Ethan BrooksBy Ethan Brooks

Updated November 2026

A square foot gardening printable companion planting chart gives you a quick reference for which vegetables grow well together and how many plants fit in each square. This guide shows you how to choose or make one, read it correctly, and lay out your grid so the pairings actually work. Most of the effort is in the setup, and once it is done, planting season goes much faster.

What a Square Foot Garden Chart Should Include

Many free charts circulate online, but they vary in quality. A useful printable should list each crop, the number of plants per square (typically 1, 4, 9, 16, or 25 per 12-inch square), its good companions, and the plants it should stay away from. Check that the chart uses the standard 12-inch square grid, since charts built for row planting will give you wrong spacing.

Crop Plants per Square Good Companions Keep Apart
Tomato (staked) 1 Basil, carrots, parsley Potatoes, fennel
Bush beans 9 Carrots, cucumbers, marigolds Onions, garlic
Carrots 16 Lettuce, onions, tomatoes Dill
Lettuce 4 Carrots, radishes, strawberries Cabbage family

Use this layout as a model when you compare charts. If a printable doesn’t give plant counts per square, it will be hard to use on a real grid.

How to Read the Chart and Plan Your Grid

Start by listing the crops you want to grow. Look each one up on the chart and note the plants-per-square number. Then sketch your bed on graph paper, with each square representing one foot by one foot. A standard 4-by-8-foot bed has 32 squares.

  1. Assign tall crops, such as pole beans or staked tomatoes, to the north side of the bed so they do not shade shorter plants.
  2. Place one crop per square, or the number listed on the chart, and mark it on your sketch.
  3. Check each square’s neighbors against the companion list. Replace any conflicting pair.
  4. Leave one or two squares for succession planting, such as lettuce or radishes that mature quickly.

If you want a deeper look at spacing logic, the guide Companion Planting in a Square Foot Garden: A Step-by-Step Guide walks through the same process with worked examples.

Printing and Using Your Chart in the Garden

Print the chart on heavier paper or laminate it so it survives soil and water. Keep a copy in your garden journal and another near the bed. Many gardeners tape the chart to a shed wall during planting season.

When you use the chart, pair it with a planting calendar for your zone, since the right transplant date matters as much as the right neighbor. For a quick comparison of printable options, see 6 Best Garden Layout Free Printable Printable Companion Planting Charts (2026): Our Picks.

Common Mistakes to Avoid

  • Planting too many seeds per square. Thin seedlings to the chart’s number, or yields and airflow both suffer.
  • Using a row-garden chart in a square foot bed. Spacing rules differ, so confirm the grid format before you plant.
  • Ignoring crop size. A square labeled for one plant should not hold a sprawling squash.
  • Forgetting that companion charts are guidelines. Test your own pairings and keep notes for next season.

A sturdy grid marker makes it easier to keep squares straight once plants fill in. Look for something labeled as a square foot garden grid kit or grid frame. View on Amazon

Waterproof plant labels help you match each square to your printed layout. View on Amazon

A soil thermometer lets you confirm soil temperature before sowing warm-season crops like beans and cucumbers. View on Amazon

FAQ

Is a square foot gardening companion planting chart accurate?

Charts give useful general guidance, but results depend on climate, soil and variety. Treat the chart as a starting point and adjust based on what grows well in your own bed.

Can I use a printable chart for container gardens?

Yes, as long as the containers are large enough for the crop and you follow the same plants-per-square numbers. Smaller containers may need fewer plants than the chart suggests.

How often should I update my chart?

Review it each season and note which pairings worked. Many gardeners revise their printable after one or two growing seasons to reflect local results.

Conclusion

A square foot gardening printable companion planting chart is most useful when you read it carefully, sketch your grid before planting, and keep notes on what works. Start with a few familiar crops, follow the plants-per-square numbers, and refine the layout each year. With a clear chart in hand, your bed will be easier to plan and maintain.

Ready to choose one?

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.