The idea that herbs make good companion plants is not new. Some of the earliest written documents on gardening discuss these relationships. When selecting your companion plants you will need to consider more than which pests are deterred. Decide what each plant adds or takes away from the soil and what effect the proximity of strong herbs may have on the flavor of your vegetables. Try to avoid placing two heavy feeders or two shallow rooted plant types near each other.  Chart reprinted from

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Herb Companions Pests Repelled
Angelica Avoid Dill  
Basil Tomatoes
Dislikes Rue
Flies, Mosquitoes
Borage Tomatoes, Squash, Strawberries Tomato Worm
Caraway Plant throughout the garden to loosen the soil.
Avoid Dill
Catnip Eggplant Flea Beetle, Ants
Chamomile Cabbage, Onion  
Coriander   Aphids
Chervil Radish  
Chives Carrots  
Dead Nettle Potatoes Potato Bug
Dill Cabbage
Dislikes Carrots and Caraway
Fennel Most plants dislike this herb  
Feverfew roses attracts aphids away from roses
Flax Carrots, Potatoes Potato Bug
Garlic Roses, Raspberries Japanese Beetle, Aphids
Horseradish Potatoes Potato Bug
Henbit   General Insect Repellent
Hyssop Cabbage, Grapes
Dislikes Radishes
Cabbage Moth
Lavender   Moths — combine with southernwood, wormwood and rosemary in an anti-moth sachet
Marigolds Plant throughout the garden Mexican Bean Beetles, Nematodes, others
Mint Cabbage, Tomatoes White Cabbage Moth, aphids, flea beetles
Mole Plant   Moles and Mice
Nasturtium Radishes, Cabbage, Cucurbits, fruit trees Aphids, Squash Bugs, Striped Pumpkin Beetle
Pennyroyal Roses Flies, Mosquitoes, Fleas, others
Petunia Beans  
Pot Marigold Tomatoes Tomato Worm, Asparagus Beetles, others
Pyrethrums   Use dried flower heads as a general insect repellent.
Rosemary Cabbage, Beans Carrots, Sage Cabbage Moth, Bean Beetle, Carrot Fly
Rue Roses and Raspberries
Dislikes Sweet Basil
Japanese Beetles
Sage Rosemary, Cabbage, Carrots
Dislikes Cucumbers
Cabbage Moth, Carrot Fly, Flea Beetle, Slugs
Southernwood Cabbages Cabbage Moth
Sowthistle Tomatoes, Onion, Corn
Plant in moderation
Summer Savory Beans Bean Beetles
Tansy Fruit Trees, Roses, Raspberries Flying Insects, Japanese Beetles, Striped Cucumber Beetles, Squash Bugs, Ants, Flies
Thyme Cabbage Cabbage Worm
Wormwood   Plant as a border to keep animals out of the garden.
Yarrow Plant near aromatic herbs to enhance production of essential oils.  

Category: Gardening with Herbs
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