Companion planting pairs beneficial plants in the garden. Plant herbs with your tomatoes to deter garden pests without the use of harmful pesticides. These herbs grow well under the same conditions favored by tomatoes. When you harvest your tomatoes, pick a few herbs to flavor a salad or sauce.
Basil (Ocimum basillicum) not only is great in tomato sauce, it helps repel aphids and whiteflies. Pinch back the plants regularly to encourage bushy growth. Use the cuttings in pesto, salads or sprinkled fresh on tomato slices.
Calendula (Calendula officinalis) also know as poet's marigold, has edible yellow and orange blossoms that add a peppery flavor to salads. Calendula repels tomato hornworms.
Chives (Allium schoenoprasum) lend a mild onion flavor to salads and cooked dishes. Both the flowers and leaves of chives are edible. Chives repel aphids, Japanese beetles and rabbits, according to the Cornell University Extension Service.
Mint (Menta sp.) makes a nice addition to iced tea, and is the foundation for mint jelly to accompany lamb. In the garden, mint plants repels aphids and flea beetles. Plant mind in pots and set the pots in the garden among the tomato plants. Directly planted in the garden, mint expands rapidly and can take over.
Sage (Salvia officinalis) has a savory flavor that enhances meat and game. Sage is an essential ingredient in dressing . Planted near tomatoes, it discourages slugs and flea beetles.