Bush bean Companion Plants
Phaseolus vulgaris · legume family · rotation group: legume
The best companion plants for bush bean are Sweet corn, Summer squash, Carrot, Cucumber, and Potato. Avoid planting bush bean near Onion and garlic, Fennel, Sunflower. Of the 11 pairings recorded here, 2 are supported by published research and 8 are traditional practice with no controlled evidence behind them.
What to plant with bush bean
| Plant | Claimed benefit | Evidence | What the evidence actually shows |
|---|---|---|---|
| Summer squash | Squash completes the Three Sisters guild, shading out weeds beneath corn and beans. | Research-backed | The three-crop polyculture is documented to out-yield component monocultures on a land-equivalent basis, though the practical cost is that harvest access is awkward. |
| Sweet corn | Corn and beans grown together out-produce the same area grown as separate monocultures. | Research-backed | The Three Sisters yield advantage is real and measured as a land equivalent ratio above 1; the driver is below-ground niche complementarity in root foraging, not the popular idea that beans feed nitrogen to the corn within the season. |
| Carrot | Carrots grow well beneath bush beans and benefit from the loosened soil. | Traditional | A space and rotation convention; the nitrogen benefit gardeners assume arrives only after the bean residues break down. |
| Cucumber | Cucumbers and beans grow well together. | Traditional | Compatible in season and water needs, but nothing has been tested and beans will be shaded by a sprawling cucumber. |
| Potato | Beans interplanted with potatoes deter Colorado potato beetle. | Traditional | Frequently recommended and mechanistically plausible as visual or olfactory disruption, but no controlled trial was found. |
| Strawberry | Beans and strawberries mutually improve yields. | Traditional | One of the oldest entries in companion charts, with no mechanism proposed and no supporting data. |
| Sweet alyssum | Alyssum flowers bring in hoverflies and parasitoids that control bean aphids. | Traditional | Proven as an insectary plant in lettuce production; the bean application is an extrapolation. |
| Marigold | Marigolds planted with beans repel Mexican bean beetle. | Not supported | No study supports it and the general marigold repellency premise fails when tested: Rutgers work found marigolds failed to repel cabbage, carrot and onion pests, and UMN reports multiple studies disproving the parallel Colorado potato beetle claim. |
What not to plant with bush bean
| Plant | Claimed problem | Evidence | What the evidence actually shows |
|---|---|---|---|
| Fennel | Fennel suppresses bean germination and growth. | Traditional | Laboratory allelopathy of fennel essential oil is documented; a garden-scale effect on beans is not. |
| Onion and garlic | Alliums inhibit bean growth by disrupting their rhizobial nitrogen fixation. | Traditional | Repeated with unusual confidence across garden writing and even some extension companion tables, but the allicin-versus-Rhizobium mechanism traces only to secondary sources and no controlled trial was found. |
| Sunflower | Sunflowers inhibit beans planted near them. | Traditional | Sunflower produces allelopathic compounds active against some species in assays, but the effect on beans has not been tested and shading is the more likely practical issue. |
The honest verdict
Of everything gardeners recommend planting alongside bush bean, 2 pairings have been tested properly: Sweet corn, Summer squash. Those are the ones worth planning your bed around.
The remaining 5 pairings on this page are traditional practice. They circulate on every companion planting chart online, but we could not find controlled evidence testing them. They are not wrong so much as unverified — most cost nothing to try, and interplanting flowers and herbs has its own well-documented benefit of pulling pollinators and predatory insects into the garden.
Widely repeated, not supported: Marigold — No study supports it and the general marigold repellency premise fails when tested: Rutgers work found marigolds failed to repel cabbage, carrot and onion pests, and UMN reports multiple studies disproving the parallel Colorado potato beetle claim.
Every row above links to the publication it came from. See how we grade evidence.
Growing bush bean: the numbers
| Sun | Full sun (6+ hours) |
|---|---|
| Water | Moderate |
| Spacing | 4 in apart · 24 in between rows · 9 per square foot |
| Mature size | about 24 in tall |
| Soil pH | 6–7 |
| Days to maturity | 50–60 days |
| Frost tolerance | Tender — killed by frost |
| Containers | Yes — 5 gallon minimum |
| Typical yield | 4-5 lbs per 10 ft of row |
| Common pests | Mexican bean beetle, bean leaf beetle, aphids, cutworms, spider mites, leafhoppers |
| Common diseases | bacterial blight, halo blight, white mold, bean mosaic virus, root rot |
When to plant bush bean
Zone 6b shownDirect sow outdoors: Apr 10 – Apr 23 — around your last frost date
Expected harvest: May 30 – Jun 9 — 50–60 days from planting
Fall planting: Aug 18 – Aug 31 — 10 weeks before your first fall frost
Those dates are for zone 6b. Get your own dates by ZIP code →
Varieties worth knowing
seeds- Strike — bush snap, earliest common type, 45 days
- Jade — bush snap, slender dark pods, 53 days
- Blue Lake Bush — bush snap, classic flavor and canning standard, 58 days
- Derby — bush snap, All-America Selections winner, 57 days
Variety names link to seeds on Amazon. As an Amazon Associate we earn from qualifying purchases. These are the varieties named in the extension sources for this crop, not a paid placement — where a source recommended a variety for a specific reason, that reason is the note beside it.
Put it in a bed
The garden planner checks every square against this ledger as you place crops — if you drop bush bean next to something recorded as a bad neighbour, the square turns red and tells you why.
Records for the plants named above:
Same rotation group (legume) — don't follow one with another:
Bush bean companion planting questions
What should not be planted next to bush bean?
How far apart should bush bean be planted?
Does companion planting with bush bean actually work?
When should I plant bush bean?
Sources for this record
- Growing beans in home gardens, University of Minnesota Extension
- Snap Beans, Home Vegetable Gardening, University of Illinois Extension
- Growing Green Beans, Iowa State University Yard and Garden
- How to Grow Beans in Your Garden, Utah State University Extension
- Phaseolus vulgaris, NC State Extension Gardener Plant Toolbox
Record compiled 2026-07. Spot an error or a study we missed? Tell us and we'll correct the entry.