Ethan BrooksBy Ethan Brooks

Updated November 2026

A companion planting chart for herbs and vegetables lets you see at a glance which plants help each other and which ones should stay apart. In this guide, you’ll learn how to read a chart, build your own version for your beds, and plan spacing so your herbs and vegetables grow well together.

What a Companion Planting Chart Shows

Most charts list each vegetable or herb in one column and its recommended partners and rivals in another. Good charts also note the reason for each pairing, such as pest deterrence, pollinator attraction, or shade and root competition. Treat the chart as a starting point, since results depend on your climate, soil and pest pressure.

Shopping for one? See our guide: 3 Best Companion Planting Books for Vegetable Gardeners (2026).

Look for three types of entries:

  • Helpful pairs: plants that deter pests or attract pollinators, such as basil near tomatoes.
  • Neutral pairs: plants with no measurable effect on each other.
  • Antagonistic pairs: plants that compete for nutrients or share pests, such as fennel with most vegetables.

How to Build Your Own Chart

A custom chart fits your garden better than a generic one. Start by listing the herbs and vegetables you actually grow, then fill in pairings using a reliable reference and your own notes from past seasons.

  1. List every herb and vegetable in your plan, including perennials like chives and rosemary.
  2. Mark each pair as helpful, neutral or antagonistic, with a short reason.
  3. Note mature size, since a tomato needs roughly 24 to 36 inches of space while basil needs about 10 to 12 inches.
  4. Add the bed or container location so you can see which plants share space.
  5. Review the chart each season and adjust based on what worked.

Spacing Rules That Make Pairings Work

Even the best pairing fails if plants are crowded. Spacing controls airflow, which reduces fungal disease, and gives roots room to draw nutrients without fighting neighbors. Follow the spacing listed on your seed packet, then use the chart to decide which plants can sit closer together.

Matching Herbs to Vegetable Beds

Low-growing herbs such as thyme, oregano and parsley work well as edges or fillers between larger plants. Keep tall herbs like dill and fennel at the bed’s north side, since they shade shorter neighbors and can inhibit growth nearby.

Plant Good Partners Keep Apart
Tomato Basil, parsley, marigold Fennel, potato
Carrot Rosemary, sage, onion Dill, parsnip
Cabbage family Dill, thyme, mint (in pots) Strawberry, tomato
Cucumber Nasturtium, radish, dill Potato, sage

Using the Chart Through the Growing Season

Timing matters as much as placement. Plant fast-maturing radishes between slow crops like broccoli, and use the chart to plan succession so one bed is never bare for long. Mark the chart with planting and harvest dates so you can rotate families and avoid replanting the same crop in the same spot.

Common Mistakes

  • Treating companion claims as guaranteed. Most effects are modest, so healthy soil and watering matter more.
  • Planting mint directly in the ground, where it spreads aggressively. Grow it in a container instead.
  • Ignoring mature size and crowding plants that need full sun.
  • Pairing fennel with nearly everything, since it inhibits many vegetables.
  • Forgetting to adjust the chart for your region and seasonal weather.
  • Garden journal or planner: a place to record pairings and spacing each season, which makes your chart more accurate over time. View on Amazon
  • Plant labels: clear markers keep herbs and vegetables identified when seedlings look alike. View on Amazon
  • Soil thermometer: helps you confirm soil is warm enough before sowing, which affects planting windows on your chart. View on Amazon

FAQ

Do companion planting charts really work?

Some pairings have research support, such as pest reduction from aromatic herbs, while others rely mostly on grower experience. Use charts as a guide and track your own results.

Can I use one chart for both containers and in-ground beds?

Yes, but adjust spacing for container size and root room. Pots dry out faster, so plan watering around the thirstiest plants.

How often should I update my chart?

Review it at the end of each season and again before planting. Note what grew well and what struggled, then revise the pairings.

Conclusion

A companion planting chart for herbs and vegetables turns scattered advice into a plan you can follow. Build one for your own beds, respect spacing and mature size, and update it each year. Your notes will become the most useful guide you have.

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Ethan Brooks

About Ethan Brooks

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