Veg Companion Planting Chart: Pairings, Spacing and Pitfalls (2026)

By Emily Parker

Updated November 2026

A veg companion planting chart shows which vegetables grow well side by side and which ones compete or attract the same pests. In this guide, you will learn how to read a chart, build your own version for your beds, and check spacing and timing so your pairings actually work. By the end, you will have a usable reference and a simple method for adjusting it to your garden.

What a Veg Companion Planting Chart Actually Tells You

Most charts list each vegetable down one side and across the top, then mark each intersection as helpful, neutral, or harmful. Some add notes on shared pests, nutrient needs, or shade tolerance. The value of the chart is not that it promises a magic result. It gives you a starting point for deciding what to plant next to what, so you can reduce obvious conflicts before they cost you a crop.

Shopping for one? See our guide: 6 Best Garden Layout Free Printable Printable Companion Planting Charts (2026): Our Picks.

Treat the chart as a set of hypotheses. Companion effects depend on climate, soil, pest pressure, and how closely you plant. A pairing that works in a humid Southeast garden may do nothing in a dry Mountain West bed. Use the chart to narrow your choices, then watch what happens in your own space.

How to Read the Symbols

• Beneficial pairs are often marked with a plus sign or green shading. These usually involve pest deterrence, pollinator attraction, or complementary root depths.
• Neutral pairs have no strong interaction. You can plant them together without much concern.
• Antagonistic pairs are marked with a minus sign or red shading. The most common reason is shared disease or pests, or one plant suppressing another through root exudates or competition for the same nutrients.

Many charts also include a note column. Read these carefully. A note such as “keep away from fennel” is more useful than a bare symbol, because it tells you the reason and whether the problem is about space, pests, or chemistry.

Step 1: Gather What You Need Before Building Your Chart

A chart is only useful if it matches your actual garden. Before you build or print one, collect the following:

1. A list of every vegetable you plan to grow this season, including varieties if you know them.
2. A rough map of your beds or containers, with dimensions and sun exposure noted.
3. Your USDA hardiness zone and average last spring frost date.
4. A notebook or spreadsheet to record what you plant and how it performs.

Step 2: Build Your Own Chart Column by Column

Start with a blank grid. List your crops down the left side and the same crops across the top. Fill in each intersection using a reliable reference, then add your own observations over time. Keep the chart to the vegetables you actually grow, since a 40-by-40 grid is hard to use at a glance.

Choose a Reliable Reference Source

Extension offices, university horticulture departments, and well-established seed catalogs tend to publish more careful pairing advice than viral social media posts. When sources disagree, note the disagreement on your chart instead of picking one answer silently. Disagreement often means the effect is small or depends on conditions.

Mark Spacing and Timing, Not Just Pairings

A helpful pair planted too densely can still fail. Add two more columns to your working chart: spacing and days to maturity. Tall crops such as pole beans or indeterminate tomatoes need sun protection from the south side of a bed, so the crops they shade should be shade-tolerant ones such as lettuce or chard. Crops with very different maturity dates can share a bed if you plan succession plantings in the gaps.

Step 3: Apply Spacing Rules for Common Vegetables

Spacing determines whether companions help or simply crowd each other. The table below gives typical in-ground spacing ranges for widely grown vegetables. Always check your seed packet, since varieties vary.

Step 4: Plan Layout Around Height, Shade, and Root Depth

Once your pairings are set, lay them out so taller plants do not shade shorter ones. Place tall crops on the north side of a bed in the Northern Hemisphere so their shadows fall away from the rest. Put shallow-rooted crops such as lettuce and radish near deep-rooted ones like tomatoes without worrying about direct competition for the same root zone.

In raised beds, a simple three-zone plan works well: tall plants along the back, medium plants in the middle, and low groundcovers or herbs along the front. Mark your zones on the chart so you can see at a glance where each crop belongs. For a fuller walkthrough of bed design, see Raised Bed Garden Layout Companion Planting: A Step-by-Step Guide.

Rotate Crops Across Seasons

A companion chart shows neighbors within a single season. It does not solve soil-borne disease or nutrient depletion. Rotate plant families so the same family does not return to the same bed every year, usually on a three- to four-year cycle. Your chart should include a rotation column so you can see both companion and rotation decisions together.

Step 5: Use Companion Pairs Where They Earn Their Place

Some pairings have well-supported reasons. Others are more folklore than fact. Focus your effort on the combinations that have a clear mechanism, then test the rest on a small scale.

• Tomatoes and basil is popular, and gardeners commonly report that basil grows well beside tomatoes, though research on repelled pests is mixed. The pairing is worth trying mainly for space efficiency and harvest convenience. Read more in Herb Companion Planting Guide: Pairings, Spacing and Pitfalls.
• Beans and cucumbers are often paired, but the benefit is largely about space use and trellising. Details are covered in Green Beans and Cucumber Companion Planting: A Step-by-Step Guide.
• Onions and lettuce pair well for space efficiency, since onions take up little room and lettuce is harvested early. See Onions and Lettuce Companion Planting: A Step-by-Step Guide for Beginners.
• Marigolds are widely planted at the edges of vegetable beds. Many extension resources note they can attract some beneficial insects, but reports of nematode control vary. For specifics, see Marigold for Companion Planting: A Step-by-Step Guide for Better Gardens.

Step 6: Adapt the Chart for Containers and Small Spaces

Containers change the math. Root competition is more intense because soil volume is limited, and watering and feeding need to be planned around each pot. A container version of your chart should flag pairs that can share a pot, such as a determinate tomato with a single basil plant in a 15-gallon container. For a dedicated container version, see Container Companion Planting Chart: 8 Pairings That Work (2026).

Common Mistakes to Avoid

• Trusting one source. Cross-check any pairing against at least two credible references before you commit a whole bed to it.
• Ignoring spacing. Two good companions planted shoulder to shoulder will compete for light, water, and nutrients.
• Forgetting timing. A lettuce bed that is harvested in May leaves room for a tomato planted in late spring. Map succession windows, not only the first planting.
• Overplanting herbs. Mints spread aggressively and can overwhelm neighbors. Grow them in containers.
• Expecting dramatic results. Companion effects are usually modest. Good soil, consistent watering, and pest monitoring still matter more.
• Never updating the chart. Record what happened each season. Your own notes are the most valuable part of the chart over time.

Tips for Getting the Most from Your Chart

• Print a copy and keep it in your garden journal, not just on your phone.
• Add a column for variety names, since some tomato or bean varieties behave very differently.
• Photograph each bed at mid-season so you can compare layouts year to year.
• Note pest sightings alongside pairings. Patterns often show up within two or three seasons.
• Start with three to five pairings you care about most, then expand the chart as you gain confidence.

Recommended gear

A few simple supplies make it easier to plan, plant, and track your companion layout.

• Garden journal with a planting grid. A bound notebook with a month-by-month layout keeps your pairings, spacing, and results in one place. View on Amazon
• Soil thermometer. Knowing soil temperature helps you time transplants and direct seeding, which affects how companion crops overlap. View on Amazon
• Plant labels with waterproof markers. Labels keep varieties and planting dates visible so your chart matches what is actually growing. View on Amazon

FAQ

Is a veg companion planting chart based on scientific evidence?

Some pairings have research support, such as certain trap crops and pollinator effects. Many others rest on traditional practice or anecdotal reports. A good chart distinguishes between the two, and it is wise to test pairings in your own garden before relying on them.

How often should I update my chart?

Review it at the end of each season. Add notes on what worked, what struggled, and any pest or disease problems. Update it again before you plan the next year.

Can I use one chart for all regions?

Not really. Frost dates, heat, humidity, and pest pressure vary widely. Start with a general chart, then adjust timing and spacing for your USDA zone and local conditions.

Do companion plants replace fertilizer or pest control?

No. Companion planting can support a healthy garden, but it does not replace good soil, adequate water, crop rotation, or monitoring for pests. Think of it as one tool among several.

What is the most common companion planting mistake?

Planting too densely. Even beneficial pairs can struggle when they compete for light and water, so follow spacing guidelines for each crop.

Should I plant marigolds with every vegetable?

Not necessarily. Marigolds are commonly used along bed edges and near crops prone to pests. Their effect on nematodes and insects varies by species and conditions, so treat them as one option rather than a guarantee.

Can I use a companion chart for container gardens?

Yes, with adjustments. Containers have limited soil volume, so pay closer attention to root space, water needs, and mature plant size than you would in a bed.

Where can I find a printable chart?

Extension service websites and university gardening programs often offer free printable versions. Compare two or three before choosing one that matches your crops and region.

Conclusion

A veg companion planting chart works best as a living planning tool. Build it around the crops you actually grow, verify pairings against reliable sources, and respect spacing, timing, and rotation. Record your results each season, and your chart will become more accurate and more useful every year.

About Emily Parker

Emily Parker is part of our editorial team and reviews and edits our vegetable & edible gardening guides, checking product details against manufacturer specifications and owner feedback.