Companion planting isn’t just about “this goes with that” or “don’t plant that with this”. It’s often more complex and closely tied to the concept of creating a biodiverse garden. Companion planting involves strategically placing plants that have beneficial effects on planting next to each other, especially vegetables and herbs.
| Plant | Good Companion | Bad Companion |
| Beans | Carrot, celery, cabbage family, peas, cucumber, potatoes, parsnip, lettuce, parsley, eggplant, marigolds | Beetroot, fennel, onion, garlic, kohlrabi, sunflowers |
| Beetroot | Kohl rabi, onion, silver beet, lettuce, cabbage family, dill, lovage, marjoram | Beans, tomatoes |
| Cabbage family (broccoli, cabbage, cauliflower, Brussels sprouts) | Beetroot, celery, dill, chamomile, onion, mint, potatoes, rosemary, sage, thyme, lavender, hyssop, nasturtium, tansy, beans, peas, coriander, marigolds, lettuce | Rue, strawberries, tomatoes, garlic |
| Carrots | Chives, lettuce, onion, leek, peas, rosemary, sage, tomatoes, radish | Dill |
| Celery | Beans, cauliflower, cabbage, leek, tomatoes, dill | Strawberries, carrots, parsnips, cucumbers |
| Corn | Beans, cucumber, peas, potatoes, pumpkin, squash, melons, parsnip, zucchini | Nil |
| Cucumber | Rosemary, potatoes, dill, kohlrabi, fennel, strawberries | Tomatoes, kale, broccoli, potatoes, fennel |
| Eggplant | Beans, marjoram, potatoes | Beans, chives, corn, Jerusalem artichoke, peas, sunflower, celery, lettuce, and nasturtium |
| Lettuce | Carrot, cucumber, onion, radish, strawberries, beetroot, marigolds | All brassicas |
| Onions, Garlic | Beetroot, chamomile, carrot, lettuce, radish, cabbage family, tomatoes, silver beet | Peas, beans, potatoes |
| Peas | Beans, carrot, cucumber, corn, radish, swede, turnip, squash | Onion, garlic, potatoes, shallots |
| Potatoes | Beans, cabbage family, corn, eggplant, horseradish, marigolds, peas, nasturtium, parsnip | Cucumber, pumpkin, sunflower, onions, tomatoes, rosemary |
| Pumpkin/ Squash, zucchini | Corn, nasturtium, marjoram | Jerusalem artichoke, potatoes |
| Radish | Carrot, chervil, lettuce, peas, onions, nasturtium, parsnip | Hyssop |
| Spinach | Strawberries, beetroot, onion | Potatoes, brassicas, turnips |
| Silver beet | Lavender, marigolds | Basil |
| Strawberries | Bush beans, borage, lettuce, spinach, silver beet, onion (not garlic) | Cabbage family, tomatoes, garlic |
| Tomatoes | Asparagus, basil, carrot, chives, mint, nasturtium, parsnip, onion, corn, borage, parsley, marigold, celery, beetroot, fennel, onion, garlic, kohlrabi, sunflowers | Rosemary, potatoes, dill, kohl rabi, fennel, strawberries |
