix dry-loving herbs like rosemary with moisture-loving crops in a tiny container.
- Do not grow mint loose with vegetables because it can dominate the pot.
- Do not skip drainage holes.
- Do not forget fertilizer because containers lose nutrients faster than beds.
Best Container Rule
In containers, compatibility means similar sunlight, water, root space, and harvest timing. Pest-control claims are secondary. The plants must first be able to live well in the same container.
🌸 Flowers and Herbs That Improve Companion Planting
Flowers and herbs are often the easiest companion plants to add because they fit along bed edges, between vegetables, in containers, and near paths. They attract pollinators, support beneficial insects, add color, and make the garden more resilient.
Calendula, Zinnias, Cosmos, Alyssum
These flowers help attract bees, butterflies, hoverflies, and other beneficial insects. Plant them near cucumbers, squash, melons, peppers, beans, and tomatoes.
Basil, Chives, Dill, Cilantro
Aromatic herbs add scent diversity, flowers, and edible harvests. Let a few herbs flower to support beneficial insects, but keep self-seeding under control.
Nasturtiums and Mustard
These can attract certain pests away from main crops, but they must be monitored. Remove pest-heavy leaves or plants before pests spread.
Clover, Vetch, Peas, Beans
Legumes support soil nitrogen cycles and can be useful in rotations, cover cropping, and interplanting plans.
🧩 Companion Planting Guild Examples
Tomato Guild
A tomato guild might include one tomato plant, basil near the edge, marigolds or calendula at the front, chives or onions nearby, and lettuce early in the season before the tomato canopy fills in. This guild uses vertical space, edible herbs, flowers, pest confusion, and early-season interplanting.
Carrot Guild
A carrot guild can include carrots, onions, chives, radishes, and lettuce. Radishes germinate quickly and help mark rows. Lettuce uses shallow space and can be harvested before carrots need more room. Alliums add scent diversity.
Cucumber Guild
A cucumber guild can include trellised cucumbers, dill, nasturtiums, marigolds, and a few radishes. The trellis saves space, flowers attract pollinators, and herbs add biodiversity. Keep airflow strong to reduce disease.
Brassica Protection Guild
A brassica bed with kale, cabbage, or broccoli can include thyme, dill, onions, calendula, and nasturtiums. The goal is to attract beneficial insects and add scent diversity around cabbage-family crops that often attract caterpillars and aphids.
Three Sisters-Inspired Guild
The classic Three Sisters combination uses corn, climbing beans, and squash. In small gardens, adapt it carefully. Use enough corn for wind pollination, choose manageable bean varieties, and give squash room. For containers, a full Three Sisters planting is usually difficult unless the container is very large.
📈 20 Research Angles Used for This Update
This page was expanded around the most useful search-intent points for gardeners downloading a companion planting chart.
- Printable companion planting chart search intent.
- Vegetable companion planting combinations.
- Tomato companion plants and avoid plants.
- Carrot and onion interplanting.
- Beans, corn, and squash in Three Sisters systems.
- Beneficial insect habitat from flowers and herbs.
- Trap crops and how to manage them.
- Nitrogen fixation from legumes.
- Living mulch and weed suppression.
- Shade and microclimate planning.
- Crop-family rotation reminders.
- Companion planting caveats and research limits.
- Container companion planting rules.
- Raised-bed companion planting layout.
- Plants commonly listed as avoid companions.
- Flowers for vegetable gardens.
- Herbs for pest confusion and pollinators.
- Chart usability for mobile and print.
- Garden guild examples.
- FAQ schema for companion planting searches.
❓ Trending FAQs About Companion Planting
What is companion planting?
Companion planting is the practice of growing different plants near each other because the combination may support pest management, pollination, soil health, shade, physical support, weed suppression, or better use of garden space.
Does companion planting really work?
Some companion planting methods work through clear mechanisms such as trap cropping, nitrogen fixation, beneficial insect habitat, shade, and support. Other traditional claims are less proven. Use the chart as a planning guide and track results in your own garden.
What are the best companion plants for tomatoes?
Common tomato companions include basil, marigolds, parsley, chives, onions, calendula, carrots, and nasturtiums. Avoid fennel, black walnut, and repeated close planting with potatoes because of disease and growth concerns.
What should not be planted with tomatoes?
Tomatoes are often separated from fennel, black walnut, potatoes, and overcrowded heavy feeders. Some gardeners also avoid placing corn nearby in pest-heavy areas because corn can share pest pressure.
What are good companion plants for carrots?
Carrots are commonly planted with onions, leeks, chives, lettuce, radishes, peas, rosemary, and sage. Radishes can mark rows, while alliums may help confuse carrot pests.
Can beans and onions grow together?
Many companion charts recommend separating beans and onions, garlic, leeks, or chives because alliums may reduce legume growth. Separate them by a few rows or use different beds when possible.
What is the Three Sisters planting method?
The Three Sisters method combines corn, pole beans, and squash. Corn provides support, beans contribute to nitrogen cycling, and squash covers the soil as living mulch. It needs enough space to work well.
Do marigolds help vegetable gardens?
Marigolds can support vegetable gardens by adding flowers, attracting beneficial insects, and in some cases helping with nematode management. They are helpful, but they should not be the only pest-control strategy.
What flowers are best for companion planting?
Useful flowers include calendula, marigolds, nasturtiums, alyssum, zinnias, cosmos, borage, yarrow, and dill or cilantro flowers. They can attract pollinators and beneficial insects.
Can companion planting be used in containers?
Yes, but container pairings must have similar light, water, and root-space needs. Good examples include tomato with basil, pepper with basil, lettuce with radish, and cucumber with nasturtium in a large trellised container.
How close should companion plants be?
For pest confusion or pollinator support, companions are usually most useful within the same bed or a few feet of the main crop. Still, do not crowd plants so tightly that airflow, light, or root space suffers.
What is a trap crop?
A trap crop is a plant used to attract pests away from a more valuable crop. Trap crops must be monitored and managed, otherwise they can become pest nurseries.
Should I follow a companion planting chart exactly?
No. Use the chart as a starting point. Local climate, soil, pest pressure, crop variety, timing, and spacing can change results. Keep notes and adjust over time.
Can companion planting replace pesticides?
Companion planting can reduce pest pressure in some gardens, but it should be part of an integrated approach that includes monitoring, healthy soil, crop rotation, hand removal, barriers, and correct pest identification.
What is the easiest companion planting combination for beginners?
Start with tomatoes, basil, and marigolds; carrots, onions, and radishes; or lettuce under taller warm-season crops. These pairings are simple, useful, and easy to observe.
✅ Final Recommendation
The best way to use a companion planting chart is to combine it with common sense. Choose your main crops first, then add companions that have a job: attract pollinators, confuse pests, provide shade, cover soil, support vines, or use space before a slower crop matures. Avoid turning the chart into a rigid rulebook. The strongest gardens are diverse, well-spaced, well-watered, and observed carefully.
For beginners, start with a few reliable combinations. Plant basil and marigolds near tomatoes. Put onions or chives near carrots. Add flowers around cucumbers and squash. Grow lettuce under taller crops as the weather warms. Try beans with corn only if you have enough space. Keep notes, take photos, and compare results season by season.
Companion planting is not about perfection. It is about creating a garden where plants, insects, soil, and space work together more naturally. Use the downloadable chart as a quick reference, but let your own garden teach you which pairings deserve a permanent place in your planting plan.
Ready to Start Companion Planting?
Download your printable chart, plan your raised beds, and start building a healthier, more diverse garden with practical companion pairings.