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A container companion planting chart is a simple reference that shows which plants grow well together in pots, grow bags, and other small containers, and which ones should stay apart. Container gardeners face tighter limits than people planting in the ground: less soil volume, faster drying, and fewer square feet to separate crops. A good chart helps you decide which herbs, greens, and fruiting plants can share a pot, how far apart to set them, and where a marigold or a trap crop might fit. The charts below were selected by comparing published specifications, format, plant coverage, and the feedback owners commonly report about readability and print durability. None of them were tested in our own garden; the picks reflect what each product says it offers and how well it tends to serve different kinds of container growers.
Our Top Picks
Quick Comparison
| Product | Best for | Key feature |
|---|---|---|
| Printable Container Companion Planting Chart (laminated) | Gardeners who want a durable chart to keep near the patio | Laminated surface that resists soil and water marks |
| Square Foot Container Companion Chart Set | Growers using square-foot grid spacing in pots and boxes | Grid-based spacing numbers for each plant |
| Herb Pot Pairing Guide Card Deck | Balcony growers focused on herbs and salad greens | Pocket-sized cards, one pairing per card |
| Container Veggie Companion Wall Poster | Visual learners and classroom or community garden settings | Large-format layout with color-coded friend and foe markings |
| Companion Planting Chart Notebook Insert | Gardeners who keep a garden journal | Chart page designed to sit beside planting logs |
| Bucket and Grow Bag Companion Reference Chart | Growers using 5-gallon buckets and fabric grow bags | Container-size guidance matched to plant spacing |
| Dwarf Varieties Container Pairing Chart | Small-space growers choosing compact cultivars | Cultivar notes for dwarf and bush varieties |
| Companion Planting Dry-Erase Garden Board | Gardeners who change plans each season | Reusable surface for updating pairings |
Printable Container Companion Planting Chart (laminated)
This pick suits gardeners who want a single, reliable reference they can clip to a shed wall or lean against a potting bench. Because it is a printed chart rather than a digital file, it works well for quick checks while you are standing in front of your containers.
Key specs
- Printed on card or paper stock intended for lamination
- Typically sized for standard letter or A4 printing
- Lists common container crops including tomatoes, peppers, lettuce, and basil
Pros
- Laminated versions resist moisture and soil smudges
- Easy to print again if a copy is lost
- Clear pairing icons make quick comparisons simple
Cons
- Print quality depends on your home printer and lamination
- Limited space for notes about specific cultivars
Square Foot Container Companion Chart Set
Growers who already use square-foot spacing in grow boxes or wide containers will find this format easiest to apply. It translates companion relationships into how many plants fit in each grid square, which reduces guesswork when you are filling a container to capacity.
Key specs
- Spacing numbers per square for each listed crop
- Grid layout suited to boxes roughly 2 to 4 feet across
- Companion and antagonist pairings marked on the same sheet
Pros
- Direct connection between spacing and pairings
- Useful for dense plantings in limited volume
- Works alongside most square-foot gardening books
Cons
- Assumes a grid layout, which may not suit round pots
- Spacing figures are general and may need adjusting for your climate
Herb Pot Pairing Guide Card Deck
This format fits balcony and windowsill gardeners who grow mostly herbs and salad greens in a handful of pots. Each card focuses on one pairing, so you can sort through options quickly without wading through a full vegetable list.
Key specs
- Pocket-sized cards, one plant pairing per card
- Focus on herbs such as basil, thyme, and parsley
- Notes on light and water needs alongside pairings
Pros
- Portable enough to take to a garden center
- Good for beginners learning herb combinations
- Cards can be shuffled to plan new arrangements
Cons
- Narrow scope if you grow fruiting vegetables
- Cards can be lost or bent without a case
Container Veggie Companion Wall Poster
A large poster works well in a community garden, classroom, or greenhouse where several people need to see the same information at once. Color-coded markings make the friend-and-foe relationships readable from a few feet away.
Key specs
- Large-format print intended for wall mounting
- Color coding for beneficial, neutral, and incompatible pairings
- Covers a broad range of container vegetables
Pros
- Readable at a distance
- Good teaching aid for groups
- Covers many crops on one sheet
Cons
- Takes up wall space and may not fit a small balcony
- Paper posters fade in direct sun unless protected
Companion Planting Chart Notebook Insert
Gardeners who keep a planting journal often want their reference material in the same place as their notes. This insert format sits alongside logs of planting dates, harvests, and pest problems, so you can connect what you planned with what actually happened.
Key specs
- Chart page sized to fit a standard garden journal
- Space for writing planting dates alongside pairings
- Reference section for container spacing
Pros
- Keeps reference and records together
- Inexpensive way to add structure to a journal
- Easy to refer back to season after season
Cons
- Fixed layout limits how much you can add
- Less convenient to view while working at containers
Bucket and Grow Bag Companion Reference Chart
This chart is organized around container size rather than bed layout, which makes it especially useful for 5-gallon buckets, fabric grow bags, and similar vessels. Owners of these containers often struggle to know how many plants a given volume can support, and this format addresses that directly.
Key specs
- Container sizes listed in gallons
- Plant counts per container for common vegetables
- Pairing notes for mixed plantings in one vessel
Pros
- Matches common container types gardeners actually use
- Helpful for planning how many plants fit
- Clear sizing reduces overcrowding
Cons
- Plant counts are estimates and vary by variety
- Less detail on pest interactions
Dwarf Varieties Container Pairing Chart
Compact cultivars change the math for container planting. A dwarf tomato or bush bean may leave room for a companion that a standard variety would crowd out. This chart focuses on those compact types, which makes it a good match for patios and small decks.
Key specs
- Notes on dwarf and bush cultivars
- Pairings adjusted for smaller plant height and spread
- Suggested pot diameters for compact varieties
Pros
- Practical for very small spaces
- Explains how cultivar choice affects pairings
- Useful when shopping for seedlings
Cons
- Not useful for gardeners growing full-size heirlooms
- Cultivar names differ by seed company
Companion Planting Dry-Erase Garden Board
Some gardeners prefer a surface they can change every season. A dry-erase board lets you sketch new pairings, update pot assignments after a failed crop, and erase plans that did not work. It is most useful for growers who rotate crops through the same containers.
Key specs
- Dry-erase writing surface
- Printed or pre-marked companion guide area
- Mounts to a wall or stands on a surface
Pros
- Reusable season after season
- Room to plan rotations and succession sowing
- Easy to update as plants are added or removed
Cons
- Dry-erase marks can fade with outdoor humidity and sun
- Requires a permanent spot near the containers
Buying Guide
Selection criteria
The charts in this list were compared against a few practical questions. Does the chart address container-specific constraints such as limited soil volume and faster drying? Does it cover the crops you actually grow? Is the layout readable at arm’s length while you are working? Does the format hold up to soil, water, and sun? These questions matter more than the number of plants listed.
Important features
- Container-specific spacing. A chart written for in-ground beds may recommend spacing that is too generous or too tight for a 5-gallon bucket.
- Clear pairing notation. Look for distinct markings for beneficial pairs, neutral pairs, and pairs to keep apart.
- Coverage of your crops. A chart focused on herbs will not help much if you are growing peppers and cucumbers.
- Durability. Laminated or weather-resistant materials last longer near a hose and potting bench.
- Portability. A pocket card or clipboard sheet is easier to carry than a wall poster.
Specs to check
- Container sizes covered, in gallons or inches
- Whether spacing is given per plant, per square, or per container
- Whether cultivar or variety notes are included
- Print size and whether the chart is printable at home
- Whether the chart mentions light, water, or temperature needs
Choosing by need
If you grow a mix of vegetables in grow bags and want a durable reference, a laminated printable or a square-foot style chart is a sensible start. If you mostly grow herbs on a balcony, a card deck keeps things simple. Community gardeners and teachers often do better with a wall poster. Gardeners who keep a journal may prefer a notebook insert, while those who rotate crops every season will get the most from a dry-erase board.
Things to watch out for
- Charts that do not mention container size may overcrowd your pots.
- Pairings that look helpful on paper are not always proven in every climate. Treat any chart as a starting point and watch your own plants.
- Some pairings depend on pest pressure, weather, and variety. A chart cannot account for all of these.
- Paper charts fade and warp. Keep a spare copy or store it indoors.
FAQ
What is a container companion planting chart used for?
It is a reference that lists which plants tend to grow well together in pots and other small containers, which ones should be kept apart, and often how many plants fit in a given volume. It saves time when planning a mixed planting.
How is container companion planting different from in-ground charts?
Containers have limited soil, dry out faster, and restrict root space. A container chart usually gives tighter spacing guidance and may note container size, while in-ground charts assume more root room and rely more on bed layout.
Can I combine two plants in one pot?
Yes, if the pot is large enough for both root systems and their light, water, and nutrient needs are similar. A 5-gallon bucket can often hold one tomato or pepper with a small herb, but two large fruiting plants usually need more space. Check your chart’s container size guidance.
Are companion planting charts scientifically proven?
Some pairings have research support, while others rely on long-standing gardening practice with mixed evidence. Results vary with climate, soil, and pest pressure, so treat any chart as a planning tool rather than a guarantee.
Which plants are most often recommended for container companion planting?
Basil with tomatoes, marigolds near many vegetables, and lettuce or spinach in the shade of taller plants are commonly listed. Charts differ on details, so compare a few before deciding.
Should I print a chart or use a digital version?
A printed and laminated copy is easy to check while working outdoors. Digital versions are easy to update and share but need a phone or tablet nearby. Many gardeners keep both.
How often should I update my container plan?
Review your plan at the start of each season and after any crop failure. Container soil is often replaced or amended between seasons, so pairings and spacing may need revision.
Conclusion
A container companion planting chart is most useful when it matches your container sizes, your crops, and how you like to work. For durable everyday reference, a laminated printable or square-foot style chart is a practical choice. Herb-focused balcony gardeners will do well with a card deck, while teachers and community groups often prefer a wall poster. Journal keepers can use a notebook insert, and gardeners who rotate crops each season will appreciate a dry-erase board. Whichever you choose, use the chart as a starting point, note what actually works in your containers, and adjust next season. For related planning ideas, see Companion Planting in Pots: 8 Best Supplies and Setups for Small Spaces (2026), Companion Planting for Tomato: 8 Plants That Help and 5 to Avoid, and What Does Companion Planting Mean? Pairings and Pitfalls.
