Plants that share bed space tend to do better or worse depending on neighbors. The "three sisters" (corn, beans, squash) is the famous example. Below is the matrix for plants in our guide. Click any plant for its full profile.
| Plant | Type | ✓ With | ✗ Avoid |
|---|---|---|---|
| Basil | herb | tomato, pepper | — |
| Bell Pepper | vegetable | tomato, basil, onion | fennel, kohlrabi |
| Cabbage | vegetable | celery, onion, potato | tomato, strawberry |
| Carrot | vegetable | tomato, onion, leek, rosemary | dill |
| Cucumber | vegetable | bean, corn, radish, sunflower | potato, sage |
| Dill | herb | cucumber | carrot |
| Green Bean (Bush) | vegetable | corn, squash, cucumber, celery | onion, garlic, fennel |
| Half Runner Bean | vegetable | corn, squash | — |
| Kale | vegetable | onion, beet, celery | strawberry, bean |
| Lettuce | vegetable | carrot, radish, strawberry | — |
| Marigold | flower | tomato, pepper, squash, cucumber | — |
| Onion | vegetable | carrot, beet, lettuce, strawberry | bean, pea |
| Parsley | herb | tomato, asparagus | — |
| Potato | vegetable | bean, corn, horseradish | tomato, cucumber, pumpkin |
| Sunflower | flower | cucumber | — |
| Sweet Corn | vegetable | bean, squash, cucumber | tomato |
| Tomato | vegetable | basil, carrot, onion, parsley | cabbage, corn, fennel |
| Zucchini | vegetable | corn, bean, nasturtium | — |
Source: traditional companion-planting knowledge (public domain). Effects vary by soil, climate, and microclimate — treat as guidelines, not hard rules.