Many plants benefit, as well as are detrimentally affected by, other plants;
whether it is because of soil requirements, synergy, or the pest(s) involved.
Gardening books such as “Carrots Love Tomatoes” offer time tested tips in this
area. The following is a composite of information available on this subject.
| Vegetable | Companion | Enemy |
| Asparagus | Tomatoes, Basil, Parsley | |
| Bush Beans | Almost anything, esp. Corn, Squash (3 sisters of the Field) | Chives, Garlic, Onions |
| Beans, Pole | Corn, Radish, Sunflowers | Beets, Cabbage Kohlrabi, Onions |
| Beets | Brassicas, Lettuce, Onions | Pole Beans |
| Brassicas -Broccoli/ Cauliflower, Kale, Kohlrabi, Cabbage, Brussel Sprouts |
Aromatic Herbs, Potatoes, Celery, Beets, Onion Family, Spinach/Chard | Dill, Pole Beans, Strawberries, Tomatoes |
| Carrots | Peas, Onion Family, Tomatoes, Rosemary, Sage | Dill |
| Celery | Brassicas, Bush Beans, Leeks, Onion Family, Tomatoes | |
| Corn | Beans, Cucumbers, Potatoes, Peas, Pumpkins and Squashes | Tomato |
| Cucumbers -Concurbits including Melons, but not Watermelon | Beans, Carrots, Corn, Lettuce, Onions, Peas, Radish, Sunflowers | Aromatic Herbs, Potatoes |
| Eggplant | Beans, Potatoes | |
| Lettuce | Carrot, Cucumber, Radish, Strawberry | |
| Onion Family -inc. Chives, Garlic, Leeks | Brassicas, Beets, Carrot, Lettuce | Beans, Peas |
| Peppers | Basil, Okra | |
| Potatoes | Beans, Brassicas, Corn | Cucumber, Squashes, Tomatoes, Raspberries |
| Pumpkins | Corn | Potato |
| Radish | Cucumber, Lettuce, Nasturtiums, Peas | |
| Spinach | Strawberries | |
| Squash | Corn, Nasturtiums | Potatoes |
| Strawberries | Bush Beans, Spinach, Onions | Brassicas |
| Tomatoes | Asparagus, Basil, Onion Family, Parsley, Nasturtiums | Brassicas, Corn, Potatoes |
| Turnips | Peas | Potatoes |